Refrigeration and Air Conditioning (2161908) MCQ

MCQs of Refrigerants

MCQ No - 1

Pick up the wrong statement. A refrigerant should have

(A) low specific heat of liquid
(B) high boiling point
(C) high latent heat of vaporization
(D) higher critical temperature

B
MCQ No - 2

The refrigerant for a refrigerator should have

(A) high sensible heat
(B) high total heat
(C) high latent heat
(D) low latent heat

C
MCQ No - 3

Which of the following is not a desirable property of a refrigerant?

(A) High risibility with oil
(B) Low boiling point
(C) Good electrical conductor
(D) Large latent heat

C
MCQ No - 4

Ammonia is one of the oldest refrigerants, which is still used widely, because

(A) it offers excellent performance
(B) it is a natural refrigerant
(C) it is inexpensive
(D) all of the above

D
MCQ No - 5

The boiling point of ammonia is

(A) -10.5°C
(B) -30°C
(C) -33.3°C
(D) -77.7°C

C