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)

50 kJ/kg

125 kJ/kg

25 kJ/kg

100 kJ/kg

50 kJ/kg

125 kJ/kg

25 kJ/kg

100 kJ/kg

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Refrigeration and Air Conditioning
In a pressure enthalpy chart, the space to the left of the saturated liquid line represents

Sub-cooled liquid region

Superheated vapour region

None of the listed here

Wet vapour region

Sub-cooled liquid region

Superheated vapour region

None of the listed here

Wet vapour region

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Refrigeration and Air Conditioning
The bypass factor for a cooling coil

Increases with increase in velocity of air passing through it

Remains unchanged with increase in velocity of air passing through it

Decreases with increase in velocity of air passing through it

May increase or decrease with increase in velocity of air passing through it depending upon the condition of air entering

Increases with increase in velocity of air passing through it

Remains unchanged with increase in velocity of air passing through it

Decreases with increase in velocity of air passing through it

May increase or decrease with increase in velocity of air passing through it depending upon the condition of air entering

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Refrigeration and Air Conditioning
A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature of -23°C. The Carnot coefficient of performance of cycle will be

0.2

5

1.2

6

0.2

5

1.2

6

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Refrigeration and Air Conditioning
The leakage in a refrigeration system using ammonia is detected by

Sulphur sticks

All of these

Soap and water

Halide torch

Sulphur sticks

All of these

Soap and water

Halide torch

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Refrigeration and Air Conditioning
Bell Coleman cycle is a

Reversed Rankine cycle

Reversed Carnot cycle

Reversed Joule cycle

Reversed Otto cycle

Reversed Rankine cycle

Reversed Carnot cycle

Reversed Joule cycle

Reversed Otto cycle

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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning In a pressure enthalpy chart, the space to the left of the saturated liquid line represents

Refrigeration and Air Conditioning The bypass factor for a cooling coil

Refrigeration and Air Conditioning A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature of -23°C. The Carnot coefficient of performance of cycle will be

Refrigeration and Air Conditioning The leakage in a refrigeration system using ammonia is detected by

Refrigeration and Air Conditioning Bell Coleman cycle is a

Refrigeration and Air Conditioning
In a pressure enthalpy chart, the space to the left of the saturated liquid line represents

Refrigeration and Air Conditioning
The bypass factor for a cooling coil

Refrigeration and Air Conditioning
A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature of -23°C. The Carnot coefficient of performance of cycle will be

Refrigeration and Air Conditioning
The leakage in a refrigeration system using ammonia is detected by

Refrigeration and Air Conditioning
Bell Coleman cycle is a