Formation of frost on evaporator in refrigerator ________________?

Byadmin January 25, 2019August 16, 2021

Formation of frost on evaporator in refrigerator ________________?

A. results in loss of heat due to poor heat transfer
B. increases heat transfer rate
C. is immaterial
D. can be avoided by proper design
E. decreases compressor power

Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

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

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.

Read More If the condenser temperature is kept constant, the coefficient of performance of a refrigeration cycle increases with the increase in evaporator temperature.
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

Oil separator in a refrigeration cycle is installed

Question: Oil separator in a refrigeration cycle is installed
[A].

before compressor
[B].
between compressor and condenser
[C].
between condenser and evaporator
[D].
between condenser and expansion valve

Answer: Option B

Explanation:

No answer description available for this question.

Read More Oil separator in a refrigeration cycle is installed
Refrigeration and Air Conditioning

A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing pressure of about 67 kg/cm. The refrigerant used is________________?

A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing pressure of about 67 kg/cm. The refrigerant used is________________?

A. Ammonia
B. Carbon dioxide
C. Freon
D. Brine
E. Hydrocarbon refrigerant

Read More A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing pressure of about 67 kg/cm. The refrigerant used is________________?
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

One tonne of refrigeration (1TR) means that the heat removing capacity is

Question: One tonne of refrigeration (1TR) means that the heat removing capacity is
[A].

21 kJ/min
[B].
210 kJ/min
[C].
420 kJ/min
[D].
620 kJ/min

Answer: Option B

Explanation:

No answer description available for this question.

Read More One tonne of refrigeration (1TR) means that the heat removing capacity is
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

A mixture of dry air and water vapour, when the air has diffused the maximum amount of water vapour into it, is called

Question: A mixture of dry air and water vapour, when the air has diffused the maximum amount of water vapour into it, is called
[A].

dry air
[B].
moist air
[C].
saturated air
[D].
specific humidity

Answer: Option C

Explanation:

No answer description available for this question.

Read More A mixture of dry air and water vapour, when the air has diffused the maximum amount of water vapour into it, is called
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

For air conditioning the operation theatre in a hospital, the percentage of outside air in the air supplied is

Question: For air conditioning the operation theatre in a hospital, the percentage of outside air in the air supplied is
[A].

zero
[B].
20
[C].
50
[D].
100

Answer: Option D

Explanation:

No answer description available for this question.

Read More For air conditioning the operation theatre in a hospital, the percentage of outside air in the air supplied is

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