Questionnaire m.e

7/28/2019 Questionnaire m.e.

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Ans: the soil is clayey27. As a Materials Engineer, how can you determine that the

sample placed in the oven is already oven dried?Ans: if the sample reaches its constant weight

28. In oven drying a sample for test, what temperature shall bemaintained?Ans: 110 5oC

29. Why is it that cooling an oven dried sample before weighing isadvisable?

Ans: because it can affect its weight30. What is the difference between hygroscopic moisture content

from natural moisture content?Ans: hygroscopic moisture content is the moisturecontent of an air- dried sample while natural moisturecontent is the moisture content of the original samplefrom the field.

31. For how many bags of cement does a 10 kgs. samplerepresents?Ans: 2000 bags

32. For 15, 000 kgs RSB, how many samples shall be submitted for

Quality Test?Ans: 2 pcs 1 m sample33. An admixture is being introduced to the fresh concrete mixture

for heavily reinforced concrete structure using a pumpcrete topump out the fresh concrete mix, what admixture should it be?Ans: Superplasticizer

34. What is the use of blown asphalt?Ans: as joint filler and water proofing

35. What asphalt is commonly known as hot asphalt or penetrationgrade asphalt?Ans: Asphalt Cement

36. How many days does the sample for Immersion Compression

Test be soaked in water?Ans: 4 days @ 50 oC

37. If ductility test is for asphalt, _____ is for cement?Ans: Magnesium Oxide, Insoluble Residue, Loss onIgnition

38. Paint is composed of _____Ans: 35% vehicle, 50% pigment, 15% beads

39. What is the size of tamping rod used in tamping concsample?Ans: 16 mm and 610 mm long with hemispherical t

40. What is the temperature to be maintained when curing saafter its initial curing?Ans: 23o C 1.7o C

41. Concrete cylinders are cured and ready for test. Temperabetween 63F to 85F are permitted for a period not to ex_____ hours immediately prior to test if free moistumaintained on the surface of the specimen at all times.Ans: three (3)

42. The molds of specimen not to be transported shall be remafter initial curing of _____ hours and should be cured tostandard curing temperature of 73.4 F 3FAns: Twenty-four (24)

43. High plasticity index means _____ of a soil?Ans: high degree of compressibility

44. Sample to be used for liquid limit and plastic limit tests sh

pass to what sieve?Ans: No. 40 (0.425 mm)45. What compaction rammer shall used if the specs give

Moisture Density Relation Test (MDR) is T 180?Ans: 4.54 kg with 457 mm drop

46. A bean mold measuring 6 x 6 x 20 is to be used for samconcrete, how many blows/tamps per layer shall be appliedAns: 60 blows/layer

47. If asphalt mix having a weight of 3,020g and an aggreweighing 2,865.98g, what is the % asphalt by weight of mixAns: 5.10%

48. What is the material used for Bituminous Prime Coat?

Ans: Cut-back asphalt49. In Item 303, application of cover aggregates shall be evspread over the surface at the rate of approximately _____?Ans: 0.004 to 0.007 m3/m2

50. Applying the tolerance of 0.4% for asphalt content to answer in prob. 47, what is the acceptable range of aspcontent?


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Ans: 4.7% to 5.5%51. An embankment having a PI of 30%, LL of 40% and GI of 0,

what is the degree of compaction for this kind of soil?Ans: 95% degree of compaction

52. The minimum cement factor for concrete Class A is 9bags/cu.m, how about for concrete Class B?Ans: 8 bags/ cu.m

53. Quality control testing in a DPWH project is the responsibility ofthe_____?Ans: Contractor

54. As Materials Engineer, when is the right time to start samplingand testing aggregates?Ans: Once the source is identified

55. The minimum compressive strength for concrete Class P is5,000 psi, what is the minimum compressive strength forconcrete Class C?Ans: 3000 psi

56. The volume of concrete mixer per batch shall not exceed themixers nominal capacity in cu.m as shown on themanufacturers standard plate on the mixer, except that anoverload up to _____ percent above the mixers nominalcapacity may be permitted provided concrete test data forstrength, segregation, and uniform consistency are satisfactory,and provided that no spillage of concrete takes place.Answer: Ten (10)

57. Where do we take additional cores when the measurement of

any core taken from pavement is deficient in thickness by morethan 25 mm?Answer: at no less than 5 meter intervals parallel to thecenterline in each direction from the affected location

58. Under what climatic condition do we use lower penetrationgrade or hard asphalt?

Answer: hot climate (cold climate higher penetragrade or soft asphalt)

59. What is the basis for the acceptance or rejection ofconstruction material?Answer: Materials test results/reports

60. Penetration test is for asphalt: cement is to _____?Answer: consistency

61. Slump test is a very important test in fresh concretdetermine _____?Answer: consistency of concrete

62. How many samples should be taken for an asphalt mix for full days operation?Answer: at least one but not to exceed three sample

63. The thickness of asphalt core using a caliper is based onmany measurements?

Answer: four (4)64. The thickness of concrete core using a caliper is based on

many measurements?Answer: nine (9)

65. Failed samples do not necessarily mean that the structurepresents is defective, why?Answer: may be the sampling is incorrect

66. The specification calls for a 1: 2:4 concrete mix. In abagger mixer, which of the following amount of water is likely required for the mix?

Answer: 20 liters

67. The spot test on asphalt is used to determine ______.Answer: overheating during the process of manufact

68. How many samples shall be submitted for test if 315 paflat wall enamel paint are to be used in the project?


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Answer: four (4) pails

69. Aggregate Sub base course has a volume of 5, 000 cu.m andto be laid in a 15cm compacted depth. How many samples shallbe submitted for CBR test and for sieve analysis?Answer: 2 samples for CBR and 17 samples for sieveanalysis

70. How many samples shall be submitted for quality test if 60

tons of Bituminous Prime Coat is to be used in the project?Answer: Two (2) samples

71. How many compaction tests shall be conducted for Item 201having a volume of 8,250 cu.m?Answer: Six (6) compaction tests

72. What composed of Materials Quality Control Monthly Reports?Answer: Summary of field tests and status of test

73. What is the required mixing of mortar for Item 505 (Stone

Masonry)?Answer: 1 part cement and 2 parts sand by volume withsufficient water

74. What is the required mixing of mortar for Item 500 (PipeCulverts and Storm Drains)?Answer: 1 part cement and 2 parts sand by volume withsufficient water

75. Before the project starts, the materials Engineer or thetechnician must have a program on how many samples for eachitem of work should be tested based on the minimum testing

requirements. What program or report is this?Answer: Quality Control Program

76. If sample splitter is not available for use in reducing samplesfor test, what is the alternative way of reducing sample fortesting size?

Answer: apply quartering method and get two opposides as sample

77. The road will not be opened to traffic until test specimmolded and cured have attained the minimum strerequirements. If such tests are not conducted prior tospecified age the pavement shall not be operated to traffic_____ days after the concrete was placed.Answer: Fourteen (14)

78. As the work progresses, the Materials Engineer should khow many sample has been submitted and tested andmany samples are to be submitted, in other words the ME refer to what report so that he/she may be updated onbalance and on file quality test of the construction matebeing used in the project?Answer: Status of Test

79. It is the minimum moisture content at which the soil camolded without breaking or crumbling up to 1/8 (3.2 mm).Answer: Plastic Limit

80. The _____ is expressed as the moisture content corresponto 25 blows.Answer: Liquid Limit

81. The concrete has been tested for consistency by the useslump cone with base and tamping rod. After the testheight of concrete measured is 178 mm. what is the slumthe concrete?Answer: 127 mm

82. What is the rate of revolution per minute of an abr

Machine used for testing the mass percent of wear?Answer: 30 33 rpm

83. If the design of concrete mix has the following corrected bweights: cement = 40 kgs, fine aggregates = 65 kgs, coaggregate = 115 kgs, and water = 15 liters. What is your abatch weights for 1 cu.m Class A concrete?


