Blue Book

Find the work possess for a helium gas at 20°C.

• 609 kJ/kg

• 168 kJ/kg

• 229 kJ/kg

• 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?

• Helium

• Ethane

• Methane

• Ethene

Find the enthalpy of Helium if its internal energy is 200 kJ/kg.

• 144 kJ/kg

• 223.42 kJ/kg

• 333.42 kJ/kg

• 168 kJ/kg

Compute the mass of a 2 m3 propane at 280 kPa and 40°C.

• 6.47 kg

• 5.1 kg

• 10.20 kg

• 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.

• 200

• 210

• 220

• 230

Compute the free aperture cross section in m3 for the ventilation of a machinery room if the mass of refrigerant is 9 kg.

• 0.314

• 0.414

• 0.514

• 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.

• 106.71 kg/hr

• 108.71 kg/hr

• 110.71 kg/hr

• 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.

• 0.286 ft

• 0.386 ft

• 0.486 ft

• 0.586 ft

A thermal power plant has the heat rate of 11,363 Btu/kW-hr. Find the thermal efficiency of the plant.

• 28%

• 30%

• 34%

• 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?

• 0.00714

• 0.00614

• 0.00234

• 0.00187