For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then

Refrigeration and Air Conditioning
For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then

Bigger cabinet should be used

Perfectly tight vapour seal should be used

Smaller cabinet should be used

Refrigerant with lower evaporation temperature should be used

Bigger cabinet should be used

Perfectly tight vapour seal should be used

Smaller cabinet should be used

Refrigerant with lower evaporation temperature should be used

ANSWER DOWNLOAD EXAMIANS APP

Refrigeration and Air Conditioning
The C.O.P. of a refrigerator working on a reversed Carnot cycle is (where T₁ = Lowest absolute temperature, and T₂ = Highest absolute temperature)

T₂/ (T₂ - T₁)

(T₁ - T₂)/T₁

(T₂ - T₁)/T₁

T₁ / (T₂ - T₁)

T₂/ (T₂ - T₁)

(T₁ - T₂)/T₁

(T₂ - T₁)/T₁

T₁ / (T₂ - T₁)

ANSWER DOWNLOAD EXAMIANS APP

Refrigeration and Air Conditioning
The sub-cooling in a refrigeration cycle

Does not alter C.O.P.

Decreases C.O.P.

None of these

Increases C.O.P.

Does not alter C.O.P.

Decreases C.O.P.

None of these

Increases C.O.P.

ANSWER DOWNLOAD EXAMIANS APP

Refrigeration and Air Conditioning
In aqua ammonia and Lithium bromide water absorption refrigeration systems, the refrigerants are respectively

Water and water

Water and lithium bromide

Ammonia and water

Ammonia and lithium bromide

Water and water

Water and lithium bromide

Ammonia and water

Ammonia and lithium bromide

ANSWER DOWNLOAD EXAMIANS APP

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)

25 kJ/kg

100 kJ/kg

50 kJ/kg

125 kJ/kg

25 kJ/kg

100 kJ/kg

50 kJ/kg

125 kJ/kg

ANSWER DOWNLOAD EXAMIANS APP

Refrigeration and Air Conditioning
The human body feels comfortable when the heat stored in the body is

Negative

Zero

None of these

Positive

Negative

Zero

None of these

Positive

ANSWER DOWNLOAD EXAMIANS APP

Refrigeration and Air Conditioning

Refrigeration and Air Conditioning For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then

Refrigeration and Air Conditioning The C.O.P. of a refrigerator working on a reversed Carnot cycle is (where T₁ = Lowest absolute temperature, and T₂ = Highest absolute temperature)

Refrigeration and Air Conditioning The sub-cooling in a refrigeration cycle

Refrigeration and Air Conditioning In aqua ammonia and Lithium bromide water absorption refrigeration systems, the refrigerants are respectively

Refrigeration and Air Conditioning The human body feels comfortable when the heat stored in the body is

Refrigeration and Air Conditioning
For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then

Refrigeration and Air Conditioning
The C.O.P. of a refrigerator working on a reversed Carnot cycle is (where T₁ = Lowest absolute temperature, and T₂ = Highest absolute temperature)

Refrigeration and Air Conditioning
The sub-cooling in a refrigeration cycle

Refrigeration and Air Conditioning
In aqua ammonia and Lithium bromide water absorption refrigeration systems, the refrigerants are respectively

Refrigeration and Air Conditioning
The human body feels comfortable when the heat stored in the body is