The optimum effective temperature for human comfort is

Refrigeration and Air Conditioning
The optimum effective temperature for human comfort is

Lower in winter than in summer

Not dependent on season

Same in winter and summer

Higher in winter than in summer

Lower in winter than in summer

Not dependent on season

Same in winter and summer

Higher in winter than in summer

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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 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 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 kg of dry air

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 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

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Refrigeration and Air Conditioning
During sensible cooling,

Partial pressure of vapour remains constant

Relative humidity remains constant

Wet bulb temperature increases

Specific humidity increases

Partial pressure of vapour remains constant

Relative humidity remains constant

Wet bulb temperature increases

Specific humidity increases

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Refrigeration and Air Conditioning
In a refrigeration cycle, the flow of refrigerant is controlled by

Compressor

Evaporator

Condenser

Expansion valve

Compressor

Evaporator

Condenser

Expansion valve

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Refrigeration and Air Conditioning
In vapour compression cycle using NH₃ as refrigerant, initial charge is filled at

High pressure side close to receiver

Low pressure side near receiver

Suction of compressor

Delivery of compressor

High pressure side close to receiver

Low pressure side near receiver

Suction of compressor

Delivery of compressor

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Refrigeration and Air Conditioning
In mechanical refrigeration system, the refrigerant has the maximum temperature

In evaporator

Between compressor and condenser

Before expansion valve

Between condenser and evaporator

In evaporator

Between compressor and condenser

Before expansion valve

Between condenser and evaporator

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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning The optimum effective temperature for human comfort is

Refrigeration and Air Conditioning The relative humidity is defined as

Refrigeration and Air Conditioning During sensible cooling,

Refrigeration and Air Conditioning In a refrigeration cycle, the flow of refrigerant is controlled by

Refrigeration and Air Conditioning In vapour compression cycle using NH₃ as refrigerant, initial charge is filled at

Refrigeration and Air Conditioning In mechanical refrigeration system, the refrigerant has the maximum temperature

Refrigeration and Air Conditioning
The optimum effective temperature for human comfort is

Refrigeration and Air Conditioning
The relative humidity is defined as

Refrigeration and Air Conditioning
During sensible cooling,

Refrigeration and Air Conditioning
In a refrigeration cycle, the flow of refrigerant is controlled by

Refrigeration and Air Conditioning
In vapour compression cycle using NH₃ as refrigerant, initial charge is filled at

Refrigeration and Air Conditioning
In mechanical refrigeration system, the refrigerant has the maximum temperature