Refrigeration and Air Conditioning

For obtaining high COP, the pressure range of compressor should be_______________?

Byadmin January 25, 2019August 16, 2021

For obtaining high COP, the pressure range of compressor should be_______________?

A. high
B. low
C. optimum
D. any value
E. there is no such criterion

Refrigeration and Air Conditioning

The general rule for rating refrigeration systems (excepting for C02 system) is to approximate following h.p. per ton of refrigeration__________________?

The general rule for rating refrigeration systems (excepting for C02 system) is to approximate following h.p. per ton of refrigeration__________________?

A. 0.1 to 0.5 h.p. per ton of refrigeration
B. 0.5 to 0.8 h.p. per ton of refrigeration
C. 1 to 2 h.p. per ton of refrigeration
D. 2 to 5 h.p. per ton of refrigeration
E. 5 to 10 h.p. per ton refrigeration

Read More The general rule for rating refrigeration systems (excepting for C02 system) is to approximate following h.p. per ton of refrigeration__________________?
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

Conduction is the process of heat transfer from one particle of the body to another by the actual motion of the heated particles.

Question: Conduction is the process of heat transfer from one particle of the body to another by the actual motion of the heated particles.
[A].

True
[B].
False

Answer: Option B

Explanation:

No answer description available for this question.

Read More Conduction is the process of heat transfer from one particle of the body to another by the actual motion of the heated particles.
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

A thermostatic expansion valve in a refrigeration system

Question: A thermostatic expansion valve in a refrigeration system
[A].

ensures the evaporator completely filled with refrigerant of the load
[B].
is suitable only for constant load systems
[C].
maintains different temperatures in evaporator in proportion to load
[D].
none of the above

Answer: Option A

Explanation:

No answer description available for this question.

Read More A thermostatic expansion valve in a refrigeration system
Refrigeration and Air Conditioning

Allowable pressure on high-pressure side or ammonia absorption system is of the order of_________________?

Allowable pressure on high-pressure side or ammonia absorption system is of the order of_________________?

A. atmospheric pressure
B. slightly above atmospheric pressure
C. 2-4 bars
D. 5-6 bars
E. 7-10 bars

Read More Allowable pressure on high-pressure side or ammonia absorption system is of the order of_________________?
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature of 40° C and an evaporator temperature of 5° C, the heat rejection factor is about

Question: In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature of 40° C and an evaporator temperature of 5° C, the heat rejection factor is about
[A].

1
[B].
1.25
[C].
2.15
[D].
5.12

Answer: Option B

Explanation:

No answer description available for this question.

Read More In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature of 40° C and an evaporator temperature of 5° C, the heat rejection factor is about
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

For evaporators and condensers, for the given conditions, the logarithmic mean temperature difference ™ for parallel flow is __________ that for counter flow.

Question: For evaporators and condensers, for the given conditions, the logarithmic mean temperature difference ™ for parallel flow is __________ that for counter flow.
[A].

equal to
[B].
less than
[C].
greater than

Answer: Option A

Explanation:

No answer description available for this question.

Read More For evaporators and condensers, for the given conditions, the logarithmic mean temperature difference ™ for parallel flow is __________ that for counter flow.

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