CADCAM Laboratory Viva

8/10/2019 CADCAM Laboratory Viva

1/6


2/6

2

2. xpalin the use of sc"e& 9ac$. + t is commonly used to lift hea!y &eights, such as the

foundations of houses, o" la"ge !ehicles.

). xpalin the function of tommy ba" in sc"e& 9ac$.

sho"t ba" put th"ough the shaft of a soc$et spanne" o"box spanne"to p"o!ide ext"a le!e"age.

. List out the pa"ts of sc"e& 9ac$. + 'ommy ba", sc"e&, nut, &ashe", body, cup,

5. xplain the mechanisim a!ailable in sc"e& 9ac$

(c"e& 9ac$ is used in applications &he"e linea" motion is "e7ui"ed. Lifting of any load, pushing

o" pulling of mechanical e7uipment, ad9usting of tight clea"ances of mechanical pa"ts can be

done by sc"e& 9ac$s. Mechanical capacity of sc"e& 9ac$s is bet&een 5$6 and 2;;;$6.


3/6

3

1. =efine. (haft coupling. + Coupling is used to connect the t&o o" mo"e shafts.

2. =efine. ni!e"sal coupling.

Coupling that allo&s pa"ts of a machine not in line &ith each othe" limited f"eedom of mo!ement

in any di"ection &hile t"ansmitting "ota"y motion

). List the applications of uni!e"sal couplings.

i"c"aft, appliances, cont"ol mechanisms, elect"onics, nst"umentation, medical and optical

de!ices, o"dnance, "adio, se&ing machines, textile machine"y and tool d"i!es.

. Lsit the ad!antages of uni!e"sal coupling compa"ing &ith othe" shaft couplings.

1. *"otects d"i!en component by se"!ing as a mechanical >fuse> + an inexpensi!e "eplaceable

plastic midsection shea"s unde" excess load

2. *"otects suppo"t bea"ings by exe"ting consistently lo& "eacti!e fo"ces, e!en unde" la"ge

misalignments ). ?e"o bac$lash and mode"ate to"sional stiffness

5. List the Rigid couplings unsed to coonect the shafts. + Muff coupling, Clamp coupling, Flange

coupling

MAC#INE $ICE

1. =iscuss the applications of Machine !ice . + ="illing, milling, planning

2. Machine !ice body is made up of cast "on. =iscuss. + Fo" hea!y duty machining p"ocess

). =iscuss about s&i!elling type machine !ice.

'he s&i!el !ice is used to mill an angula" su"face in "elation to a st"aight su"face &ithout mo!ingthe &o"$ piece f"om the !ice. n const"uction it may be conside"ed as plain !ice &hich is

mounted on a pa"ticula" base g"aduated in deg"ees. 'he base is clamped on the table &ith the

help of '.bolts.

. List the mate"ials used in Machine !ice fo" !a"ious pa"ts.+ C(' R#6, ML= ('L

5. List the othe" $inds of !ise.

@and !ises, Machine !ises, C"oss Aises, #ff+cente" !ises, ngle !ises, (ine !ises,

S"UFFING BO%

1. =iscuss the function of (tuffing box. stuffing box is an assembly &hich is used to house a gland seal. t is used to p"e!ent lea$age of

11fluid, such as &ate" o" steam, bet&een sliding o" tu"ning pa"ts ofmachine elements.

2. List the types of stuffing box. + @o"i3ontal and !e"tical.

). =iscuss the function of gland in stuffing box.
http://en.wikipedia.org/wiki/Machine_elementhttp://en.wikipedia.org/wiki/Machine_element


4/6


5/6

5

). =iffe"enctiate le!e" safety !al!e and sp"ing loaded "elief !al!e.

Le!e" safety !al!e + !al!e is a de!ice that "egulates the flo& of a fluid gases, li7uids, fluidi3ed

solids, o" slu""ies4 by opening, closing, o" pa"tially obst"ucting !a"ious passage&ays.

(p"ing loaded "elief !al!e + 'he load of the sp"ing is designed to p"ess the >=isc> against the

inlet p"essu"e

. =iscuss the safety !al!e used in boile" mountings

'hese a"e mounted in pai"s to p"otect the boile" against o!e"p"essu"e. #nce the !al!e lifting

p"essu"e is set in the p"esence of a (u"!eyo" it is loc$ed and cannot be changed. 'he !al!e is

a""anged to open automatically at the p"e+set blo&+off p"essu"e.

5. Mention the types of safety !al!e.

Lo&+lift safety !al!e + the cu""ent position of the disc a"ound the d"ain !al!e.Full lift safety !al!e + the "egion of the exemption is not dete"mined by the position of the disc.

