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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The domestic refrigerator uses following type of compressor

Axial
Centrifugal
Miniature sealed unit
Piston type reciprocating

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Refrigeration and Air Conditioning
The specific humidity during heating and humidification process.

None of these
Remains constant
Decreases
Increases

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Refrigeration and Air Conditioning
The operating temperature of a cold storage is -2°C. The heat leakage from the surrounding is 30 kW for the ambient temperature of 40°C. The actual C.O.P. of refrigeration plant used is one fourth that of ideal plant working between the same temperatures. The power required to drive the plant is

1.86 kW
7.44 kW
18.6 kW
3.72 kW

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Refrigeration and Air Conditioning
The alignment circle is marked on the psychrometric chart at

26°C DBT and 60% RH
20°C DBT and 60% RH
20°C DBT and 50% RH
26°C DBT and 50% RH

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Refrigeration and Air Conditioning
The reduced ambient air cooling system has

Two cooling turbines and one heat exchanger
One cooling turbine and one heat exchanger
One cooling turbine and two heat exchangers
Two cooling turbines and two heat exchangers

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Refrigeration and Air Conditioning
For obtaining high COP, the pressure range of compressor should be

Any value
Optimum
High
Low

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MORE MCQ ON Refrigeration and Air Conditioning

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