A refrigerating system operating on reversed Brayton refrigeration cycle is used for maintaining 250 K. If the temperature at the end of constant pressure cooling is 300 K and rise in the temperature of air in the refrigerator is 50 K, then the net work of compression will be (assume air as working substance with Cp = 1 kJ/kg)

Refrigeration and Air Conditioning
A refrigerating system operating on reversed Brayton refrigeration cycle is used for maintaining 250 K. If the temperature at the end of constant pressure cooling is 300 K and rise in the temperature of air in the refrigerator is 50 K, then the net work of compression will be (assume air as working substance with Cp = 1 kJ/kg)

100 kJ/kg

125 kJ/kg

50 kJ/kg

25 kJ/kg

100 kJ/kg

125 kJ/kg

50 kJ/kg

25 kJ/kg

ANSWER DOWNLOAD EXAMIANS APP

Refrigeration and Air Conditioning
A valve which maintains a constant degree of superheat at the end of the evaporator coil, is called

Automatic expansion valve

High side float valve

Thermostatic expansion valve

Low side float valve

Automatic expansion valve

High side float valve

Thermostatic expansion valve

Low side float valve

ANSWER DOWNLOAD EXAMIANS APP

Refrigeration and Air Conditioning
The wet bulb temperature during sensible heating of air

Remains constant

None of these

Increases

Decreases

Remains constant

None of these

Increases

Decreases

ANSWER DOWNLOAD EXAMIANS APP

Refrigeration and Air Conditioning
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, is called

Humidity ratio

Relative humidity

Absolute humidity

Degree of saturation

Humidity ratio

Relative humidity

Absolute humidity

Degree of saturation

ANSWER DOWNLOAD EXAMIANS APP

Refrigeration and Air Conditioning
In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature of 40° C and an evaporator temperature of 5° C, the heat rejection factor is about

2.15

1.25

5.12

1

2.15

1.25

5.12

1

ANSWER DOWNLOAD EXAMIANS APP

Refrigeration and Air Conditioning
Highest pressure encountered in a refrigeration system should be

Much below critical pressure

Much above critical pressure

Near critical pressure

Critical pressure of refrigerant

Much below critical pressure

Much above critical pressure

Near critical pressure

Critical pressure of refrigerant

ANSWER DOWNLOAD EXAMIANS APP

Refrigeration and Air Conditioning

Refrigeration and Air Conditioning A valve which maintains a constant degree of superheat at the end of the evaporator coil, is called

Refrigeration and Air Conditioning The wet bulb temperature during sensible heating of air

Refrigeration and Air Conditioning 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, is called

Refrigeration and Air Conditioning In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature of 40° C and an evaporator temperature of 5° C, the heat rejection factor is about

Refrigeration and Air Conditioning Highest pressure encountered in a refrigeration system should be

Refrigeration and Air Conditioning
A valve which maintains a constant degree of superheat at the end of the evaporator coil, is called

Refrigeration and Air Conditioning
The wet bulb temperature during sensible heating of air

Refrigeration and Air Conditioning
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, is called

Refrigeration and Air Conditioning
In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature of 40° C and an evaporator temperature of 5° C, the heat rejection factor is about

Refrigeration and Air Conditioning
Highest pressure encountered in a refrigeration system should be