The process, generally used in winter air-conditioning to warm and humidity the air, is called

Refrigeration and Air Conditioning
The process, generally used in winter air-conditioning to warm and humidity the air, is called

Dehumidification

Cooling and dehumidification

Heating and humidification

Humidification

Dehumidification

Cooling and dehumidification

Heating and humidification

Humidification

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Refrigeration and Air Conditioning
Refrigeration in aeroplanes usually employs the following refrigerant

CO2

Air

Freon-11

Freon-22

CO2

Air

Freon-11

Freon-22

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Refrigeration and Air Conditioning
The human body feels comfortable when the heat stored in the body is

None of these

Zero

Negative

Positive

None of these

Zero

Negative

Positive

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Refrigeration and Air Conditioning
Nusselt number (NN) is given by

NN = μ cp/k

NN = hl/k

NN = ρ V l /μ

NN = V²/t.cp

NN = μ cp/k

NN = hl/k

NN = ρ V l /μ

NN = V²/t.cp

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Refrigeration and Air Conditioning
Which of the following refrigerants has lowest freezing point?

CO2

Freon-22

NH3

Freon-12

CO2

Freon-22

NH3

Freon-12

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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 The process, generally used in winter air-conditioning to warm and humidity the air, is called

Refrigeration and Air Conditioning Refrigeration in aeroplanes usually employs the following refrigerant

Refrigeration and Air Conditioning The human body feels comfortable when the heat stored in the body is

Refrigeration and Air Conditioning Nusselt number (NN) is given by

Refrigeration and Air Conditioning Which of the following refrigerants has lowest freezing point?

Refrigeration and Air Conditioning Degree of saturation or percentage humidity is

Refrigeration and Air Conditioning
The process, generally used in winter air-conditioning to warm and humidity the air, is called

Refrigeration and Air Conditioning
Refrigeration in aeroplanes usually employs the following refrigerant

Refrigeration and Air Conditioning
The human body feels comfortable when the heat stored in the body is

Refrigeration and Air Conditioning
Nusselt number (NN) is given by

Refrigeration and Air Conditioning
Which of the following refrigerants has lowest freezing point?

Refrigeration and Air Conditioning
Degree of saturation or percentage humidity is