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.

Superheating before compression increases the refrigeration effect.

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

In domestic vapor compression refrigeration, the refrigerant commonly used is?

A. Freon 12
B. CO<sub>2</sub>
C. H<sub>2</sub>O
D. Ammonia
Answer» B. CO<sub>2</sub>
Discussion
3.

What is the mass flow rate of the refrigerant when the heat required is 100 MJ/hr, enthalpy at discharge H2 is 434.5 KJ/kg and enthalpy of liquid Hf3 in KJ/kg at point 3 in p-h diagram is 271.97?

A. 10.254 kg/hr
B. 15.56 kg/hr
C. 10.254 kg/min
D. 15.56 kg/min
Answer» D. 15.56 kg/min
Discussion
4.

The COP of vapor compression when vapor is superheated after compression having refrigeration effect (Re) of 360 and work done (W) of 40 is?

A. 8
B. 6.7
C. 7.8
D. 9
Answer» E.
Discussion
5.

The net effect of superheating is to have ________ COP.

A. higher
B. lower
C. moderate
D. higher or lower depending on the refrigerant used
Answer» C. moderate
Discussion