MCQOPTIONS

Explore topic-wise MCQs in Refrigeration.

This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Refrigeration knowledge and support exam preparation. Choose a topic below to get started.

1.	How is the refrigerant used in the Air refrigeration cycle?
A.	In the condenser
B.	In the compressor
C.	Directly in contact
D.	Not used at all
Answer» D. Not used at all

2.	Reduction in operating pressure in the Air refrigeration cycle results in _________
A.	increase in C.O.P.
B.	decrease in C.O.P.
C.	no change in C.O.P.
D.	always decreases
Answer» B. decrease in C.O.P.

3.	What is NOT one of the advantages of using closed Air Refrigeration system?
A.	Lighter in weight
B.	Compact in construction
C.	Environmental Friendly
D.	Lower co-efficient of performance
Answer» E.

4.	In a refrigerating machine, heat rejected is ________ the heat absorbed.
A.	equal to
B.	less than
C.	in unity with
D.	greater than
Answer» E.

5.	Why is fast freezing done in various products ?
A.	To reduce the cell damage due to ice crystal growth.
B.	To reduce energy consumption of refrigerator
C.	To reduce the bacterial activity
D.	To save time
Answer» B. To reduce energy consumption of refrigerator

6.	Which properties are essential for thermoelectric refrigeration?
A.	High electrical and thermal conductivity
B.	Low electrical and thermal conductivity
C.	Low electrical conductivity and high thermal conductivity
D.	High electrical conductivity and low thermal conductivity
Answer» E.

7.	Why is a nozzle used in a steam jet refrigeration system?
A.	To convert the high pressure motive steam into high velocity steam
B.	To reduce energy consumption
C.	To improve safety aspects
D.	To improve thermal conductivity
Answer» B. To reduce energy consumption

8.	What is the common application of Air standard refrigeration system?
A.	Domestic refrigerators
B.	Aircraft air conditioning
C.	Cold storage
D.	Car air conditioning system
Answer» C. Cold storage