Formation of frost on evaporator in refrigerator

Refrigeration and Air Conditioning
Formation of frost on evaporator in refrigerator

Increases heat transfer rate

Results in loss of heat due to poor heat transfer

Can be avoided by proper design

Is immaterial

Increases heat transfer rate

Results in loss of heat due to poor heat transfer

Can be avoided by proper design

Is immaterial

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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

Before entering the condenser

After leaving the compressor

After leaving the condenser

Before entering the compressor

Before entering the condenser

After leaving the compressor

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Refrigeration and Air Conditioning
In case of sensible cooling of air, the coil efficiency is given by

1 - B.P.F.

P.F. - 1

1/ B.P.F.

1 + B.P.F.

1 - B.P.F.

P.F. - 1

1/ B.P.F.

1 + B.P.F.

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Refrigeration and Air Conditioning
If a gas is to be liquefied, its temperature must be

None of these

Increased to a value above its critical temperature

Reduced to a value below its critical temperature

Equal to critical temperature

None of these

Increased to a value above its critical temperature

Reduced to a value below its critical temperature

Equal to critical temperature

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Refrigeration and Air Conditioning
The reciprocating refrigerant compressors are very suitable for

Large displacements and high condensing pressures

Small displacements and high condensing pressures

Large displacements and low condensing pressures

Small displacements and low condensing pressures

Large displacements and high condensing pressures

Small displacements and high condensing pressures

Large displacements and low condensing pressures

Small displacements and low condensing pressures

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Refrigeration and Air Conditioning
Degree of saturation or percentage humidity is

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 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 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 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 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 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 Formation of frost on evaporator in refrigerator

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

Refrigeration and Air Conditioning In case of sensible cooling of air, the coil efficiency is given by

Refrigeration and Air Conditioning If a gas is to be liquefied, its temperature must be

Refrigeration and Air Conditioning The reciprocating refrigerant compressors are very suitable for

Refrigeration and Air Conditioning Degree of saturation or percentage humidity is

Refrigeration and Air Conditioning
Formation of frost on evaporator in refrigerator

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

Refrigeration and Air Conditioning
In case of sensible cooling of air, the coil efficiency is given by

Refrigeration and Air Conditioning
If a gas is to be liquefied, its temperature must be

Refrigeration and Air Conditioning
The reciprocating refrigerant compressors are very suitable for

Refrigeration and Air Conditioning
Degree of saturation or percentage humidity is