Explore topic-wise MCQs in Refrigeration.

This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Refrigeration knowledge and support exam preparation. Choose a topic below to get started.

1.

What is the value of Refrigeration effect if m1 = 4 kg/min, and enthalpies for the point 1, 2, 4, 5, 9 are 1350, 1550, 1480, 1620, and 280 kJ/kg. If the refrigeration effect is 4280 kJ/min and work done is 15 kW, then what is the value of C.O.P.?

A. 4.85
B. 5.50
C. 4.75
D. 6.00
Answer» D. 6.00
Discussion
2.

What is the purpose of using a flash intercooler?

A. To increase pressure
B. To decrease pressure
C. To separate vapor and liquid refrigerant and de-superheat
D. To evaporate refrigerant partially
Answer» D. To evaporate refrigerant partially
Discussion
3.

What is the purpose of using liquid sub-cooler?

A. To increase the cost of the compressor
B. To reduce the volumetric efficiency
C. To re-heat superheated refrigerant
D. To increase the refrigeration effect
Answer» E.
Discussion
4.

What is the purpose of using intercooler?

A. To increase the cost of the compressor
B. To cool the superheated refrigerant
C. To re-heat superheated refrigerant
D. To reduce the volumetric efficiency
Answer» C. To re-heat superheated refrigerant
Discussion
5.

Why is multi-stage or compound VCR with water intercooler, liquid sub-cooler, and flash intercooler used?

A. To improve C.O.P.
B. To decrease refrigeration effect
C. To increase work
D. To increase leakage loss
Answer» B. To decrease refrigeration effect
Discussion