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Answer: 360 bags of cement; 585 kgs of fine aggregates;1035 kgs coarse aggregates; 130 liters water

84. After the soil has been tested in an Abrasion Machine, themass % of wear computed is equal to 21%. If this material is forItem 201, does it pass the DPWH specs?Answer: Yes, because the specs is 50% maximum

85. Quality Control Assurance Report should be submitted every

_____?Answer: week

86. One of the duties of Materials Engineer is to see to it that allthe construction materials be tested:Answer: before it is incorporated into work

87. What is the maximum depth or roadway embankment perhorizontal layer in loose measurement?Answer: 200 mm loose measurement

88. Why is it that 6 samples are needed for quality test of concretemasonry?Answer: 3 samples for compressive strength and 3samples for absorption

89. Sample submitted for test should have a tag bearing the nameof the project, the quantity represented, kind of sample, originalsource, who sampled and who submitted it, the date sampledand date submitted and etc. What is the common name of thattag for you as Materials Engineer?Answer: Sample Card

90. If course aggregate like embankment is to be placed in layers,

how many layers should a 40 cm thick Aggregate Base Courseis placed?Answer: Three (3)

91. The ME should always be alert of his schedule with regards tothe number of days of a quality test that takes place. Since notall construction materials can be tested just for a day or even a

week so, what is the lead time should he consider for a qutest of a cement sample?Answer: One (1) month

92. CBR Sample for test has been compacted but it shoulsoaked for how many days before testing?Answer: Four (4)

93. If sieve analysis and plasticity test are used for

Classification, what test that its result be used in field detest?Answer: Compaction Test or Moisture Density RelaTest

94. Heavy rains occur the night before prior to your scheduleddensity test, are you going to pursue your schedule? Why?Answer: No, because the moisture content is high can affect the result

95. Checking the gradation of composite aggregates and ascontent of asphalt mix can be done by what test?Answer: Extraction Test

96. What is the device used in testing for liquid limit test?Answer: liquid limit device with grooving tool

97. What apparatus is used in plastic limit test?Answer: glass plate

98. How long does a vibrator be inserted in a concrete mix?Answer: not to exceed 15 seconds at 50 60 cm inte

99. Along the slope of high embankment _____ is provided aerosion control measures and also to improve the stabilithe slope.Answer: Berm


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100. In soil and sub surface explorations for flood control designof foundation condition, a soil sample was taken for field andlaboratory tests. The test required for soil was taken, exceptAnswer: specific gravity, abrasion, water content, AtterbergLimits, gradation, compaction, relative density

101. Structure crossing above such covered underground drainageconduit shall be laid at least _____ above the top of the conduit.Answer: 1.0 m, 0.5 m, 1.5 m, 2.0 m

102. Class of stones for riprap ranging from 30 kgs to a maximumof 70 kgs with at least 50% of the stones weighing more than50 kgs.Answer: Class B

103. Class of stones for riprap ranging from 15 kgs to a maximumof 25 kgs with at least 50% of the stones weighing more than20 kgs.Answer: Class A

104. Class of stones for riprap ranging from 60 kgs to a maximumof 100 kgs with at least 50% of the stones weighing more than80 kgs.Answer: Class C

105. Class of stones for riprap ranging from 100 kgs to a maximumof 200 kgs with at least 50% of the stones weighing more than1500 kgs.Answer: Class D

106. The maximum size of stone for stone masonry.Answer: 150 mm

107. The maximum size of aggregate for item 300.Answer: 1 inch

108. Required maximum liquid limit for Item 300.Answer: 35%

109. Required plasticity index range on Item 300.Answer: 4% to 9%

110. Range of sand size.Answer: 2.0 mm to 0.050 mm

111. The ratio of the volume of voids to volume of solidsAnswer: void ratio

112. The ratio of the weight of water to the weight of solids

Answer: moisture content

113. Significance of grading test are, exceptAnswer: Gives particle size distribution, measures permeabcapillarity, measures the potential cohesion of soil

114. Significance of plasticity index are, exceptAnswer: indicates compressibility, permeability, indicatesclay fraction of a binder material, measures the shearesistance of soil

115. Properties of concrete are, exceptAnswer: workability, strength, durability, cracking

116. In roadway construction test on sub grade, the followingdetermine the economical thickness, exceptAnswer: embankment, base, surfacing, sub-base

117. The relative consistency of a cohesive soil in natural stateAnswer: Liquidity Index

118. In Atterberg limit, the following are determined, except

Answer: shrinkage limit, liquid limit, plastic limit, group ind

119. Minimum time for removal of forms and false workcentering under girders, beam, frames and arches.Answer: 14 days (minimum % of design strength 80


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120. Minimum time for removal of forms and false works for floorslabs.Answer: 14 days (minimum % of design strength 70%)

121. Minimum time for removal of forms and false works for walls.Answer: 1 day (minimum % of design strength 70%)

122. Minimum time for removal of forms and false works forcolumns.

Answer: 2 days (minimum % of design strength 70%)

123. Minimum time for removal of forms and false works for side ofbeams and all other vertical surfaces.Answer: 1 day (minimum % of design strength 70%)

124. Amass of solid reinforced concrete cast around the head of agroup of piles to ensure that act as a unit to support theimposed loadAnswer: Pile cap

125: An embankment shall be compacted layer by layer.Answer: 150 mm

126. Class of concrete deposited in water.Answer: Class Seal

127. Class of concrete used in all superstructures and heavilyreinforced substructures. The important parts of the structureincluded are slabs, beams, girders, columns, arch ribs, boxculverts, reinforced abutments, retaining walls, and reinforcedfootings.Answer: Class A

128. Class of concrete used in footings, pedestal, massive piershafts, pipe bedding and gravity walls, unreinforced or w/ only asmall amount of reinforcement.Answer: Class B

129. Class of concrete used in thin reinforced sections, railpre-cast piles, cribbing, and for filler in steel grid floors.Answer: Class C

130. Class of concrete used in pre stressed concrete strucand members.Answer: Class P

131. Height of dropping concrete to the point of deposit

Answer: 1.50 m

132. Reflectorized Thermoplastic Pavement MarkingsAnswer: Item 612

133. Permitted variation from the design thickness of layeItem 300Answer: + 15 mm and 5 mm

134. Item 310 shall have a mass percent of air voids with rang_____Answer: 3% to 5 %

135. Dowel bars for PCCP shall be _____Answer: plain bars

136. Concrete beam sample when tested by Third Point Meshall have a flexural strength of _____ when tested in 14 dayAnswer: 3.80 MPa

137. When the required thickness of Item 200 is more thanmm, the aggregate sub base shall spread and compacte____

` Answer: two or more layers

138. Item 202 shall have a minimum soaked CBR value of ____Answer: 80%

139. Permitted variation from design thickness of layer for 201.


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Answer: 10 mm

140. Sieve designation standard (in mm) for 0.425 mm to alternateUS standardAnswer: No. 40

141. If slag is used as course aggregate for Item 311, the minimumdensity is _____Answer: 1,120 kg/m3

142. Minimum price allowed of contract for deficiency in strengthof concrete specimens for PCCP which 10% to less than 15%Answer: 70%

143. This joint is also called cold joint. It is constructed when thereis an interruption of more than 30 minutes in the concretingoperationAnswer: Transverse Construction Joint

144. Minimum variation of the surface from the testing edge of thestraight edge between contacts with the surface in Item 310Answer: 6.0 mm

145. Portland Cement Treated Plant Mix Base Course after thecompletion of the final rolling, the surface will be treated withbituminous curing seal, how much is the rate of application?Answer: 0.5 L/m2 to 1.0 L/m2

146. In Item 201, the volume required in the project is 10,000cu.m. The required number of CBR test is _____Answer: four (4)

147. Slump test of concrete determines the following, exceptAnswer: workability, fluidity, consistency,job density

148. The significance of liquid limit are the ff., exceptAnswer: measures the shearing resistance of soil, measures thepotential cohesion of soil, fineness and shape of grain,Atterberg limits

149. In soil classification, 35% or less passing No. 200 sievethe ff., exceptAnswer: A-1, A-2, A-3, A-4

150. To evaluate the performance quality of a soil as a highsubgrade materialAnswer: Group Index

151. If the paving of concrete pavement will be done at the200 ln.m, half width per paving day, how many sets of conbeam samples shall be required. Given: A = 115,000 swidth = 6.50 m, thickness = 230 mmAnswer: 353 sets

152. The required liquid limit for selected borrow toppingsAnswer: 30%

153. The maximum plastic limit for selected borrow toppingsAnswer: 6%

154. Soil is considered unsuitable material when the liquid and plastic limit exceedsAnswer: 80% and 55% respectively

155. Soil is considered unsuitable when the material density isAnswer: 800 kg/cu.m or lower

156. The plasticity index is determined in accordance withAnswer: AASHTO T 90

157. The liquid limit is determined in accordance with

Answer: AASHTO T 89

158. The required compaction of embankment, layer by layerAnswer: 95%

159. The minimum compaction trial of embankmentAnswer: 10 m wide by 50 m long


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160. At least how many in situ density tests should be carried outfor each 500 m2 of each layer of compacted fill?

