For obtaining high COP, the pressure range of compressor should be

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

High

Low

Optimum

Any value

High

Low

Optimum

Any value

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Refrigeration and Air Conditioning
The material of pipe lines for a system using Freon as a refrigerant should be

Copper

Brass

Steel

Aluminium

Copper

Brass

Steel

Aluminium

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Refrigeration and Air Conditioning
The capillary tube, as an expansion device, is used in

Room air conditioners

All of these

Domestic refrigerators

Water coolers

Room air conditioners

All of these

Domestic refrigerators

Water coolers

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Refrigeration and Air Conditioning
The power per tonne of refrigeration is

3.5 × C.O.P.

None of these

3.5/C.O.P.

O.P/3.5

3.5 × C.O.P.

None of these

3.5/C.O.P.

O.P/3.5

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Refrigeration and Air Conditioning
If a heat pump cycle operates between the condenser temperature of +27°C and evaporator temperature of -23°C, then the Carnot COP will be

5

0.2

1.2

6

5

0.2

1.2

6

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Refrigeration and Air Conditioning
Degree of saturation or percentage humidity is

The ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour in the same volume of saturated air at the same temperature and pressure

The ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure

The mass of water vapour present in 1 m³ of dry air

The mass of water vapour present in 1 kg of dry air

The ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour in the same volume of saturated air at the same temperature and pressure

The ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure

The mass of water vapour present in 1 m³ of dry air

The mass of water vapour present in 1 kg of dry air

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Refrigeration and Air Conditioning

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

Refrigeration and Air Conditioning The material of pipe lines for a system using Freon as a refrigerant should be

Refrigeration and Air Conditioning The capillary tube, as an expansion device, is used in

Refrigeration and Air Conditioning The power per tonne of refrigeration is

Refrigeration and Air Conditioning If a heat pump cycle operates between the condenser temperature of +27°C and evaporator temperature of -23°C, then the Carnot COP will be

Refrigeration and Air Conditioning Degree of saturation or percentage humidity is

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

Refrigeration and Air Conditioning
The material of pipe lines for a system using Freon as a refrigerant should be

Refrigeration and Air Conditioning
The capillary tube, as an expansion device, is used in

Refrigeration and Air Conditioning
The power per tonne of refrigeration is

Refrigeration and Air Conditioning
If a heat pump cycle operates between the condenser temperature of +27°C and evaporator temperature of -23°C, then the Carnot COP will be

Refrigeration and Air Conditioning
Degree of saturation or percentage humidity is