# Refrigeration and Air Conditioning (2161908) MCQ

### MCQs of Air Refrigeration

MCQ No - 1

#### Air refrigeration cycle is used in

(A) commercial refrigerators
(B) domestic refrigerators
(C) air-conditioning
(D) gas liquefaction

D
MCQ No - 2

(A) Ericsson
(B) Stirling
(C) Rankine
(D) Bell-Coleman

D
MCQ No - 3

#### If ${T}_{1}$ is the lower temperature and ${T}_{2}$ is the higher temperature than the COP of the refrigeration system working on the reversed Carnot cycle is given by

(A) $\frac{{T}_{2}-{T}_{1}}{{T}_{1}}$
(B) $\frac{{T}_{2}-{T}_{1}}{{T}_{2}}$
(C) $\frac{{T}_{1}}{{T}_{2}-{T}_{1}}$
(D) $\frac{{T}_{2}}{{T}_{2}-{T}_{1}}$

C
MCQ No - 4

#### The COP of the reversed Carnot cycle may be improved by

(A) decreasing the higher temperature
(B) increasing the lower temperature
(C) Both (A) and (B)
(D) none of the above

C
MCQ No - 5

#### The COP of a Carnot refrigerator in winter will be ___________ than in summer.

(A) higher
(B) lesser
(C) same
(D) depends on the capacity of the plant

A