Answer: three (3)

161. Maximum plasticity index for Item 200Answer: 12%

162. Maximum liquid limit for Item 200

Answer: 35%

163. Maximum size of grading requirement for Item 200Answer: 2

164. The Los Angeles Abrasion Test for aggregate sub-base courseis determined in accordance withAnswer: AASHTO T 96

165. The required abrasion loss for Item 200Answer: 50%

166. The minimum CBR required for Item 200Answer: 25%

167. The required soaked CBR for aggregate sub-base course isdetermined byAnswer: AASHTO T 193

168. Minimum required percent compaction of each layer ofaggregate sub-base courseAnswer: 100%

169. In place density determination of aggregate sub-basecourse material shall be made in accordance withAnswer: AASHTO T 191

170. In some areas where the conventional base course materialsare scarce or non available, the use _____ allowable percent

weathered limestone (anapog) blended with crushed stongravel.Answer: 40% (60% - crushed stones or gravel)

171. Maximum size of aggregate for base course material ugrading BAnswer: 1 inch

172. Maximum required percent abrasion loss for Item 202

Answer: 45%

173. Maximum required mass percent shall have at least onfractured face of Item 202Answer: 50%

174. Minimum required soaked CBR for Item 202Answer: 80%

175. Maximum size of aggregate for Item 202 under grading AAnswer:1 inch

176. Maximum size of aggregate for Item 201 under grading AAnswer: 2

177. Maximum size of aggregate for Item 202 under grading BAnswer: 1 inch

178. This item consists of a foundation for surface cocomposed of soil aggregate, lime, water in proper proporroad mixed and constructed on a prepared subgrade/subbAnswer: Lime Stabilized Road Mix Base Course (

203)179. The required plasticity index for Item 203

Answer: 4% to 10%

180. Maximum required mass percent of wear for the aggregaItem 203


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Answer: 50%

181. Maximum size of aggregate for Item 203 under grading A andBAnswer: 2

182. Item number for water?Answer: Item 714

183. In Item 203, how much is the required mass percent of limeto be added to the soil aggregate?Answer: 3% to 12%

184. Minimum soaked CBR for Item 203Answer: 100%

185. Required percent compaction for Item 203Answer: 100%

186. Equipment to be used for initial rollingAnswer: Pneumatic tire roller

187. Equipment to be used for final rollingAnswer: 3 wheel tandem type steel wheel roller

188. The test on asphalt cement consisting of heating the asphaltin an open cup and passing a small test flameAnswer: flash point

189. It is a manually operated device for deriving a measurementof roughness from the surface profile which may be expressedin terms of International Roughness Index.

Answer: Merlin Road Roughness Measuring Device190. It is used for the rapid in situ measurement of the structural

properties of existing pavement with unbound granularproperties.Answer: Dynamic Cone Penetrometer

191. What is the thinnest cut back asphalt?Answer: MC 3000

192. In the construction of bridges projects, what is the meused to determine the casting length of the regular piles?Answer: Test Pitting

193. It is an equipment which is used to measure differedeflection between joints of a concrete pavement, to deter

the modulus of the existing slabs for use in the design overlay, and to determine the remaining life of exipavement.Answer: Falling Weight Deflectometer

194. What is the equipment used to pinpoint rebars, condpipes, nails and other metals embedded in concrete bcutting or drilling?Answer: Rebar Locator

195. What is the instrument or equipment used to measursurface test of concrete and asphalt pavements as soon aconcrete has hardened sufficiently or as soon as the aspmix has been initially compacted?Answer: 3 meter straight edge

196. What is the latest state of the art equipment consuradioactive material which is commonly used in the compacontrol of earth and asphalt road construction and inmeasurement of moisture content?Answer: Nuclear Density Gauge

197. It is an instrument used to measure pavement deflec

resulting from vehicle wheel loadings. The results of the eldeformation tests are used to evaluate the structural condof roads, and to help in the design of road strengthemeasures and road capacity improvement.Answer: Benkelman Beam and Deflection Logger


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198. What is the instrument that is used for examining the qualityof rigid materials such as rocks and concrete? This instrument isa non destructive portable instrument with dimensions of 110mm x 180 mm x 160 mm and its main uses includes thedetermination of concrete strength (either in situ or pre cast),also to determine the presence of voids, cracks and otherimperfections.Answer: Pundit Ultrasonic Concrete Tester

199. Soil stabilizing agentAnswer: Lime for silty and clayey soil

Cement fro sandy soil

200. Water content at which soil passes from plastic to liquid state.Answer: LIQUID LIMIT

201. Water content at which soil passes from semi solid to plasticstate.

Answer: PLASTIC LIMIT

202. Water content at which soil passes from solid to semi solid.

Answer: SHRINKAGE LIMIT

203. Steel bars placed along longitudinal joints to hold theadjoining slabs together are called _____

Answer: tie bars

204. The concrete pavement surface shows high spots of 15 mm ina 3 m straight edge. The concrete in the area represented bythese high spots _____

Answer: shall be removed and replaced (but if highspots being noted exceeds 3 mm but not exceeding 12

mm, it shall be ground down only.205. The calibration of the Universal testing machine is conducted

_____Answer: Once a year

206. What is the sampling requirement of bituminous mixture?

Answer: 1 sample per 130 tonnes

207. What is the depth of the thermometer inserted inbituminous mixture?

Answer: 2

208. In the design of bituminous mix, the design criteristability under the Marshall Stability Method for heavy tra____

Answer: 1800 lbs

209. The stability criteria of the Marshall Stability Method ismaximum load resistance that a specimen will develo_____

Answer: 60

210. Bituminous mix specimens are compacted at how many bat each end for a heavy traffic design under the MaStability Method?

Answer: 75 blows

211. In a penetration test, if the penetration is 9. What is the gof the asphalt?

Answer: 85 100

212. In case of scarcity or non availability of Type I Portcement, what type of pozzolan shall be used?

Answer: Portland Pozzolan Cement Type 1P

213. The required flexural strength of concrete beam sampItem 311 when tested by the midpoint method.

Answer: 4.50 MPa

214. The required forms to be used in concrete pavement are Answer: Steel forms of an approved section

215. Sowing of the weakened plane joints shall be done usua_____

Answer: Within 24 hours


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216. Removal of forms of concrete pavementAnswer: 24 hours

217. The required slump of concrete using slip form method ofpaving is _____

Answer: 1 inches

218. Deficiency in strength of concrete specimen wherein no

payment of contract price allowed is _____Answer: 25% or more

219. What is the length of a lot of pavement when a single trafficlane is poured?

Answer: 1,000 ln.m

220. What is the length of a lot of pavement when two lanes laneare poured concurrently?

Answer: 500 ln. m

221. What is the required size of concrete beam sample?Answer: 150 mm x 150 mm x 525 mm

222. What is the required number of set of concrete beamspecimens to be taken from each 330 sq. m of pavement offraction thereof placed each day?

Answer: 1 set

223. What is the required compressive strength that concrete pilesbe moved?

Answer: 80% of the designed 28 day compressive

strength224. The required circular pin diameter used to bend 10 20 mm

reinforcing steel.Answer: 6d (20 mm 25 mm = 8d: 28 mm and above

= 10d)

225. The mixing speed of the transit mixer during batching.Answer: 4 to 6 rpm

226. What is the slump of concrete Class A deposited in waterAnswer: 10 to 20 cm

227. This item shall consist of preparing and treating an aggrebase course preparatory to the construction of a bitumisurface course.

Answer: Prime Coat

228. What item no. is Bituminous Surface Treatment?Answer: Item 304

229. What is the required tolerance for bituminous material in mix formula for Item 310?

Answer: 0.4%

230. This item consists of an application of bituminous matwith or without the application of aggregate on exbituminous surface?

Answer: Seal Coat

231. Job mix tolerance for temperature in the mixture for 310.

Answer: 10C

232. What is the size of the sample in Item 310 taken for eachdays operation?

Answer: 150 mm x 150 mm or 100 mm

233. What is the required temperature of mix in item 310 w

placed?Answer: 107C

234. The required speed in rolling in Item 310.Answer: 5 kph


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235. It is the resulting difference in elevation across a joint orcrack.

