Refrigeration And Air Conditioning - Study Mode

[#131] For better C.O.P of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be
Correct Answer

(A) Small

Explanation

Solution: For better C.O.P of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be Small

[#132] Choose the correct statement
Correct Answer

(B) If operating temperature of system is low, then refrigerant with low boiling point should be used

Explanation

Solution: If operating temperature of system is low, then refrigerant with low boiling point should be used

[#133] The C.O.P. of a heat pump working on a reversed Carnot cycle is
Correct Answer

(D) $$frac{{{{ ext{T}}_2}}}{{{{ ext{T}}_2} - {{ ext{T}}_1}}}$$

Explanation

Solution: The C.O.P. of a heat pump working on a reversed Carnot cycle is $$frac{{{{ ext{T}}_2}}}{{{{ ext{T}}_2} - {{ ext{T}}_1}}}$$

[#134] Critical pressure of a liquid is the pressure
Correct Answer

(A) Above which liquid will remain liquid

Explanation

Solution: Critical pressure is the pressure required to liquify a gas at or below its critical temperature. Critical pressure of a liquid is the pressure, above which liquid will remain liquid.

[#135] In a pressure enthalpy chart, the space to the left of the saturated liquid line represents
Correct Answer

(C) Sub-cooled liquid region

Explanation

Solution: In a pressure enthalpy chart, the space to the left of the saturated liquid line represents Sub-cooled liquid region