If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the h.p. of compressor required will be________________?

Byadmin January 25, 2019August 16, 2021

If the evaporator temperature of a plant is lowered, keeg the condenser temperature constant, the h.p. of compressor required will be________________?

A. same
B. more
C. less
D. more/less depending on rating
E. unpredictable

Refrigeration and Air Conditioning

The lower horizontal line of the refrigeration cycle plotted on pressure-enthalpy-diagram represents_____________________?

The lower horizontal line of the refrigeration cycle plotted on pressure-enthalpy-diagram represents_____________________?

A. condensation of the refrigerant vapour
B. evaporation of the refrigerant liquid
C. compression of the refrigerant vapour
D. metering of the refrigerant liquid
E. none of the above

Read More The lower horizontal line of the refrigeration cycle plotted on pressure-enthalpy-diagram represents_____________________?
Refrigeration and Air Conditioning

In a refrigeration cycle, the flow of refrigerant is controlled by___________________?

In a refrigeration cycle, the flow of refrigerant is controlled by___________________?

A. compressor
B. condenser
C. evaporator
D. expansion valve
E. all of the above

Read More In a refrigeration cycle, the flow of refrigerant is controlled by___________________?
Refrigeration and Air Conditioning

For better COP of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be____________________?

For better COP of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be____________________?

A. small
B. high
C. euqal
D. anything
E. under some conditions small and under some conditions high

Read More For better COP of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be____________________?
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

According to Newton’s law of cooling, the heat transfer from a hot body to a cold body is

Question: According to Newton’s law of cooling, the heat transfer from a hot body to a cold body is
[A].

directly proportional to the surface area
[B].
directly proportional to the difference of temperatures between the two bodies
[C].
either (a) or (b)
[D].
both (a) and (b)

Answer: Option D

Explanation:

No answer description available for this question.

Read More According to Newton’s law of cooling, the heat transfer from a hot body to a cold body is
Refrigeration and Air Conditioning

Freon group of refrigerants are___________________?

Freon group of refrigerants are___________________?

A. inflammable
D. toxic
C. non-inflammable and toxic
D. non-toxic and inflammable
E. non-toxic and non-inflammable

Read More Freon group of refrigerants are___________________?
Refrigeration and Air Conditioning

For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then_________________?

For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then_________________?

A. bigger cabinet should be used
B. smaller cabinet should be used
C. perfectly tight vapour seal should be used
D. refrigerant with lower evaporation temperature should be used
E. refrigerant with high boiling point must be used

Read More For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then_________________?

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