Answer: faulting

236. In core specimen asphalt mix thickness determination, it shallhave a diameter of at least ______

Answer: 100 mm

237. In batching concrete mix, the accuracy of cement content

shall be _____Answer: 1.0 mass %

238. Minimum thickness measured perpendicular to the slopeusing Class D stones for riprap.

Answer: 800 mm (Class A 300 mm; Class B 500 mm;Class C 600 mm)

239. This item shall consist of preparing and bearing an existingbituminous or cement concrete surface with bituminousmaterials preparatory to the construction of bituminoussurface course.

Answer: Tack Coat

240. What is the rate of application of bituminous seal coat usingasphalt cement?

Answer: 0.9 to 1.8 lit/m2

241. What is the rate of application of bituminous seal coat usingcut back asphalt?

Answer: 1.5 to 3.0 lit/m2

242. What is the maximum tolerance of the variation of the surface

of Item 310 from thetesting edge of the straight edge

between any two contacts with the surface?Answer: 6 mm

243. What is the minimum dry compressive of Item 310?Answer: 1.40 MPa

244. What is the required Index of Retained Strength of Itemwhen tested by AASHTO T 65?

Answer: 70% minimum

245. Job mix tolerance in Item 310 for grading, passing No. 4larger sieve.

Answer: 7

246. Job mix tolerance in Item 310 for grading, passing No

No. 100 (inclusive).Answer: 4

247. .Job mix tolerance in Item 310 for grading, passing Nosieve.

Answer: 2

248. The property of asphalt mix to resist deformation imposed load.

Answer: stability

249. The property of asphalt mix to resist the detrimental ef

of air, water, temperature and traffic.Answer: durability

250. The property of asphalt mix to withstand repeated flecaused by the passage of wheel loads.

Answer: fatigue resistance

251. The property of asphalt mix to bend slightly without cracand to conform to gradual settlements and moments obase and subgrade.

Answer: flexibility

252. The range of aggregates composition in Item 310.Answer: 92% to 95%

253. What is the test on asphalt in order to determine the effewater on the cohesion of the mix?


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Answer: Immersion Compression Test

254. In temperate countries like the Philippines, what is the mostcommonly used grade of asphalt cement?

Answer: 60 70 and 85 100

255. To determine the thickness _____ of asphalt, Immersion Compression Test is performed.

Answer: stability

256. Percent air voids will _____ as percent asphalt increases inMarshall Stability.

Answer: decrease

257. To determine the temperature of delivered asphalt mix, whatapparatus is used?

Answer: armored thermometer

258. Peat and muck soils are considered as:Answer: highly organic soils

259. Why is it that a trial section is conducted in sub base orbase course construction?

Answer: to check the suitability of materials, efficiencyof the equipment used and the construction method.

260. What does it mean when there is bleeding in a newly pavedasphalt road?

Answer: excessive asphalt content

261. A good subgrade soil should have the following:Answer: low liquid limit and low plastic limit

262. Concrete samples may be tested at an earlier stage in orderto _____

Answer: determine the trend of its strengthdevelopment

263. What is the test criterion for reinforced concrete pipe tein a three edge bearing test machine?

Answer: 0.3 mm crack

264. In testing concrete cylinder sample, the applied load shbe continuous without shock at a constant rate withinrange of _____

Answer: 20 to 50 psi/second (compression); 125 psi/second (flexural)

265. Cement which has been in storage for a long period of and that there is already doubt as to its quality should:

Answer: be retested prior to use

266. It is a process of improving the properties of soil to mamore suitable for a particular purpose.

Answer: Stabilization

267. Two tests are done in one lot sample. The test differs each other, third test is taken. What will be this test?

Answer: referee test

268. If no beam sample taken to determine the strengtconcrete pavement, is it allowed in DPWH specs to use samples to determine the strength. What is the reqcompressive strength?

Answer: Yes, 3,500 psi at 14 days

269. Tact coat must be at what condition prior to the applicatiasphalt mix?

Answer: tacky

270. The use of sea water in reinforced concrete may _____Answer: induce risk of corrosion in reinforcing steel

271. Subgrade having a CBR value of 2% or less is consid_____

Answer: weak subgrade


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272. Subgrade having a CBR value of 15% or more is considered_____

Answer: very stable

273. Subgrade other than those defined in the two abovecategories is considered ___

Answer: normal

274. What are the three (3) major groups of soil?Answer: granular soil, fine grained soil, organic soil

275. What is the significance of field density test?Answer: to determine the degree of compaction of soil.It is also a control test in embankment construction toensure adequate compaction.

276. Weighing hot sample is not advisable because it affects theaccuracy of the result. True or false?

Answer: true

277. How to prepare or to come up with an air dried sample?Answer: air dry the sample under the heat of the sun

278. If it is impossible to air dry the sample under the heat of thesun, what alternative should be used?

Answer: oven dry the sample @ 60C

279. Sample for compaction test should pass to what sieve size?Answer: Method A & B use sample passing No. 4

Method C & D use sample passing inch

280. What is the difference between T 99 and T 180compaction test method?

Answer: T 99 uses 2.5kg (5.5lbs) rammer with a drop while T 180 uses 4.54 kg (10lbs) rammer wit18 drop.

281. What is particle size analysis?Answer: It is the determination of particle distribution in soils by sieve, hydrometer or a combanalysis

282. What kind of water shall be used in laboratory test espeif it deals with chemicals?

Answer: distilled water

283. Liquid limit brass cup w/ sample is raised and allowed to sharply on the base through a height of _____?

Answer: 10 mm

284. How many rotations per second will the crank of a liquid be rotated?

Answer: 2 rps

285. In doing a plastic limit test, to what will the soil thbegin to break?

Answer: 3.2 mm (1/8)

286. What is specific gravity?Answer; It is used in a gravimetric volumrelationship in soils (or defined as the ratio of the wair of an equal volume of water at a stated temperat

287. What is the approximate area for density control strips?Answer: 335 sq. m

288. What Item of work is embankment?Answer: Item 104

289. What kind of material for Item 200?Answer: Aggregate sub base course


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305. How to compute the flexural strength of concrete beam

sample tested at center point?Answer: R = 3PL

2bd2

306. What is the size of the tamping rod used is samplingconcrete?

Answer: 16 mm and 610 mm long with the tamping

end rounded to a hemispherical tip of the same as therod.

307. Concrete masonry (hollow blocks) if subject to test, how manysamples are required?

Answer: 6 pcs/10,000 units (12 pcs if more than 10,000units)

308. What is the strength requirement for load bearing concretemasonry units?

Answer:Individual = 5.5 MPa (800 psi) minimumAverage (for 3 samples) = 6.9 MPa (1000 psi)

minimum

309. What is the strength requirement for non load bearingconcrete masonry units?

Answer:Individual = 3.45 MPa (500 psi) minimumAverage (for 3 samples) = 4.5 MPa (600 psi)

minimum

310. What is the significance of testing reinforcing steel bars?Answer: To determine the yield and tensile strength ofthe bar as well as its elongation and is used to classifythe bars into grade.

311. What is the significance of bending test for RSB?Answer: To evaluate the ductile properties of RSB

312. What is the required testing requirement for paints? Answer: 1 can (gal or pail)/ 100 cans (gal or pail)

313. SS l or SS lh is what kind of asphalt?Answer: slow setting emulsified asphalt

314. For how many hours or how long shall a bituminous pcoat be left undisturbed?

Answer: 24 hours

315. What kind of asphalt is used as tack coat?Answer: cut back asphalt

316. One (1) set of concrete cylinder sample shall be takeevery how many pieces of RCCP?

Answer: 25 pieces

317. What is being determined in a core sample from as

pavement?Answer: thickness and density of pavement

318. All records regarding quality control such as accomplishmdaily activities, weather, etc. are recorded in a _____

Answer: Materials logbook

319. The Standard Penetration Test (SPT) is an in situ testmeasures what?

Answer: depth of soil layer

320. The main problem associated with wrong practicconveying concrete is called _____

Answer: segregation


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321. A one lane road with a pavement width of 3.5 m andshoulder width of 0.5 m on each side of the pavement wasdesigned to have subbase and base courses with a combinedthickness of 300 mm. If the thickness of the subbase is 125mm, the spreading and compaction of the base and subbasecourses shall be carried out in _____?

