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

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

18.6 kW

7.44 kW

1.86 kW

3.72 kW

18.6 kW

7.44 kW

1.86 kW

3.72 kW

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Refrigeration and Air Conditioning
Which of the following statement is correct?

The constant enthalpy lines are also constant wet bulb temperature lines

All of the listed here

The wet bulb temperature is a measure of enthalpy of moist air

The wet bulb and dry bulb temperature are equal at saturation condition

The constant enthalpy lines are also constant wet bulb temperature lines

All of the listed here

The wet bulb temperature is a measure of enthalpy of moist air

The wet bulb and dry bulb temperature are equal at saturation condition

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Refrigeration and Air Conditioning
The COP of a domestic refrigerator

Is less than 1

Is equal to 1

Is more than 1

Depends upon the make

Is less than 1

Is equal to 1

Is more than 1

Depends upon the make

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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

1

2.15

1.25

5.12

1

2.15

1.25

5.12

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Refrigeration and Air Conditioning
A mixture of dry air and water vapour, when the air has diffused the maximum amount of water vapour into it, is called

Moist air

Dry air

Saturated air

Specific humidity

Moist air

Dry air

Saturated air

Specific humidity

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Refrigeration and Air Conditioning
In a vapour compression system, the condition of refrigerant is dry saturated vapour

After leaving the condenser

Before entering the compressor

After leaving the compressor

Before entering the condenser

After leaving the condenser

Before entering the compressor

After leaving the compressor

Before entering the condenser

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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning Which of the following statement is correct?

Refrigeration and Air Conditioning The COP of a domestic refrigerator

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

Refrigeration and Air Conditioning A mixture of dry air and water vapour, when the air has diffused the maximum amount of water vapour into it, is called

Refrigeration and Air Conditioning In a vapour compression system, the condition of refrigerant is dry saturated vapour

Refrigeration and Air Conditioning
Which of the following statement is correct?

Refrigeration and Air Conditioning
The COP of a domestic refrigerator

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

Refrigeration and Air Conditioning
A mixture of dry air and water vapour, when the air has diffused the maximum amount of water vapour into it, is called

Refrigeration and Air Conditioning
In a vapour compression system, the condition of refrigerant is dry saturated vapour