Refrigeration and Air Conditioning

The value of COP in vapour compression cycle is usually__________________?

Byadmin January 25, 2019August 16, 2021

The value of COP in vapour compression cycle is usually__________________?

A. always less than unity
B. always more than unity
C. equal to unity
D. any one of the above
E. none of the above

Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

Which of the following refrigerant is highly toxic and flammable?

Question: Which of the following refrigerant is highly toxic and flammable?
[A].

Ammonia
[B].
Carbon dioxide
[C].
Sulphur dioxide
[D].
R-12

Answer: Option A

Explanation:

No answer description available for this question.

Read More Which of the following refrigerant is highly toxic and flammable?
Refrigeration and Air Conditioning

Absorption system normally uses the following refrigerant___________________?

Absorption system normally uses the following refrigerant___________________?

A. Freon-11
B. Freon-22
C. C02
D. S02
E. ammonia

Read More Absorption system normally uses the following refrigerant___________________?
Refrigeration and Air Conditioning

The relative coefficient of performance is_____________________?

The relative coefficient of performance is_____________________?

A. actual COP/fheoretical COP
B. theoretical COP/actual COP
C. actual COP x theoretical COP
D. 1-actual COP x theoretical COP
E. 1-actual COP/fheoretical COP.

Read More The relative coefficient of performance is_____________________?
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

An electrolux refrigerator is called a __________ absorption system.

Question: An electrolux refrigerator is called a __________ absorption system.
[A].

single fluid
[B].
two fluids
[C].
three fluids

Answer: Option C

Explanation:

No answer description available for this question.

Read More An electrolux refrigerator is called a __________ absorption system.
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

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

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.

Read More 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
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

In counter-current flow heat exchanger, the logarithmic temperature difference between the fluids is __________ as compared to parallel flow heat exchanger.

Question: In counter-current flow heat exchanger, the logarithmic temperature difference between the fluids is __________ as compared to parallel flow heat exchanger.
[A].

same
[B].
less
[C].
greater

Answer: Option C

Explanation:

No answer description available for this question.

Read More In counter-current flow heat exchanger, the logarithmic temperature difference between the fluids is __________ as compared to parallel flow heat exchanger.

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