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Bluebook > BLUEBOOK 1-100 > Flashcards

BLUEBOOK 1-100 Flashcards

1
Q
  1. Find the work possess for a helium gas at 20°C.
    A. 609 kJ/kg
    B. 168 kJ/kg
    C. 229 kJ/kg
    D. 339 kJ/kg
A

A. 609 kJ/kg

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2
Q
  1. Two kilogram of gas is confined in a 1 m3 tank at 200 kPa and 88°C. What type of gas is in the tank?
    A. Helium B. Ethane C. Methane D. Ethene
A

B. Ethane

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3
Q
  1. Find the enthalpy of Helium if its internal energy is 200 kJ/kg.
    A. 144 kJ/kg
    B. 223.42 kJ/kg
    C. 333.42 kJ/kg
    D. 168 kJ/kg
A

C. 333.42 kJ/kg

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4
Q
  1. Compute the mass of a 2 m3 propane at 280 kPa and 40°C.
    A. 6.47 kg
    B. 5.1 kg
    C. 10.20 kg
    D. 9.47 kg
A

D. 9.47 kg

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5
Q
  1. Compute the air flow in ft3/min of mechanical ventilation required to exhaust an accumulation of refrigerant due to leaks of the system capable of revolving air from the machinery for a mass of 4 lbs refrigerant.
    A. 200
    B. 210
    C. 220
    D. 230
A

A. 200

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6
Q
  1. Compute the free aperture cross section in m3 for the ventilation of a machinery room if the mass of refrigerant is 9 kg.
    A. 0.314
    B. 0.414
    C. 0.514
    D. 0.614
A

B. 0.414

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7
Q
  1. A 29.53” x 39.37” pressure vessel contains ammonia with f = 0.041. Compute the minimum required discharge capacity of the relief device in kg/hr.
    A. 106.71 kg/hr
    B. 108.71 kg/hr
    C. 110.71 kg/hr
    D. 112.71 kg/hr
A

C. 110.71 kg/hr

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8
Q
  1. Compute the maximum length of the discharge pipe installed on an outlet of a pressure-relief device in feet for internal pipe diameter of 0.5 inch and rated discharge capacity is 8 lb/min of air. The rated pressure of relief valve is 10 psig.
    A. 0.286 ft
    B. 0.386 ft
    C. 0.486 ft
    D. 0.586 ft
A

A. 0.286 ft

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9
Q
  1. A thermal power plant has the heat rate of 11,363 Btu/kW-hr. Find the thermal efficiency of the plant.
    A. 28%
    B. 30%
    C. 34%
    D. 40%
A

B. 30%

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10
Q
  1. What is the hydraulic gradient of a 1 mile, 17 inches inside diameter pipe when 3300 gal/min of water flow with f = 0.03?
    A. 0.00714
    B. 0.00614
    C. 0.00234
    D. 0.00187
A

A. 0.00714

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11
Q
  1. Find the loss of head in the pipe entrance if speed of flow is 10 m/s.
    A. 5.10 m
    B. 10.2 m
    C. 17.4 m
    D. 2.55 m
A

D. 2.55 m

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12
Q
  1. Wet material, containing 220% moisture (dry basis), is to be dried at a rate of 1.5 kg/s in a continuous dryer to give a product containing 10% (dry basis). Find the moisture removed in kg/hr.
A

A. 3543.75 kg/hr
B. 3513.75 kg/hr
C. 3563.75 kg/hr
D. 3593.75 kg/hr

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13
Q
  1. Copra enters a dryer containing 70% moisture and leaves 7% moisture. Find the moisture removed on each pound of solid in the final product.
    A. 6.258 lbs
    B. 1.258 lbs
    C. 4.258 lbs
    D. 2.258 lbs
A

D. 2.258 lbs

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14
Q
  1. A 1 m x 1.5 m cylindrical tank is full of oil with SG = 0.92. Find the force acting at the bottom of the tank in dynes.
    A. 106.33 x 103 dynes
    B. 106.33 x 104 dynes
    C. 106.33 x 105 dynes
    D. 106.33 x 106 dynes
A

