Refrigeration And Air Conditioning MCQ Questions & Answers | Mechanical Engineering

A. Freezing at the expansion valve

B. Restriction to refrigerant flow

C. Corrosion of steel plates

D. All of these

A. Reversed Carnot cycle

B. Bell Coleman cycle

C. Both (A) and (B)

D. None of these

A. Decrease in fin spacing and increase in number of rows

B. Increase in fin spacing and increase in number of rows

C. Increase in fin spacing and decrease in number of rows

D. Decrease in fin spacing and decrease in number of rows

A. Increases heat transfer

B. Improves C.O.P. of the system

C. Increases power consumption

D. Reduces power consumption

A. -10.5°C

B. -30°C

C. -33.3°C

D. -77.7°C

A. Ineffective refrigeration

B. High power consumption

C. Freezing automatic regulating valve

D. Corrosion of whole system

A. 25 kJ/kg

B. 50 kJ/kg

C. 100 kJ/kg

D. 125 kJ/kg

A. The mass of water vapour present in 1 m³ of dry air

B. The mass of water vapour present in 1 kg of dry air

C. The ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure

D. The ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour in the same volume of saturated air at the same temperature and pressure

A. Remains constant

B. Increases

C. Decreases

D. None of these

A. Remains constant

B. Increases

C. Decreases

D. None of these