Efficiency of a Carnot engine is given as 80%. If the cycle direction be reversed, what will be the value of C.O.P. of reversed Carnot Cycle?

Refrigeration and Air Conditioning
Efficiency of a Carnot engine is given as 80%. If the cycle direction be reversed, what will be the value of C.O.P. of reversed Carnot Cycle?

0.8

0.25

0.5

1.25

0.8

0.25

0.5

1.25

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Refrigeration and Air Conditioning
Most thermostatic expansion valves are set for a superheat of

10°C

5°C

15°C

20°C

10°C

5°C

15°C

20°C

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Refrigeration and Air Conditioning
Wet bulb temperature is the temperature of air recorded by a thermometer, when

None of these

It is not affected by the moisture present in the air

Its bulb is surrounded by a wet cloth exposed to the air

The moisture present in it begins to condense

None of these

It is not affected by the moisture present in the air

Its bulb is surrounded by a wet cloth exposed to the air

The moisture present in it begins to condense

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Refrigeration and Air Conditioning
The relative humidity is defined as

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 mass of water vapour present in 1 m3 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 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 mass of water vapour present in 1 m3 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

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Refrigeration and Air Conditioning
The temperature of air recorded by a thermometer, when its bulb is surrounded by a wet cloth exposed to the air, is called

Dry bulb temperature

Wet bulb temperature

None of these

Dew point temperature

Dry bulb temperature

Wet bulb temperature

None of these

Dew point temperature

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Refrigeration and Air Conditioning
Reducing suction pressure in refrigeration cycle

Lowers compressor capacity because vapour is lighter

Lowers evaporation temperature

All of these

Increases power required per ton of refrigeration

Lowers compressor capacity because vapour is lighter

Lowers evaporation temperature

All of these

Increases power required per ton of refrigeration

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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning Efficiency of a Carnot engine is given as 80%. If the cycle direction be reversed, what will be the value of C.O.P. of reversed Carnot Cycle?

Refrigeration and Air Conditioning Most thermostatic expansion valves are set for a superheat of

Refrigeration and Air Conditioning Wet bulb temperature is the temperature of air recorded by a thermometer, when

Refrigeration and Air Conditioning The relative humidity is defined as

Refrigeration and Air Conditioning The temperature of air recorded by a thermometer, when its bulb is surrounded by a wet cloth exposed to the air, is called

Refrigeration and Air Conditioning Reducing suction pressure in refrigeration cycle

Refrigeration and Air Conditioning
Efficiency of a Carnot engine is given as 80%. If the cycle direction be reversed, what will be the value of C.O.P. of reversed Carnot Cycle?

Refrigeration and Air Conditioning
Most thermostatic expansion valves are set for a superheat of

Refrigeration and Air Conditioning
Wet bulb temperature is the temperature of air recorded by a thermometer, when

Refrigeration and Air Conditioning
The relative humidity is defined as

Refrigeration and Air Conditioning
The temperature of air recorded by a thermometer, when its bulb is surrounded by a wet cloth exposed to the air, is called

Refrigeration and Air Conditioning
Reducing suction pressure in refrigeration cycle