D. 106.33 x 106 dynes

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15
Q
  1. Find the pressure at the 100 fathom depth of water in kPa.
    A. 1,793.96 kPa
    B. 1,893.96 kPa
    C. 1,993.96 kPa
    D. 1,693.96 kPa
A

A. 1,793.96 kPa

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16
Q
  1. Find the depth in furlong of the ocean (SG = 1.03) if the pressure at the sea bed is 2,032.56 kPa.
    A. 1
    B. 2
    C. 3
    D. 4
17
Q
  1. Find the mass of 10 quartz of water.
    A. 10.46 kg
    B. 9.46 kg
    C. 11.46 kg
    D. 8.46 kg
A

B. 9.46 kg

18
Q
  1. Find the mass of carbon dioxide having a pressure of 20 psia at 200°F with 10 ft3 volume.
    A. 1.04 lbs
    B. 1.14 lbs
    C. 1.24 lbs
    D. 1.34 lbs
A

C. 1.24 lbs

19
Q
  1. Find the heat needed to raise the temperature of water from 30°C to 100°C with 60% quality. Consider an atmospheric pressure of 101.325 kPa. Use the approximate enthalpy formula of liquid.
    A. 293.09 kJ/kg
    B. 1,772.90 kJ/kg
    C. 1,547.90 kJ/kg
    D. 1,647.29 kJ/kg
A

D. 1,647.29 kJ/kg

20
Q
  1. Find the enthalpy of water at 212°F and 14.7 psi if the dryness factor is 30%. Use the approximate enthalpy formula of liquid.
    A. 461 Btu/lb
    B. 471 Btu/lb
    C. 481 Btu/lb
    D. 491 Btu/lb
A

B. 471 Btu/lb

21
Q
  1. An air compressor consumed 1200 kW-hr per day of energy. The electric motor driving the compressor has an efficiency of 80%. If indicated power of compressor is 34 kW, find the mechanical efficiency of the compressor.

A. 117.65%
B. 75%
C. 85%
D. 90%

22
Q
  1. A refrigeration system consumed 28,800 kW-hr per month of energy. There is 20% of energy lost due to the cooling system of the compressor and the motor efficiency is 90%. If the COP of the system is 6, find the mechanical efficiency of the compressor.
    A. 43.15 TR
    B. 46.15 TR
    C. 49.15 TR
    D. 41.15 TR
A

C. 49.15 TR

23
Q
  1. A 23 ton refrigeration system has a heat rejected of 100 kW. Find the energy efficiency ratio of the system.

A. 13.42
B. 14.42
C. 15.42
D. 16.42

24
Q
  1. A 200 mm x 250 mm, 8-cylinder, 4-stroke diesel engine has a brake power of 150 kW. The mechanical efficiency is 80%. If two of the cylinders were accidentally cut off, what will be the new friction power?
    A. 31.50 kW
    B. 33.50 kW
    C. 35.50 kW
    D. 37.50 kW
A

D. 37.50 kW

25
Q
  1. If the energy efficiency ratio of the refrigeration system is 12.6, what is the COP of the system?
    A. 3.69
    B. 4.23
    C. 5.92
    D. 6.83
26
Q
  1. An air compressor has a power of 40 kW at 4% clearance. If the clearance will increase to 7%, what is the new power?
    A. 70 kW
    B. 40 kW
    C. 53 kW
    D. 60 kW
27
Q
  1. What is the approximate value of temperature of water having enthalpy of 208 Btu/lb?
    A. 138.67°C
    B. 115.55°C
    C. 258.67°C
    D. 68.67°C
A

B. 115.55°C

28
Q
  1. Convert 750°R to K.
    A. 390.33 K
    B. 395.33 K
    C. 410.33 K
    D. 416.33 K
A

D. 416.33 K

29
Q
  1. An Otto cycle has a compression ratio of 8. Find the pressure during compression.
    A. 18.38
    B. 16.38
    C. 14.38
    D. 12.28
30
Q
  1. A diesel cycle has a cut off ratio of 2.5 and expansion ratio of 4. Find the clearance of the cycle.
    cycle.
    A. 9.11%
    B. 5.55%
    C. 11.11%
    D. 15.15%

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