Question: Work done in an adiabatic process between two states depends on the
[A].

rate of heat transmission

[B].

initial state only

[C].

end states only

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: “Dry ice” is
[A].

moisture free ice

[B].

solid helium

[C].

solid carbon dioxide

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: Co-efficient of performance for a reversed Carnot cycle working between temperatures T1 and T2 (T1 > T2) is
[A].

[B].

[C].

[D].

Answer: Option A

Explanation:

No answer description available for this question.

Question: Air-refrigeration cycle
[A].

is the most efficient of all refrigeration cycles.

[B].

has very low efficiency.

[C].

requires relatively large quantities of air to achieve a significant amount of refrigeration.

[D].

both (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.

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.