Refrigeration & Air-Conditioning MCQ Question with Answer

Refrigeration & Air-Conditioning MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

Question No : 36
Vertical lines on pressure-enthalpy chart show constant

Pressure lines

Temperature lines

Total heat lines

Entropy lines

Question No : 37
During sensible cooling,

Relative humidity remains constant

Wet bulb temperature increases

Specific humidity increases

Partial pressure of vapour remains constant

Question No : 38
Formation of frost on evaporator in refrigerator

Results in loss of heat due to poor heat transfer

Increases heat transfer rate

Is immaterial

Can be avoided by proper design

Question No : 39
In a refrigeration system, the expansion device is connected between the

Compressor and condenser

Condenser and receiver

Receiver and evaporator

Evaporator and compressor

Question No : 40
One tonne of refrigeration (1TR) means that the heat removing capacity is

21 kJ/min

210 kJ/min

420 kJ/min

620 kJ/min

Question No : 41
Air refrigeration cycle is used in

Commercial refrigerators

Domestic refrigerators

Air-conditioning

Gas liquefaction

Question No : 42
While designing the refrigeration system of an aircraft, the prime consideration is that the

System has high C.O.P.

Power per TR is low

Mass of refrigerant circulated in the system is low

Mass of the refrigeration equipment is low