NON RE"URN $AL$E

1. =iscuss the applications of 6on "etu"n !al!es !al!es.

*umps, industi"al p"ocess, domestic use

2. xplain the &o"$ing p"inciple of 6on "etu"n !al!e.

non+"etu"n !al!e is a !al!ethat no"mally allo&s fluidli7uido" gas4 to flo& th"ough it in only

one di"ection.). =iscuss the function of safety !al!e.

(afety !al!e o" "elief !al!e: ope"ates automatically at a set diffe"ential p"essu"e to co""ect a

potentially dange"ous situation, typically o!e"+p"essu"e that no"mally allo&s fluidli7uido" gas4

to flo& th"ough it in only one di"ection.

. List out the types of chec$ !al!e.

1. ball chec$ !al!e 2. =iaph"agm chec$ !al!e ). (&ing chec$ !al!e . (top chec$ !al!e 5. Lift

chec$ !al!e

5. Mention the othe" names of 6on "etu"n !al!e.

Chec$ !al!e, clac$ !al!e, one+&ay !al!e

CONNEC"ING ROD

1. =iscuss the function of connecting "od.

Connecting "od is the lin$ bet&een the "ecip"ocating piston and "otating c"an$ shaft.
http://en.wikipedia.org/wiki/Valvehttp://en.wikipedia.org/wiki/Fluidhttp://en.wikipedia.org/wiki/Liquidhttp://en.wikipedia.org/wiki/Gashttp://en.wikipedia.org/wiki/Safety_valvehttp://en.wikipedia.org/wiki/Relief_valvehttp://en.wikipedia.org/wiki/Fluidhttp://en.wikipedia.org/wiki/Liquidhttp://en.wikipedia.org/wiki/Gashttp://en.wikipedia.org/wiki/Valvehttp://en.wikipedia.org/wiki/Fluidhttp://en.wikipedia.org/wiki/Liquidhttp://en.wikipedia.org/wiki/Gashttp://en.wikipedia.org/wiki/Safety_valvehttp://en.wikipedia.org/wiki/Relief_valvehttp://en.wikipedia.org/wiki/Fluidhttp://en.wikipedia.org/wiki/Liquidhttp://en.wikipedia.org/wiki/Gas


6/6

6

2. xplain the Mate"ialused fo" Connecting "od..

'he connecting "ods a"e usually fo"ged out of the open hea"th steel o" sometimes e!en nic$el

steel o" !anadium steel. Fo" lo& to medium capacity high speed engines, these a"e often made of

du"aluminium o" othe" alluminium alloys.

). List out the classification of connecting "od.

'he classification of connecting "od is made by the c"oss sectional point of !ie& i.e. D section,

@ D section, 'abula" section, Ci"cula" section

. =iscuss the function of ma"ine engine connecting "od

Ma"ine engine connecting "od a"e used to p"oduce high po&e" and as such all the pa"ts of the

engine a"e stu"dy and st"ong.

5. =iscuss the funct"ion of small and big end in connecting "od.

(mall end of the connecting "od is connected to the piston by means of gudgeon pin. 'he big end

of the connecting "od is connected to the c"an$shaft.

PIS"ON

+1. =iscuss the function of *iston.

ts pu"pose is to t"ansfe" fo"ce f"om expanding gas in the cylinde" to the c"an$shaft!ia apiston

"odandEo" connecting "od

2. xplain the Mate"ial used fo" *iston "ings.

Cast i"on, Cast i"on alloyed, 6odula" cast i"on alloyed, B"on3e, luminum B"on3e, *hospho"

B"on3e, (teel, (tainless (teels.

). Mention the types of *iston "ings.

Comp"ession Rings: 'he comp"ession "ing is usually placed on the top of the piston head that is

the side of the combustion chambe". ts main function is to seal combustion gases f"om the

combustion chambe"E cylinde" f"om lea$ing do&n into the c"an$case.

#il Cont"ol Rings: 'hese "ings a"e placed at the bottom of the piston f"om, f"om the c"an$ case

side. 'he main function of oil "ings is to cont"ol the amount and economy of lub"icating oil used

in engines.
http://en.wikipedia.org/wiki/Crankshafthttp://en.wikipedia.org/wiki/Piston_rodhttp://en.wikipedia.org/wiki/Piston_rodhttp://en.wikipedia.org/wiki/Connecting_rodhttp://en.wikipedia.org/wiki/Crankshafthttp://en.wikipedia.org/wiki/Piston_rodhttp://en.wikipedia.org/wiki/Piston_rodhttp://en.wikipedia.org/wiki/Connecting_rod

Documents

CADCAM Laboratory Viva