August 2022

Question: Domestic refrigerator usually works on the __________ refrigeration cycle.
[A].

Carnot

[B].

air

[C].

absorption

[D].

vapour-ejection

Answer: Option C

Explanation:

No answer description available for this question.

Question: Heat pump
[A].

accomplishes only space heating in winter.

[B].

accomplishes only space cooling in summer.

[C].

accomplishes both (a) and (b).

[D].

works on Carnot cycle.

Answer: Option C

Explanation:

No answer description available for this question.

Question: An ideal liquid refrigerant should
[A].

not have a subatmospheric vapour pressure at the temperature in the refrigerator coils.

[B].

not have unduly high vapour pressure at the condenser temperature.

[C].

both (a) and (b).

[D].

have low specific heat.

Answer: Option C

Explanation:

No answer description available for this question.

Question: One ton of refrigeration capacity is equivalent to the heat removal rate of
[A].

50 k cal/hr

[B].

200 BTU/hr

[C].

200 BTU/minute

[D].

200 BTU/day

Answer: Option C

Explanation:

No answer description available for this question.

Question: In a working refrigerator, the value of COP is always
[A].

0

[B].

< 0

[C].

< 1

[D].

> 1

Answer: Option D

Explanation:

No answer description available for this question.

Question: Co-efficient of Performance (COP) of a refrigerator is the ratio of the
[A].

work required to refrigeration obtained.

[B].

refrigeration obtained to the work required.

[C].

lower to higher temperature.

[D].

higher to lower temperature.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Fundamental principle of refrigeration is based on the __________ law of thermodynamics.
[A].

zeroth

[B].

first

[C].

second

[D].

third

Answer: Option C

Explanation:

No answer description available for this question.

Question: Ideal refrigeration cycle is
[A].

same as Carnot cycle.

[B].

same as reverse Carnot cycle.

[C].

dependent on the refrigerant’s properties.

[D].

the least efficient of all refrigeration processes.

Answer: Option B

Explanation:

No answer description available for this question.

Question: As the entropy of the universe is increasing, day by day, the work producing capacity of a heat engine is
[A].

not changed

[B].

decreasing

[C].

increasing

[D].

data sufficient, can’t be predicted

Answer: Option B

Explanation:

No answer description available for this question.

Question: Equilibrium constant decreases as the temperature
[A].

increases, for an exothermic reaction.

[B].

decreases, for an exothermic reaction.

[C].

increases, for an endothermic reaction.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.