Answer: three (3) layers over the full width of 4.5 m

322. During the application of the first half of the anticipated load

a _____ rate of loading shall be permitted?Answer: higher

323. Quality of factory produced RCCP may be best establishedthrough what?

Answer: Test of concrete pipe samples

324. Soft and unstable soils were encountered during the course ofsubgrade preparation. If you were the ME assigned to theproject, what is the most effective and cheaper method thatyou would recommend to stabilize the soil prior to theconstruction of the subbase course?

Answer: geotextiles

325. How many times per layer should a concrete specimenmolded in a 6 x 6 x 21 beam mold be rodded?

Answer: 63 blows/layer

326. Rolling of bituminous mix shall be discontinued whenever itbegins to produce excessive _______ or _______.

Answer: pulverizing of the aggregate, displacementof the mixture

327. In placing concrete, the required temperature should be lessthan ____

Answer: 29C

328. How many concrete cylinder samples is required for a 300 pcsRCCP?

Answer: 12 sets

329. If concrete cylinder is not available for a 300 pcs RCCP,many pipes shall be subjected to test?

Answer: 6 pcs RCCP

330. If there is a necessity to add water to the concrete morder to increase its workability (provided concrete doeexcced specified slump), how many minutes after the itime of mixing does adding water be permitted?

Answer: not exceeding 45 minutes and that watcement ratio is not exceeded.

331. What are the two (2) types of bitumen that are commused in the bituminous mixture?

Answer:TAR is a viscous liquid obtained from the distillati

coal or wood.PETROLEUM ASPHALT are the products o

distillation of crude oil.

332. What are the three (3) major petroleum asphalts?Answer: Asphalt cement, cut back asp

emulsified asphalt

333. What are the solvents of cut back asphalts?Answer:

GASOLINE for rapid curing typeKEROSENE for medium curing typeDIESEL for slow curing type

334. Emulsified asphalts are either _____ or _____.Answer:


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CATIONIC EMULSION works better with wetaggregates and in cold weather. It is apositively charge electron.

ANIONIC EMULSION - adheres better toaggregates which have positive charge. It is a negativelycharge electron.

335. What is the bituminous material used in Item 310? Answer: asphalt cement

336. What greatly affects the service of asphalt cement?Answer: grade and quantity of asphalt

337. What influences primarily the grade of asphalt selected?Answer: climatic condition

338. How many weeks do the producer of asphalt mix or thecontractor shall submit the job mix formula?

Answer: three (3) weeks

339. Who will approve the job mix formula?

Answer: DPWH PE and ME

340. The job mix formula contains provisions the following:Answer:

10.grading of aggregates11.percentage and type of asphalt12.temperature of aggregates and asphalt13.temperature of mixture upon delivery or time of

compaction

341. When tar is used, what is the temperature that the mixtureshall be placed?

Answer: 66C to 107C

342. When is the right time to compact in order to attain therequired density?

Answer: when the mixture is still hot and workable

343. What is to be done in order to determine the numbpasses that would attain the required density?Answer: trial section

344. What needs to be controlled during the mixing compaction and is of great significance in the strength oresulting pavement?Answer: temperature

345. In Item 310, how is rolling be done?Answer: It should begin from the sides and prolongitudinally parallel towards the center line, eachoverlapping one half the rollers width.

346. After the final rolling, what will be checked?Answer: degree of compaction

347. The compacted pavement shall have a density equal greater than _____Answer: 95% of the laboratory compacted density

348. When will the traffic be permitted to utilize the pavemenAnswer: when the pavement has cooled to atmosphtemperature

349. How do we take sample from the finish pavement?Answer: by the use of core drill or saw

350. What is the allowable slump of a workable concrete ivibrated?Answer: 40 mm 75 mm

351. What is the allowable slump of a workable concrevibrated?Answer: 10 mm 40 mm

352. When concrete is mixed in a central mixing plant, what itime of mixing?


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Answer: not less than 50 seconds or more than 90seconds

353. In transporting concrete, what is the time elapsed from thetime water is added to the mix until the concrete is depositedin place at the site?Answer: It shall not exceed 45 minutes if hauled in non agitating trucks and 90 minutes if hauled in truckmixers or agitators

354. How is concrete consolidated?Answer: by the use of vibrator inserted in the concretevertically355. If the lanes are concreted separately, what kindof joint in a form of a keyway is used?Answer: longitudinal construction joint

356. What kind of bar is placed perpendicular to the joint stated inthe preceding problem?Answer: deformed steel tie bars

357. What is the depth of the weaken plane joint when sawed witha concrete saw?

Answer: not less than 50 mm

358. The width of the weaken plane joint is _____Answer: not less than 6 mm

359. What shall be done if cracks appear at or near the joint priorto the time of sawing?

Answer: sawing shall be omitted

360. Tie bars shall not be coated or painted with _____Answer: asphalt or other materials

361. What is the material that is used as a load transfer deviceheld in a position parallel to the surface and center line of theslab of pavement?

Answer: dowel

362. To protect dowels from corrosion and to facilitate slidiconcrete, it shall be coated with _____

Answer: thin film of bitumen

363. The surface of the pavement shall be roughened by mea_____

Answer: brooming

364. What is the depth of corrugation produced by broominthe surface of the pavement?

Answer: 1.5 mm

365. The surface of a newly put concrete when has sufficientlshall be cured for a period of _____

Answer: 72 hours

366. The curing of the pavement is done by means offollowing:

Answer:

14.by covering the concrete with mats saturated water

15.by thoroughly wetting the pavement16.by ponding17.by applying curing compound immediately a

finishing of the surface

367. When is the right time to seal the joints?Answer: after the curing period or before

opened to traffic

368. What is the difference between Item 504 and Item(bluebook 95)?

Answer: the placement of stone or boulders andratio of cement and fine sand

369. The ME of the contractor is directly under the supervisithe _____?


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Answer: Materials Engineer of the DPWH

370. The requisites in transporting samples of the laboratory is_____

Answer: Well packed in durable containers to avoiddamages in transit, accompanied by a sample card filledup in detail and duly signed by the ME

371. Who has the power to recommend the acceptance or

rejection of construction materials for use in the projectbased on test results?Answer: Materials Engineer of the DPWH

372. It is a chemical composition of asphalt that gives color andhardness.Answer: asphaltene

373. The mineral filler which is used in the bituminous mix ispassing sieve?Answer: No. 200

374. Cold mix asphalt is used in _____Answer: pothole patching

375. VMA meansAnswer: Voids in Mineral Aggregates

376. The compaction temperature in molding the bituminousmixture specimenAnswer: 124C

377. The mixing temperature of bituminous mix isAnswer: 163C

378. The heating temperature of bituminous mix isAnswer: 121C - 188C

379. The heating temperature of aggregates ranges from

Answer: 177C - 191C

380. The maximum absorption content of CHBAnswer: 240 kg/m3

381. The maximum moisture content of CHBAnswer: 45%

382. SPT meansAnswer: Standard Penetration Test

383. A tube sampler is used in sampling undisturbed sampleAnswer: Shelby tube

384. Used in sealing undisturbed sampleAnswer: wax

385. A tube sampler used in sampling disturbed sampleAnswer: split spoon sampler

386. It is a dynamic test used in the field to obtain rapid empresults which can be used to estimate shear strengthbearing capacityAnswer: Standard Penetration Test

387. A type of coring bit used in rock coringAnswer: diamond bit

388. CQCA meansAnswer: Certificate of Quality Control Assur(submitted weekly)

389. The specific gravity of asphalt ranges fromAnswer: 1.01 1.04

390. The type of electron present in rapid curing emulasphalt?Answer: cationic


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391. How many group of three in situ densities are required ifthe compacted volume of embankment laid was estimated tobe 1,500 cu. m with a thickness of 200 mm/layer?Answer: fifteen (15)

392. The allowable % variation in mass of deformed reinforcingsteel isAnswer: 6% maximum under nominal stress

393. The maximum allowable % phosphorous content of adeformed and plain billet steel bar isAnswer: 0.06%

394. Tensile and yield strengths of steel bars?Answer:

TENSILE STRENGTH YIELD POINT

GRADE 40 483 MPa 276 MPaGRADE 60 621 MPa 414 MPaGRADE 75 689 MPa 517 MPa

395. Plasticity index is an indication of percentAnswer: clay content

396. The condition of the soil to be tested in the laboratorycompaction test isAnswer: air dried condition

397. The method in the determination of density of soil in placeAnswer: Sand cone method

398. Air dry sand used in the density apparatus is passingAnswer: sieve No. 10 retained No. 200

399. Which of the following items does not need CBR?Answer:

18. subbase materials19. surfacing materials20. base course materials

400. In abrasion test, the abrasive charge shall consist of ciron spheres or steel spheres.

Answer:GRADING A 12 spheresGRADING B 11 spheresGRADING C 8 spheresGRADING D 6 spheres

401. In truck mixing, the minimum number of revolutions afteingredients including water is in the drum isAnswer: 100 rpm

402. A maximum time of _____ shall be permitted for wet milay down and finishing when this method is used (Item 206)

Answer: two (2) hours

403. Traffic shall be prohibited from traveling at the speeexcess of _____ until the asphaltic material has set.

Answer: 40 kph

404. Mortar shall be used within _____ after its preparationAnswer: 90 minutes

405. In placing concrete for slab, using buggies, the comethod that should be followed is

Answer: concrete should be dumped into the facthe previously placed concrete.

