Related Questions

Highest temperature encountered in refrigeration cycle should be
A Near critical temperature of refrigerant
B Above critical temperature
C At critical Temperature
D Much below critical temperature
The most important consideration, while designing the refrigeration system of an aircraft is that the refrigeration system
A Is as light as possible
B Has very high C.O.P
C Employs minimum quantity of refrigerant
D Consumer minimum horse power
Pressure-enthalpy chart is useful in refrigeration. The change in internal energy of an ideal fluid used in ideal refrigeration cycle is
A Positive
B Negative
C Zero
D Infinity
One Ton of Refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of ice---
A In 1 hour
B In 24 hour
C In 10 minutes
D In 12 hour
A refrigeration cycle is a reversed heat engine. Which of the following has the maximum value of the co-efficient of performance (COP) for a given refrigeration effect?
A Vapor compression cycle using expansion valve
B Air refrigeration cycle
C Vapor compression cycle using expansion engine
D Carnot refrigeration cycle
In a vapour absorption refrigeration system, the compressor of the vapour compression system is replaced by
A Liquid pump
B Generator
C Absorber and generator
D Absorber, generator and liquid pump
Which of the following is the result of a reduction in operating pressure in the Air refrigeration cycle?
A decrease in C.O.P.
B always decreases
C increase in C.O.P.
D no change in C.O.P.
For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then
A Bigger cabinet should be used
B Smaller cabinet should be used
C Perfectly tight vapour seal should be used
D Refrigerant with lower evaporation temperature should be used
Reducing suction pressure in refrigeration cycle
A Lowers evaporation temperature
B Increases power required per ton of refrigeration
C Lowers compressor capacity because vapour is lighter
D All of the above
The lower horizontal line of the refrigeration cycle plotted on pressure-enthalpy diagram represents
A Condensation of the refrigerant vapour
B Evaporation of the refrigerant liquid
C Compression of the refrigerant vapour
D Metering of the refrigerant liquid

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