When the air is passed through an insulated chamber having sprays of water maintained at a temperature higher than the dew point temperature of entering air but lower than its dry bulb temperature, then the air is said to be

Refrigeration and Air Conditioning
When the air is passed through an insulated chamber having sprays of water maintained at a temperature higher than the dew point temperature of entering air but lower than its dry bulb temperature, then the air is said to be

Heated and humidified

Cooled and humidified

Cooled and dehumidified

Heated and dehumidified

Heated and humidified

Cooled and humidified

Cooled and dehumidified

Heated and dehumidified

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Refrigeration and Air Conditioning
The refrigerant used in small tonnage commercial machines (hermetically sealed units) is

R-12

Sulphur dioxide

Carbon dioxide

Ammonia

R-12

Sulphur dioxide

Carbon dioxide

Ammonia

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Refrigeration and Air Conditioning
Air refrigeration operates on

Brayton cycle

Reversed Carnot cycle

Carnot cycle

Rankine’s cycle

Brayton cycle

Reversed Carnot cycle

Carnot cycle

Rankine’s cycle

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Refrigeration and Air Conditioning
One ton of the refrigeration is

The standard unit used in refrigeration problems

The refrigeration effect to produce 1 ton of ice at NTP conditions

The refrigeration effect to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours

The cooling effect produced by melting 1 ton of ice

The standard unit used in refrigeration problems

The refrigeration effect to produce 1 ton of ice at NTP conditions

The refrigeration effect to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours

The cooling effect produced by melting 1 ton of ice

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Refrigeration and Air Conditioning
In refrigerators, the temperature difference between the evaporating refrigerant and the medium being cooled should be

Zero

Any value

High, of the order of 25°

As low as possible (3 to 11°C)

Zero

Any value

High, of the order of 25°

As low as possible (3 to 11°C)

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Refrigeration and Air Conditioning
The difference between dry bulb temperature and wet bulb temperature, is called

Wet bulb depression

Dew point depression

Degree of saturation

Dry bulb depression

Wet bulb depression

Dew point depression

Degree of saturation

Dry bulb depression

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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning When the air is passed through an insulated chamber having sprays of water maintained at a temperature higher than the dew point temperature of entering air but lower than its dry bulb temperature, then the air is said to be

Refrigeration and Air Conditioning The refrigerant used in small tonnage commercial machines (hermetically sealed units) is

Refrigeration and Air Conditioning Air refrigeration operates on

Refrigeration and Air Conditioning One ton of the refrigeration is

Refrigeration and Air Conditioning In refrigerators, the temperature difference between the evaporating refrigerant and the medium being cooled should be

Refrigeration and Air Conditioning The difference between dry bulb temperature and wet bulb temperature, is called

Refrigeration and Air Conditioning
When the air is passed through an insulated chamber having sprays of water maintained at a temperature higher than the dew point temperature of entering air but lower than its dry bulb temperature, then the air is said to be

Refrigeration and Air Conditioning
The refrigerant used in small tonnage commercial machines (hermetically sealed units) is

Refrigeration and Air Conditioning
Air refrigeration operates on

Refrigeration and Air Conditioning
One ton of the refrigeration is

Refrigeration and Air Conditioning
In refrigerators, the temperature difference between the evaporating refrigerant and the medium being cooled should be

Refrigeration and Air Conditioning
The difference between dry bulb temperature and wet bulb temperature, is called