406. There is a failure of flexural strength in the pavement, ifare the ME of your firm, what will you recommend?

Answer: conduct recoring

407. When loads have been arriving at the spreader withmaterial peaked or doomed up and a load suddenly appeawhich the material lies flat, it indicates

Answer: excessive asphalt


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408. Where and when was the first use of Portland cement?Answer: Bellafontaine, Ohio (1893)

409. The curve in the logarithmic scale where the 25 th blow isprojected in order to determine the liquid limit of the soil.

Answer: Flow curve

410. Percentage of wear represents the value of _____Answer: abrasion loss

411. In the design of concrete mix, what is the volume of water inthe concrete mix that produces a slump of 76.2 mm?

Answer: 24.7 liters

412. The standard fineness modulus of sand is about _____Answer: 2.75

413. The standard packaging weight of cementAnswer: 40 kg/bag

414. It is an impervious membrane applied to concrete pavement

before its initial setting that prevents rapid evaporation of waterfrom the mix.

Answer: curing compound

415. The type of paint that is used for zone marking, traffic lanesand parking spaces which is rapid drying, resistant to abrasionand weather conditions and possess improved visibility at night.

Answer: reflectorized paint

416. An ingredient in the paint that gives reflection during nighttime.

Answer: glass beads

417. The paint which is used on concrete or masonry units.Answer: Latex

418. The average loss in weight of three specimens in zinc cotest.

Answer: Triple spot test

419. One the three specimens in the triple spot test with ligcoating.

Answer: Single spot test

420. The type of paint that is used in wood surfaces. It is a sp

type of paint made with varnish as the vehicle.Answer: Enamel

421. Group index is an empirical number ranging from 0 tunder average conditions of good drainage and adeqcompaction. The supporting value of a material as subgradebe assumed as an inverse ratio to its group index, that is a gindex of zero indicates

Answer: good subgrade material

422. It determines the target density which is constructed a

beginning of the work on each course of material tocompacted.

Answer: Control strips

423. The instrument used in placing concrete in water compact mass in its fina position.

Answer: tremie with 250 mm

424. The maximum specific gravity of thermoplastic paint.Answer: 2.15

425. The softening point of a thermoplastic paint.

Answer: 102.5C

426. The maximum drying time of thermoplastic paint.Answer: 10 minutes

427. The rate of application of traffic paint.


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449. If the coarse aggregates are subjected to five cycles ofsodium sulfate soundness test, the weighted loss shall not exceed

Answer: 10 mass %

450. If the fine aggregates are subjected to five cycles of sodiumsulfate soundness test, the weighted loss shall not exceed

Answer: 12 mass %

451. Additives used in concrete mixing.

Answer: admixtures

452. The test that determines the resistance of aggregates todisintegration by saturated solutions of sodium sulfate ormagnesium sulfate.

Answer: Soundness test

453. The design of concrete mix specified in the bluebook isbased on

Answer: Absolute Design Method

454. The initial setting time of Portland cement is not less than

Answer: 45 minutes

455. The final setting time of Portland cementAnswer: 10 hours

456. The standard sand used in testing the mortar strength ofPortland cement

Answer: Ottawa sand

457. The apparatus used to determine the fineness of Portlandcement by air permeability

Answer: Blaine Air Permeability Apparatus

458. A mixture of cement and water isAnswer: cement paste

459. The apparatus used to determine the initial and final seof Portland cement in the laboratory.

Answer: Gillmore needle

460. The compressive strength of cement mortar samplesdays is

Answer: 19.3 MPa

461. What is the appearance of the molded cement paste w

fails to meet the autoclave?Answer: crumbled

462. The critical number of days of curing of concreteAnswer: first seven (7) days

463. It is the equally as important as testing, and the samshall sue every precaution to obtain samples that will shownature and condition of the materials which they represent.

Answer: sampling

464. A soil sample received from the field for subsequent tes

reducing aggregations of particles into sizes which will certain sieves.

Answer: disturbed samples

465. A procedure to recover relatively undisturbed soil samsuitable laboratory tests of structural properties.

Answer: thin walled tube sampling

467. The representative who will witness the testing of matein an accredited laboratory.

Answer: government

468. Samples obtained from the field with minimum disturbby using any drilling equipment that provides clean hole beinsertion of thin walled tubes that is, both the natural deand moisture content are preserved as much as practicable.

Answer: undisturbed samples


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469. The type of additive that is used to delay the setting of freshconcrete.

Answer: retarder

470. The type of additive that is used to attain maximum earlycompressive strength of concrete.

Answer: accelerator

471. The best enemy of construction.

Answer: water472. The following are considered unsuitable materials:

Answer:21.Materials containing detrimental quantities of organic

materials such as grass, roots and sewage22.Highly organic soils such as peat and muck23.Soils with LL exceeding 80% and/or PL exceeding 55%24.Soils with a natural moisture content exceeding 100%25.Soils with very low natural density, 800kg/m3

26.Soils that cannot be properly compacted as determinedby the engineer

473. What is the spec of mass % passing in sieve No. 200,grading A for aggregate base course?

Answer: 0 12%

474. The rate of application of special curing agentAnswer: 4 liter per 14 sq. m

475. The method of measurement for determining the depth ofthe river channel.

Answer: sounding

476. If the type of soil in Item 200 is non plastic, what Atterberglimit test can be performed?

Answer: Liquid limit test

477. The minimum penetration of the preservatives into thesurface of timber is

Answer: 20mm

478. The engineer shall be notified at least _____ beforetreating process of timber.

Answer: 10 days

479. All grout shall pass through a screen with a _____ maxiclear opening.

Answer: 2mm

480. The allowable height of fall in driving piles to avoid iusing gravity hammer.

Answer: 2.5m 3.5 (concrete)4.5m (timber)

481. This increases the shearing strength of aggregates ofsize, shape and gradation.

Answer: Compaction

482. In general, soils high value of this and plasticity indexpoor as engineering materials.

Answer: liquid limit of fines

483. The recommended thickness of Hot Mix asphalt ovdepending on the expected traffic and the modulus ocracked and seated pavement section.

Answer: 3 to 5

484. Stabilization and under sealing are recommended ifmean deflection is ____ or the differential deflection is ____

Answer: greater than 0.14, greater than 0.002

485. Super plasticizers can reduce the water content by _____

increase the 24 hour strength by _____.Answer: 25% to 35%, 50% to 70%

486. Loose material is removed from all joints, cracks and athat have previously patched by asphalt by _____ with nom_____ air pressure.

