POWER PLANT PT.1 · POWER PLANT PT.1 · POWER PLANT PT.1 · POWER PLANT PT.1 · POWER PLANT PT.1 · POWER PL
Choose the letter of the best answer in each 6. Compute the free aperture cross section in m3
question. for the ventilation of a machinery room if the mass
of refrigerant is 9 kg.
1. Find the work possess for a helium gas at 20°C.
A. 0.314
A. 609 kJ/kg B. 0.414
B. 168 kJ/kg C. 0.514
C. 229 kJ/kg D. 0.614
D. 339 kJ/kg
7. A 29.53” x 39.37” pressure vessel contains
2. Two kilogram of gas is confined in a 1 m3 tank at ammonia with f = 0.041. Compute the minimum
200 kPa and 88°C. What type of gas is in the tank? required discharge capacity of the relief device in
kg/hr.
A. Helium
B. Ethane A. 106.71 kg/hr.
C. Methane B. 108.71 kg/hr.
D. Ethene C. 110.71 kg/hr.
D. 112.71 kg/hr.
3. Find the enthalpy of Helium if its internal energy
is 200 kJ/kg. 8. Compute the maximum length of the discharge
pipe installed on an outlet of a pressure-relief
A. 144 kJ/kg device in feet for internal pipe diameter of 0.5 inch
B. 223.42 kJ/kg and rated discharge capacity is 8 lb/min of
C. 333.42 kJ/kg air. The rated pressure of relief valve is 10 psig.
D. 168 kJ/kg
A. 0.286 ft.
4. Compute the mass of a 2 m3 propane at 280 kPa B. 0.386 ft.
and 40°C. C. 0.486 ft.
D. 0.586 ft.
A. 6.47 kg
B. 5.1 kg 9. A thermal power plant has the heat rate of
C. 10.20 kg 11,363 Btu/kW-hr. Find the thermal efficiency of
D. 9.47 kg the plant.
5. Compute the air flow in ft3/min of mechanical A. 28%
ventilation required to exhaust an accumulation of B. 30%
refrigerant due to leaks of the system capable of C. 34%
revolving air from the machinery for a mass of 4 D. 40%
lbs. refrigerant.
10. What is the hydraulic gradient of a 1 mile, 17
A. 200 inches inside diameter pipe when 3300 gal/min of
B. 210 water flow with f = 0.03?
C. 220
D. 230 A. 0.00714
B. 0.00614
C. 0.00234
D. 0.00187
, POWER PLANT PT.1 · POWER PLANT PT.1 · POWER PLANT PT.1 · POWER PLANT PT.1 · POWER PLANT PT.1 · POWER PL
11. Find the loss of head in the pipe entrance if 16. Find the depth in furlong of the ocean (SG =
speed of flow is 10 m/s. 1.03) if the pressure at the sea bed is 2,032.56 kPa.
A. 5.10 m A. 1
B. 2
B. 10.2 m C. 3
C. 17.4 m D. 4
D. 2.55 m
12. Wet material, containing 220% moisture (dry 17. Find the mass of 10 quartz of water.
basis), is to be dried at a rate of 1.5 kg/s in a
continuous dryer to give a product containing 10% A. 10.46 kg
(dry basis). Find the moisture removed in B. 9.46 kg
kg/hr. C. 11.46 kg
D. 8.46 kg
A. 3543.75 kg/hr.
B. 3513.75 kg/hr. 18. Find the mass of carbon dioxide having a
C. 3563.75 kg/hr. pressure of 20 psia at 200°F with 10 ft3 volume.
D. 3593.75 kg/hr.
A. 1.04 lbs.
13. Copra enters a dryer containing 70% moisture B. 1.14 lbs.
and leaves 7% moisture. Find the moisture C. 1.24 lbs.
removed on each pound of solid in the final D. 1.34 lbs.
product.
19. Find the heat needed to raise the temperature
A. 6.258 lbs. of water from 30°C to 100°C with 60% quality.
B. 1.258 lbs. Consider an atmospheric pressure of 101.325 kPa.
C. 4.258 lbs. Use the approximate enthalpy formula of liquid.
D. 2.258 lbs.
A. 293.09 kJ/kg
14. A 1 m x 1.5 m cylindrical tank is full of oil with B. 1,772.90 kJ/kg
SG = 0.92. Find the force acting at the bottom of C. 1,547.90 kJ/kg
the tank in dynes. D. 1,647.29 kJ/kg
A. 106.33 x 103 dynes 20. Find the enthalpy of water at 212°F and 14.7 psi
B. 106.33 x 104 dynes if the dryness factor is 30%. Use the approximate
C. 106.33 x 105 dynes enthalpy formula of liquid.
D. 106.33 x 106 dynes
A. 461 Btu/lb.
15. Find the pressure at the 100 fathom depth of B. 471 Btu/lb.
water in kPa. C. 481 Btu/lb.
