If the condenser temperature is kept constant, the coefficient of performance of a refrigeration cycle increases with the increase in evaporator temperature.

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Question: If the condenser temperature is kept constant, the coefficient of performance of a refrigeration cycle increases with the increase in evaporator temperature.
[A].

Yes

[B].

No

Answer: Option A

Explanation:

No answer description available for this question.

The C.O.P. of a refrigerator working on a reversed Carnot cycle is (where T1 = Lowest absolute temperature, and T2 = Highest absolute temperature)

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Question: The C.O.P. of a refrigerator working on a reversed Carnot cycle is (where T1 = Lowest absolute temperature, and T2 = Highest absolute temperature)
[A].

[B].

[C].

[D].

Answer: Option A

Explanation:

No answer description available for this question.

PEDAL : BICYCLE

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Question: PEDAL : BICYCLE
[A].

inch : yardstick

[B].

walk : skip

[C].

tire : automobile

[D].

buckle : belt

Answer: Option E

Explanation:

A pedal propels a bicycle; an oar propels a canoe.

In figure shown, E is a heat engine with efficiency of 0.4 and R is a refrigerator. It is given that Q2 + Q4 = 3Q1. The C.O.P. of the refrigerator is

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Question: In figure shown, E is a heat engine with efficiency of 0.4 and R is a refrigerator. It is given that Q2 + Q4 = 3Q1. The C.O.P. of the refrigerator is
[A].

2.5

[B].

3.0

[C].

4.0

[D].

5.0

Answer: Option D

Explanation:

No answer description available for this question.

A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be

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Question: A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be
[A].

1.33

[B].

2.33

[C].

3.33

[D].

4.33

Answer: Option B

Explanation:

No answer description available for this question.