A i d i bl i 100 i


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Answer: power sweeping and air blowing, 100 psi

487. Admixtures which can help incorporate a controlled amountof air on the form moist in concrete during mixing withoutsignificantly altering the setting or the rate of characteristic ofconcrete.Answer: air entraining admixtures

488. It is the activity of monitoring planned scheduled against

actual and by speed task to make up for the past or futureloss of time.Answer: Delivery control

489. Bowl shaped holes of various sizes in the pavementsurface.

` Answer: potholes

490. A form of plastic movement typified by ripples (surfacewaves) across the pavement.Answer: corrugation

491. A form of plastic movement resulting in localized bulging ofthe pavement.Answer: shoving

492. Longitudinal surface depression in the wheel paths.Answer: rutting

492. It is the chief load bearing of gravel road?Answer: base or subbase course

493. The maximum distance of the discharge point from the point

of deposit by pneumatic means.Answer: 3 meters

494. It reduces the vertical compressive stress induced by trafficin the subbase and subgrade.Answer: base course

495. Minimum separation of splices when staggered.Answer: 40 times bar

496. Consist of furnishing, placing and finishing concrete structures except pavements conforming to the lines, gand dimension.Answer: Structural concrete

497. Minimum grouting pressure of bonding tendons.Answer: 0.6984 MPa (100 psi)

498. The main cross member of Bailey bridge that carryroadway structure.Answer: transom

499. Coring sampling shall be done at _____ interval by usingspoon sampler and the depth needed is _____.Answer: one (1) meter, 30m

500. What is the diameter of split spoon sampler?

Answer: 50mm

501. The uniform sampling run in core drilling.Answer: 1.50m length

502. The initial diameter of bore hole. Answer: 76mm

503. What is the core bit diameter?Answer: 67mm

504. The required spacing of bore holes along centerline of r

for 300 VPD traffic.Answer: 250m (1.5m below subgrade)

505. The required spacing of bore holes along centerline of rfor less than 300 VPD traffic.Answer: 500m (along centerline)


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506. The required spacing of bore holes along centerline for newroad on swampy or marshy ground.Answer: 100m (2m along the centerline of new road)

507. The required spacing of bore holes for bridge projectAnswer:

1 deep drill for each abutment (30m run)1 boring for each pier for multi span (3m

into the bed rocks)508. The required spacing and depth of bore holes over

foundation area of dam.Answer: 60m spacing, 30m intermediate alongcenterline

Depth = times base width

509. For ports and harbors projects:Answer: 30m to 150m; 1m below dredged bottom (12mminimum for piers & wharves)

510. For buildings (large area greater than 930 m2

):Answer: 1 bore hole at each corner of the structure andone on the interior (9m below lowest foundation)

511. For buildings less than 930 m2

Answer: two (2) boring at opposite corners

512. This reflector shall be the short type having a minimumbase area of 180mm x 140mm.Answer: Flush Surface Reflector

513. Occurs on PCCP when the cutting of weakened plane is

delayed.Answer: shrinkage cracking

514. What is the primary purpose in establishing design criteriain design?Answer: consistency

515. Positional tolerance of duct tubes during casting operatAnswer: 4mm

516. This method is usually adopted when there is no vievidence of termite infestation.Answer: Cordoning

517. This method is used when soil shows termite infestation

Answer: Drenching518. Moisture content of rough lumber should not exceed ___

Answer: 22%

519. Moisture content of dressed lumber should not exceed _Answer: 14%

520. Design pressure of glass in glazed position.Answer: 244 kg/m2

521. The minimum pressure of testing water tank.

Answer: 1,033.50 KPa

522. The minimum energy per blow of diesel hammeconcrete/steel pile at each stroke.Answer: 831.48 kg/m

523. The minimum distance allowed for the top portion osplice below ground line or seabed.Answer: 2.5 meters

524. Consist of the excavation of river beds, bottom of creeesteros and other bodies of water.

Answer: dredging

525. The slope of batter pilesAnswer: 1:6

526. Longitudinal gutter grades shall not be flatter than ____


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543 The DPWH specs provide tolerance for asphalt 551 The dividing line between gravel and sand in con


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543. The DPWH specs provide _____ tolerance for asphaltpavement thickness

Answer: - 5mm

544. Geosynthetics may be used forAnswer: filtration or drainage, reinforcement,

erosion control

545. Which of the ff. is not included in determining moisturecontent?

Answer:35. beam balance36. oven37. moisture can38.extruder

546. Steel bars are considered undersize ifAnswer: its nominal diameter as determined by caliperdoesnt meet the manufactured size

547. Samples of aggregates for base course when tested forquality the requirements

except grading. What will you recommend?Answer: reprocess the materials by blending

548. Concrete curing refers toAnswer: procedure done to maximize concrete strength

549. What is the most inferior type of soil as to its engineeringproperties?

Answer: organic

550. What is the testing soil that involves the application ofenergy and addition of water as lubricant?Answer: Moisture Density relation test

551. The dividing line between gravel and sand in conpavement isAnswer: No. 10

552. What is the volume of the mold using 6 for AASHTO T D method in compaction test?Answer: 0.002124 m3

553. A material resulting from the disintegration, grindincrushing of rock and which will pass 2.00mm sieve anretained on the 0.075mm sieveAnswer: sand

554. What is ASTM?Answer: American Society for Testing & Materials

555. What is AASHTO?Answer: American Association of State HighwaTransportation Officials

556. DPWH thru Bureau of Research & Standards has prepar

revised laboratorytesting procedure manual, in order to have be consistentthe latest methods as prescribed under

Answer: ASTM & AASHTO

557. What is the category of contractor that are requireDPWH to have laboratory equipments or apparatus in bidding qualifications?Answer: large

558. What is the maximum size of aggregate used in Item 10

Answer: of the thickness

559. What kind of material that passes .001mm sieve?Answer: colloids

560 In soaking sample for CBR the water should at least 570 Controlled Density Method in embankment constru


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560. In soaking sample for CBR, the water should at least _____above the specimenAnswer: 25mm

561. A natural or prepared mixture consisting predominantly ofstone, gravel or sand and containing silt clay materialsAnswer: soil aggregates

562. A rock fragment usually rounded or semi rounded with anaverage dimension between 75mm 305mmAnswer: boulders

563. The process of cutting the branches around a tree on theroadside to make them denser and grow straight.Answer: Pruning

564. The road near or abutting a bridge.Answer: Approach

565. Settlement of right of way problems should be doneAnswer: before the construction work

566. Material that has the greatest load carrying capacityAnswer: sand and gravel

567. In hydrographic survey, sounding joints should be made at amaximum interval of

Answer: 20 meters

568. The use of geofabric material to increase the strength of thesubgrade

material for road construction is classified asAnswer: Soil Reinforcement Method

569. What to recommend if the surface test of newly asphaltedwhich showed a lump

Answer: remove and replace the pavement areawith irregularity

570. Controlled Density Method in embankment construinvolves

Answer: Depositing and spreading materials in laof not more than 225mm depth, loose materials extending to the full width of the embankment

571. What type of cracks will appear on concrete if it wascured immediately after final placement especially duringfirst seven days?Answer: Plastic shrinkage cracks

572. What is commonly used as curing media for fresh concrAnswer: Liquid membrane forming

573. What is the work sequence on cylinder specimen?Answer: cylinder shall be prepared, cured and testethe specified date

574. When to remove the false work of continuous structure?Answer: when the 1st and 2nd adjoining span on eside have reached the specified strength

575. It is generally either a soft soil composed largely of silt, organic deposit or loose sand having high void ratherusually not high water contentAnswer: Weak Subgrade

576. What is Twelve Inch Layer Method Embankment?Answer: the material shall be deposited and sprealayers not more than 300 mm in depth (12) lomeasure, parallel to the finished grade and extento the full width of the embankment

577. What is Rock Embankment Method? Answer: the material shall be deposited on the fill

push over the end of the fill by means of bulldoThis method is only applicable to fill 1.2 m in deIt shall not be placed within 600 mm of the other gr

578. What is Hydraulic Fill Method Embankment? 585. Occurring usually at the transverse cracks joint cause


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578. What is Hydraulic Fill Method Embankment?Answer: the material shall be taken from borrowlocations and shall be deposited so as to form thegrade and cross section and shall be thoroughlycompacted

579. What is the principal factor used in determining thethickness of the pavement?Answer: STRENGTH OF SUBGRADE (deterioration due tofrustration move also be considered)

580. What is Placing and Removing Surcharge MethodEmbankment?Answer: were unsuitable material is present under theembankment corrective work consists of placing asurcharge constructed to the full width of the road bed.The surcharge shall remain in place until theembankment has reached stability or the requiredsettlement

581. What is Hydraulic Construction Method Embankment?

Answer: this involves the introduction of water into theembankment to accelerate consideration

582. Mixture of fine grained aggregates, bituminous binder andwater for surface sealingAnswer: slurry seal (bituminous slurry)

583. What is the formula for percentage of wear?Answer:

Percentage of wear, % = (orig wt. wt.retained @ sieve # 12) x 100

original wt.

