Explore topic-wise MCQs in Refrigeration.

This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Refrigeration knowledge and support exam preparation. Choose a topic below to get started.

1.

Mass of refrigerant required in the heat exchanger is exactly equal to the mass of flash that would form in a simple saturation cycle.

A. True
B. False
Answer» B. False
Discussion
2.

What is effect of using flash chamber in the following VCR system arrangement?

A. C.O.P. remains the same
B. C.O.P. decreases
C. C.O.P. increases
D. Subcooling affects significantly on C.O.P.
Answer» B. C.O.P. decreases
Discussion
3.

What is the value of C.O.P. in the VCR with a heat exchanger in the following diagram?

A. h1 – h2 / h1 – h4
B. h1 – hf3 / h2 – h1
C. h2 – h1 / h4 – h1
D. h1 – hf4’ / h1 – h4
Answer» C. h2 – h1 / h4 – h1
Discussion
4.

What is the value of excess power required in this arrangement of VCR if P1 is the power required without heat exchanger and P2 is the power required with heat exchanger?

A. Pexcess = P1 / P2
B. Pexcess = P1 x P2
C. Pexcess = P1 + P2
D. Pexcess = P1 – P2
Answer» E.
Discussion
5.

What is the ratio of the mass of the vapor refrigerant and mass of the liquid refrigerant i.e., m1 / m2?

A. 1
B. h1 – h4 / h1’ – hf4’
C. 0
D. h1’ – hf4’ / h1 – h4
Answer» B. h1 – h4 / h1’ – hf4’
Discussion
6.

What is the effect of using the following arrangement of VCR?

A. C.O.P. increases
B. C.O.P. decreases
C. Total dry compression of refrigerant occurs
D. Sub-cooling does not occur
Answer» C. Total dry compression of refrigerant occurs
Discussion
7.

From the following line diagram and p-h chart, what is the power required in terms of the mass of refrigerant flowing in the condenser i.e., m2?

A. m2 (h1 – h2) / 60
B. m2 (h1 – h4) / 60
C. m2 (h2 – h1) / 60
D. m2 (h1’ – hf4’) / 60
Answer» D. m2 (h1’ – hf4’) / 60
Discussion
8.

What is the value of C.O.P. in the VCR with a flash chamber?

A. h1 – h2 / h1 – h4
B. h1 – hf3 / h2 – h1
C. h2 – h1 / h4 – h1
D. h1 – hf4’ / h1 – h4
Answer» C. h2 – h1 / h4 – h1
Discussion
9.

What is the effect of using accumulator in the VCR system?

A. C.O.P. increases
B. C.O.P. decreases
C. Total dry compression of refrigerant occurs
D. Sub-cooling happens
Answer» D. Sub-cooling happens
Discussion
10.

What is the value of C.O.P. in the VCR with flash chamber?

A. h1 – h2 / h1 – h4
B. h1 – hf3 / h2 – h1
C. h2 – h1 / h4 – h1
D. h1 – hf4’ / h1 – h4
Answer» C. h2 – h1 / h4 – h1
Discussion
11.

From the following line diagram and p-h chart, what is the refrigeration effect in terms of the mass of mixture i.e., m2?

A. m2 (h1 − hf3)
B. m2 (h2 − h1)
C. m2 (h1 − h2)
D. m2 (h4 − h1)
Answer» B. m2 (h2 − h1)
Discussion
12.

What is the effect of using a flash chamber in VCR system?

A. C.O.P. increases
B. C.O.P. decreases
C. C.O.P. remains the same
D. Mass of refrigerant flowing through evaporator increases
Answer» D. Mass of refrigerant flowing through evaporator increases
Discussion