BLUE BOOK

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

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

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

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

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

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 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

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 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%

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