Refrigeration and Air Conditioning

The suction pipe diameter of refrigerating unit compressor in comparison to delivery side is_________________?

Byadmin January 25, 2019August 16, 2021

The suction pipe diameter of refrigerating unit compressor in comparison to delivery side is_________________?

A. bigger
B. smaller
C. equal
D. smaller/bigger depending on capacity
E. unpredictable

Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

Degree of saturation or percentage humidity is

Question: Degree of saturation or percentage humidity is
[A].

the mass of water vapour present in 1 m3 of dry air
[B].
the mass of water vapour present in 1 kg of dry air
[C].
the ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure.
[D].
the ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour in the same volume of saturated air at the same temperature and pressure

Answer: Option C

Explanation:

No answer description available for this question.

Read More Degree of saturation or percentage humidity is
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

Bell-Coleman cycle is a

Question: Bell-Coleman cycle is a
[A].

reversed Carnot cycle
[B].
reversed Otto cycle
[C].
reversed Joule cycle
[D].
reversed Rankine cycle

Answer: Option C

Explanation:

No answer description available for this question.

Read More Bell-Coleman cycle is a
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

In a vapour compression refrigeration system, a throttle valve is used in place of an expander because

Question: In a vapour compression refrigeration system, a throttle valve is used in place of an expander because
[A].

it considerably reduces mass of the system
[B].
it improves the C.O.P., as the condenser is small
[C].
the positive work in isentropic expansion of liquid is very small
[D].
it leads to significant cost reduction

Answer: Option C

Explanation:

No answer description available for this question.

Read More In a vapour compression refrigeration system, a throttle valve is used in place of an expander because
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

The by-pass factor, in case of sensible cooling of air, is given by (where td1 = Dry bulb temperature of air entering the cooling coil, td2 = Dry bulb temperature of air leaving the cooling coil, and td3 = Dry bulb temperature of the cooling coil)

Question: The by-pass factor, in case of sensible cooling of air, is given by (where td1 = Dry bulb temperature of air entering the cooling coil, td2 = Dry bulb temperature of air leaving the cooling coil, and td3 = Dry bulb temperature of the cooling coil)
[A].

[B].

[C].

[D].

Answer: Option B

Explanation:

No answer description available for this question.

Read More The by-pass factor, in case of sensible cooling of air, is given by (where td1 = Dry bulb temperature of air entering the cooling coil, td2 = Dry bulb temperature of air leaving the cooling coil, and td3 = Dry bulb temperature of the cooling coil)
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

In a parallel flow heat exchanger, the rate of flow of heat and the rate of decrease of temperature are maximum.

Question: In a parallel flow heat exchanger, the rate of flow of heat and the rate of decrease of temperature are maximum.
[A].

Yes
[B].
No

Answer: Option A

Explanation:

No answer description available for this question.

Read More In a parallel flow heat exchanger, the rate of flow of heat and the rate of decrease of temperature are maximum.
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.

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