Explore topic-wise MCQs in Refrigeration.

This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Refrigeration knowledge and support exam preparation. Choose a topic below to get started.

1.

Heat rejected in the condenser increases by an amount equal to, when vapour in the suction vapour is superheated?

A. H2 – H2′
B. H2 + H2′
C. H2′ – H2
D. H2′ + H2
Answer» D. H2′ + H2
Discussion
2.

Effect of high side pressure or discharge pressure or condenser pressure is to reduce the COP of the cycle.

A. True
B. False
Answer» B. False
Discussion
3.

Which one of the following is not effect of change in suction pressure?

A. reduces the net refrigeration effect
B. reduces the mass flow rate of refrigerant per ton of refrigeration
C. reduces the COP
D. increases the compressor power per ton of refrigeration
Answer» C. reduces the COP
Discussion
4.

Which one of the following is not effect of liquid sub cooling?

A. increase the refrigeration effect
B. reduce the piston displacement
C. increase the COP
D. increase the compressor power per ton of refrigeration
Answer» E.
Discussion
5.

In which case will the refrigeration effect will not increase and the COP of cycle with superheated vapour in suction phase will be less than the COP of ideal cycle?

A. Superheating the vapour from state 1 to 1′
B. Superheating the vapour from state 1 to 2
C. Superheating the vapour from state 1′ to 2′
D. COP always increases when superheating vapour in suction vapour
Answer» B. Superheating the vapour from state 1 to 2
Discussion
6.

The COP of the cycle may increase or decrease or remain unchanged depending upon the range of pressure and the degree of superheating.

A. True
B. False
Answer» B. False
Discussion
7.

Which of these is not an effect of superheat in suction vapour?

A. increase in refrigeration effect
B. increase in compression work
C. decrease the capacity of compressor per ton of refrigeration
D. condenser size decreases
Answer» E.
Discussion