D. 491 Btu/lb.
A. 1,793.96 kPa
B. 1,893.96 kPa 21. An air compressor consumed 1200 kW-hr per
C. 1,993.96 kPa day of energy. The electric motor driving the
D. 1,693.96 kPa compressor has an efficiency of 80%. If indicated
Choose the letter of the best answer in each 6. Compute the free aperture cross section in m3
question. for the ventilation of a machinery room if the mass
of refrigerant is 9 kg.
1. Find the work possess for a helium gas at 20°C.
A. 0.314
A. 609 kJ/kg B. 0.414
B. 168 kJ/kg C. 0.514
C. 229 kJ/kg D. 0.614
D. 339 kJ/kg
7. A 29.53” x 39.37” pressure vessel contains
2. Two kilogram of gas is confined in a 1 m3 tank at ammonia with f = 0.041. Compute the minimum
200 kPa and 88°C. What type of gas is in the tank? required discharge capacity of the relief device in
kg/hr.
A. Helium
B. Ethane A. 106.71 kg/hr.
C. Methane B. 108.71 kg/hr.
D. Ethene C. 110.71 kg/hr.
D. 112.71 kg/hr.
3. Find the enthalpy of Helium if its internal energy
is 200 kJ/kg. 8. Compute the maximum length of the discharge
pipe installed on an outlet of a pressure-relief
A. 144 kJ/kg device in feet for internal pipe diameter of 0.5 inch
B. 223.42 kJ/kg and rated discharge capacity is 8 lb/min of
C. 333.42 kJ/kg air. The rated pressure of relief valve is 10 psig.
D. 168 kJ/kg
A. 0.286 ft.
4. Compute the mass of a 2 m3 propane at 280 kPa B. 0.386 ft.
and 40°C. C. 0.486 ft.
D. 0.586 ft.
A. 6.47 kg
B. 5.1 kg 9. A thermal power plant has the heat rate of
C. 10.20 kg 11,363 Btu/kW-hr. Find the thermal efficiency of
D. 9.47 kg the plant.
5. Compute the air flow in ft3/min of mechanical A. 28%
ventilation required to exhaust an accumulation of B. 30%
refrigerant due to leaks of the system capable of C. 34%
revolving air from the machinery for a mass of 4 D. 40%
lbs. refrigerant.
10. What is the hydraulic gradient of a 1 mile, 17
A. 200 inches inside diameter pipe when 3300 gal/min of
B. 210 water flow with f = 0.03?
C. 220
D. 230 A. 0.00714
B. 0.00614
C. 0.00234
D. 0.00187
, POWER PLANT PT.1 · POWER PLANT PT.1 · POWER PLANT PT.1 · POWER PLANT PT.1 · POWER PLANT PT.1 · POWER PL
11. Find the loss of head in the pipe entrance if 16. Find the depth in furlong of the ocean (SG =
speed of flow is 10 m/s. 1.03) if the pressure at the sea bed is 2,032.56 kPa.
A. 5.10 m A. 1
B. 2
B. 10.2 m C. 3
C. 17.4 m D. 4
D. 2.55 m
12. Wet material, containing 220% moisture (dry 17. Find the mass of 10 quartz of water.
basis), is to be dried at a rate of 1.5 kg/s in a
continuous dryer to give a product containing 10% A. 10.46 kg
(dry basis). Find the moisture removed in B. 9.46 kg
kg/hr. C. 11.46 kg
D. 8.46 kg
A. 3543.75 kg/hr.
B. 3513.75 kg/hr. 18. Find the mass of carbon dioxide having a
C. 3563.75 kg/hr. pressure of 20 psia at 200°F with 10 ft3 volume.
D. 3593.75 kg/hr.
A. 1.04 lbs.
13. Copra enters a dryer containing 70% moisture B. 1.14 lbs.
and leaves 7% moisture. Find the moisture C. 1.24 lbs.
removed on each pound of solid in the final D. 1.34 lbs.
product.
19. Find the heat needed to raise the temperature
A. 6.258 lbs. of water from 30°C to 100°C with 60% quality.
B. 1.258 lbs. Consider an atmospheric pressure of 101.325 kPa.
C. 4.258 lbs. Use the approximate enthalpy formula of liquid.
D. 2.258 lbs.
A. 293.09 kJ/kg
14. A 1 m x 1.5 m cylindrical tank is full of oil with B. 1,772.90 kJ/kg
SG = 0.92. Find the force acting at the bottom of C. 1,547.90 kJ/kg
the tank in dynes. D. 1,647.29 kJ/kg
A. 106.33 x 103 dynes 20. Find the enthalpy of water at 212°F and 14.7 psi
B. 106.33 x 104 dynes if the dryness factor is 30%. Use the approximate
C. 106.33 x 105 dynes enthalpy formula of liquid.
D. 106.33 x 106 dynes
A. 461 Btu/lb.
15. Find the pressure at the 100 fathom depth of B. 471 Btu/lb.
water in kPa. C. 481 Btu/lb.
D. 491 Btu/lb.
A. 1,793.96 kPa
B. 1,893.96 kPa 21. An air compressor consumed 1200 kW-hr per
C. 1,993.96 kPa day of energy. The electric motor driving the
D. 1,693.96 kPa compressor has an efficiency of 80%. If indicated