584. Free bitumen on the surface of the pavement which createsa shiny, glass like reflecting surface that usually becomesquite sticky

Answer: bleeding

585. Occurring usually at the transverse cracks joint causeexcessive expansion of the slabs during hot weather

Answer: buckling

586. The splitting of concrete surface material from the conpavement

Answer: crushing

587. The authorized hauling of materials in excess of the ofree haul distance

Answer: Overhaul

588. If slurry (wet) lime is employed, what is the typical sratio?

Answer: 1 tonne lime : 2 cubic meter of water

589. What is the amount of cement to be added to theaggregates in Item 204?

Answer: 6 10 mass % of the dry soil

590. Who is the father of Soil Mechanics?

Answer: Dr. Karl Terzhagi

591. What is quality?Answer: It the degree of excellence

592. What is control?Answer: Is to regulate

593. What is quality control?Answer: It is conformance to requirements

594. What is assurance?

Answer: it the degree of certainty

595. What are the two kinds of control activities?Answer: Inspection and Testing

596. What is the minimum distance of water table from subgrade 604. What type of cement is the Moderate Sulphate Resis


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glevel?

Answer: 4 5 feet

597. What is the process of combining two or more soil insuitable properties to produce good grading on gravel, sand,silt and clay?Answer: Mechanic Stabilization

598. What is the common material employed in stabilizing themoisture content of soil or liquid and hydroscope in nature? Itis an aid in the compaction process by slowing the rate ofevaporation of moisture from the soilAnswer: Calcium chloride or rock salt

599. When do clay and granular soils become unstable?Answer: Clay soil becomes unstable if moisture contentincreases. Granular material becomes unstable if it hasdried

600. Why do liquid asphalt was introduced in road construction

aside from asphalt cement?Answer: It was introduced in order to save heatingcosts and from convenience in road mixing or priming

601. The theory of concrete design mix is toAnswer: Optimize aggregate packing and optimizesproperties of cement mortar

602. To optimize the properties of the cement mortar, one has todepend onAnswer: cement type, cement content and watercontent

603. What type of cement is the Ordinary Portland Cement(OPC)?Answer: Type I

yp pPortland Cement?Answer: Type II

605. What type of cement is the Rapid Hardening PorCement?Answer: Type III

606. What type of cement is the Low Heat Portland Cement?Answer: Type IV

607. What type of cement is the High Sulphate Resistant PorCement?Answer: Type V

608. What type of cement is the Portland Blast Furnace Cement?Answer: Type 1S

609. What type of cement is the Portland Pozzolan Cement?Answer: Type 1P

610. Type I is for general use such asAnswer: pavements & sidewalks, buildings & bridand tanks & water pipes

611. Type III cement is used forAnswer: early stripping of forms & high early streng

612. Type IV is used forAnswer: massive structures such as dams

613. Type V cement is used for

Answer: when sulphate content of groundwater is high

614. The inventor of Portland cement wasAnswer: Joseph Aspdin

615. Portland cement is composed of blended materials


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pcontainingAnswer: calcium, alumina, iron and silica

616. The simple recipe of Portland cement isAnswer: 2 parts of crushed limestone, 1 partclay/pulverized shale, 1 pinch of iron ore, then 1 pinchof gypsum added to clinker

617. Pozzolan cement is composed of a raw material calledAnswer: volcanic earth

618. The 75% compressive strength of Portland cement iscomposed ofAnswer: C3S and C2S

619. The 25% setting time of Portland cement is controlled byAnswer: C3A and C4AF

620. When water is added to Portland cement, _____ process isdeveloped

Answer: hydration621. Calcium Silicate Gel (CSH) and lime [Ca(OH)2] are

developed when _____ is added to Portland cementAnswer: water

622. When Portland cement contains a low C3A, it meansAnswer: the setting time is larger

623. Surplus lime [Ca(OH)2] in Portland cement when mixed withwater takes care of the concretesAnswer: alkalinity

624. Coarse aggregates can be taken from Answer: crushed rock, slags and river gravel

625. The water required for concrete mix should beAnswer: fresh water

626. Sea water is deleterious to concrete mix unlesadmixture is added because it containsAnswer: chloride

627. The entrapped air in concrete isAnswer: accidental and unwanted

628. The entrained air in concrete isAnswer: deliberate and desirable

629. We use aggregate in concrete asAnswer: filler materials in concrete

630. Aggregates are important in concrete because they stroinfluence:Answer: the properties of concrete, its mix proporand its economy

631. Which of the following is not deleterious matericoncrete?

Answer:39.calcium

632. Over sanded and under sanded mixture require more wto be workable, but making it so will only resusacrifice in

Answer: strength

633. Concrete in the area represented by the cores wiconsidered adequate if the average strength of the corequal to or at least _____ of the specified strength, fc ansingle core is less than _____

Answer: 85% of fc, 75% of fc

634. Fine aggregate shall be rejected when it fails in the ____organic impurities

Answer: Colormatic Test

646. If a sample can not be weighed within the prescribed


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635. Portland cement may be/shall be rejected if:Answer: it has partially set, it contains lumps of cakecement and it comes from a discarded or used bag

636. A measurement of the coarseness or fineness of aggregatesAnswer: fineness modulus

637. An excess water needed for absorption of coarse aggregatesAnswer: free water

638. What do you mean by SSD?Answer: Saturated Surface Dry

639. A general term relating to the character of a mix withrespect to its fluidityAnswer: consistency

640. More silt and clay content to fine aggregates isAnswer: objectionable

641. Type A admixture is classified by ASTM C494 asAnswer: Water reducing admixture

642. For core specimens, each lot will be divided into how manyequal segments?Answer: five (5)

643. The unit pressure greater than which progressive settlementoccur leading to failureAnswer: bearing capacity

644. The recommended thickness of hot mixed asphalt overlay

Answer: 2

645. In the test to determine the moisture content of samples,the beam balance should be sensitive up to

Answer: 0.1g

after being removed from the oven, it will placed inside aAnswer: dessicator

647. Plastic and finely grain soil will require at least how mhours to dry ay constant weight/massAnswer: 4 hours

648. A sample may be cooled at room humidity and musweighed after it has been removed from the oven within

Answer: 1 hour

649. Drying the material sample in the oven to constant weat a prescribe temperature; the drying time depends onkind of soil and size of sample. A 25-gram sample of samaterial will be dried in aboutAnswer: 2 hours

650. Test conducted for buildings 3 storeys and aboveAnswer: Boring Test

651. A test to determine the moisture content of soilAnswer: calcium tri chloride

652. The aggregate crushing value of strong aggregate isAnswer: low

653. The kind of asphalt used in overlaying seated pavementAnswer: hot mix asphalt

654. The minimum width of paved sidewalkAnswer: 1.5 m

655. The limit of water cement ratio of concreteAnswer: 0.50 0.60

656. A cement which has a cementitious effectAnswer: Portland cement

657. A concrete where compression is induced before theli ti f ki l d th t t i d th l d


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application of working load so that tension under these loadsis reducedAnswer: Pre stressing

658. What laboratory test is used in determining the phosphoruscontent of steel materials?Answer: Phospho - molydate

659. What chemical property in the composition of steel materialthat will cause brittleness or cold shortness when its contentgoes beyond 0.05% to 0.10%

Answer: phosphorous

660. Base or sub base is extended beyond each edge of proposedconcrete pavement

Answer: 0.60 m

661. If you want to adjust the slump and the air content, how doyou it?

Answer:

10 mm slump = 2 kg/m

3

from (water) air entrapment = 3 kg/ m3 of average (water)

662. In non entrained concrete, what is the range of % airentrained?

Answer: 3% - 0.2% (small bigger aggregates)

663. In air entrained concrete, what is the range of airentrained?

Answer: 8% - 3% (small bigger aggregates)

664. For a constant water cement ratio, what will happen if air

content is involved?Answer: the strength of concrete is reduced

665. What will happen if you lower the water cement ratio andmaintaining other values of its ingredients?

Answer: it will acquire strength

666. What is the mixing time of concrete?Answer:

1.5 m3 capacity mixer, T 60 secondsAbove1.5 m3 capacity mixer, T 90 seconds

667. When cement is in contact with moist aggregates, bmade by mix will be disallowed beyond ____

Answer: 1 hours

668. How many hours should an aggregate be washedstockpiled before batching starts?Answer: 12 hours prior to batching shall be stockpor binned for draining

669. When will truck mixing start?Answer: mixing shall begin within 30 minutes u

cement has due added

15 minutes when wet aggregates is used32C temperature is present

670. Concrete delivered by agitation of truck mixer musdischarged within 1 hour or 250 revolutions of the druOlader. Why?

Answer: to avoid over mixing and initial setof concrete

671. In final computation of concrete in road to be paid, whthe maximum size of pipe that is negligible in the vocomputation?

Answer: pipes with of 4 or less

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