Refrigeration and Air Conditioning

At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant_________________?

Byadmin January 25, 2019August 16, 2021

At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant_________________?

A. decreases
B. increases
C. remains same
D. depends on other factors
E. none of the above

Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

In a saturated air-water vapour mixture, the

Question: In a saturated air-water vapour mixture, the
[A].

dry bulb temperature is higher than wet bulb temperature
[B].
dew point temperature is lower than wet bulb temperature
[C].
dry bulb, wet bulb and dew point temperature are same
[D].
dry bulb temperature is higher than dew point temperature

Answer: Option C

Explanation:

No answer description available for this question.

Read More In a saturated air-water vapour mixture, the
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

The C.O.P. of a heat pump working on a reversed Carnot cycle is

Question: The C.O.P. of a heat pump working on a reversed Carnot cycle is
[A].

[B].

[C].

[D].

Answer: Option D

Explanation:

No answer description available for this question.

Read More The C.O.P. of a heat pump working on a reversed Carnot cycle is
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

A heat pump working on a reversed Carnot cycle has a C.O.P. of 5. It works as a refrigerator taking 1 kW of work input. The refrigerating effect will be

Question: A heat pump working on a reversed Carnot cycle has a C.O.P. of 5. It works as a refrigerator taking 1 kW of work input. The refrigerating effect will be
[A].

1 kW
[B].
2 kW
[C].
3 kW
[D].
4 kW

Answer: Option D

Explanation:

No answer description available for this question.

Read More A heat pump working on a reversed Carnot cycle has a C.O.P. of 5. It works as a refrigerator taking 1 kW of work input. The refrigerating effect will be
Refrigeration and Air Conditioning

The leaks in a refrigeration system using Freon are detected by____________________?

The leaks in a refrigeration system using Freon are detected by____________________?

A. halide torch which on detection produces greenish flame lighting
B. sulphur sticks which on detection gives white smoke
C. using reagents
D. smelling
E. sensing reduction in pressure

Read More The leaks in a refrigeration system using Freon are detected by____________________?
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

In a vapour compression system, the condition of refrigerant before entering the expansion or throttle valve is

Question: In a vapour compression system, the condition of refrigerant before entering the expansion or throttle valve is
[A].

high pressure saturated liquid
[B].
wet vapour
[C].
very wet vapour
[D].
dry vapour

Answer: Option A

Explanation:

No answer description available for this question.

Read More In a vapour compression system, the condition of refrigerant before entering the expansion or throttle valve is
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

In a shell and coil condenser, water flows in the shell and the refrigerant in the coil.

Question: In a shell and coil condenser, water flows in the shell and the refrigerant in the coil.
[A].

True
[B].
False

Answer: Option B

Explanation:

No answer description available for this question.

Read More In a shell and coil condenser, water flows in the shell and the refrigerant in the coil.

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