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50 (X)
( 2 )1. 100 m
1.2 kg/m3
. 1200 Pa. . 1200 Pa.
2. 60OC
70 kPa (gage) 70 kPa (Vac.). Cavitation . Cavitation . .
3. 100 30OC 300 kPa (abs.) 200 kPa (gage) 60OC ?. . 330 kPa
(abs.). 600 kPa (gage).
4. . (Critical Pressure)
. 101 kPa () 90OC 30 OC
.
. H2O 30oC
1000 kg/m3
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5.
.
. 1 . . 2
0.1 kg/s6. (H
2O) 30OC, 10 kPa 1 kg/s
50OC, 10 kPa H2O
. 84 kW. 84 kJ. 100 kW.
7. (Heat pump) 1 kW ?
. 1 kW. 1 kW. 1 kW. 1 kW
8. 800 kPa () 200 kPa . . . .
9. 200OC, 400 kPa (Steam Turbine) 50
OC 2 kg/s
. 4,800 kW
. 2,400 kW
. 540 kW.
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10. (Carnot cycle) 25
. . 100% . 1000.
11.
0.03 0.015 -/2
5 2.5 1000 x 2000 4
5 .
2.5 .
= 0.03
= 0.015
1
2
V = 4 /
. 192 . 96 . 48
. 480 12. 0.84
1.5 1 200 . 178 . 222
. 20.6 . 17.8
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13. 2
2
3
water
. 154,095 . 61,638 . 30,819 . 123,276
14. 0.5
690 27 70 /. 43.05 /. 3,116.5 /. 280.49 /. 0.28 /
15. 180
0.005 500
F
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. 7.07 /
. 50 /. 10 /. 20 /
16. 910 /3 7.4 x 10-4 2/ 6.113 / commercial steel 12.5 30
. 253 . 278 . 144.3 . 110
17. 50 56,800
. 47.3 . 2,860 . 56.8 . 464.3
18. 20 10 20 /
2
2
1
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. 222,220
. 308,420 . 288,800 . 120,920
19. 2 1 20/ 14
0.9L
C = 1.23 /3
. 492 . 221.4 . 442.8 . 885.6
20. 30 15 8 / 0.005DC =
8 /. 144 . 576 . 72 . 288
21. S = (1/3)t3 - 2t2 -6 S t t = 0. 0 2. -8 2. -6 2. -4 2
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22. V0 (x = 0 , t = 0)
a = -kv (k = ) v t. v = - kv
0t
. v = - kv0t2
+ v0
. v = v0e
-kt
. v = e-kt /v0
23. = -200 + 8 t2 2 3
. -938.3 . -149.3 . -200 . -298.6
24. V = 2+0.3t2 2 t 2 at. 0.6 2
. 3.6 2
. 1.2 2. 2.3 2
25. c 1.5 2 A 2.0 2 200
. 2 . 2.5 . 20
. 40
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26. A 1.2 2 B 150
54 A BA 72
. VAVB/A
VB
. VAVB/A
VB
. VA
VB/A
VB
. VA
VB/A
VB
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27. 100 1
2 6
. 14.35
. 15.34 . 28 . 30
28. 10 Mg 250 Mg 20
. 5 . 1.27 . 1 . 0.77
29. 400 1.2 250 0.9 . 4.85 . 2.98 . 0.8 . 5.21
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30. 29
. 8.25 . 2.98 . 3.98 . 4.85
31. .
. . .
32. (Parting surface) . . .
. 33.
. turbulence. . .
34. . . . .
35. . ASHRAE
. A.F.S
. SAE. N.F.P.A
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36.
. . . .
37. . .
. .
38. . . .
. 39.
. . . .
40. . 2 . 2 . 2 recycle. 2
41. 80,000 kg CD 50 mm. x 150 mm. Normal Stress ( , )
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. 85 Mn/m2
. 120.6 Mn/m2. 150.4 Mn/m2. 195.3 Mn/m2
42. AB DE G = 77 GN/m2 AB AB 340 N-m (
J
T=
l
G=
r
)
. 2 . 3.5 . 4.38
. 5.25
43. C Clamp P = 400 N B (
I
My
A
P= )
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. 30.5 MN/m2
. - 36.8 MN/m2
. 65.4 MN/m2. - 49.4 MN/m2
44. Pressure Vessel 20 mm. Stress 2.8 MN/m2 (
,t2
Pr=
t
Pr= )
. 20.5 MN/m2. 23.67 MN/m2. 29.63 MN/m2. 31.5 MN/m2
45. I 240 mm. deep Web 20 mm. 120 mm x 20 mm. 160 mm. x 20 mm.
Simple Supported 2 Uniformly distribution Load 6 kN/m2 Stress
70MN/m
2(
Stress in beam
)
. 3 m.. 4.2 m.. 7.625 m.. 8.3 m.
46. Element max
max , min = ( ) [ ] [ ] 22
xy+)y-x(2
1y+x
2
1
. 8.66 MN/m2. 9.84 MN/m2
. 10.86 MN/m2
. 11.34 MN/m2
8 MN/m2
8 MN/m2
5 MN/m25 MN/m
2
3 MN/m2
3 MN/m
2
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47.
. 2 . 2 . 2 . 1 1
48. 7.5 Mw Shear Stress 50 MN/m2
Torque = 750 kN-m l
G=
J
T=
r
. 350 mm.. 380 mm.. 420 mm.. 424.3 mm.
49. 50 mm. 125 mm. 10 50N/mm
2 25 N/mm2
( ). 5 mm.. 10 mm.. 15 mm.. 20 mm.
50. 250 mm. 25 mm. 3 m.
, , Load = 500 kN E= 120 kN/m
2
L
L='
AE
FL=L'
A
F=
. -28.29 N/mm2 , - 235.78 x 10 -6, -0.71 mm.. -23.64 N/mm2 , -
235.72 x 10 -6, -0.71 mm.. 24.30 N/mm2 , -242.00 x 10 -6 , -0.52
mm.. 23.34 N/mm2 , - 242.00 x 10 -7, -0.46 mm.
