A. reduce compressor overheating
B. reduce compressor discharge temperature
C. increase cooling effect
D. ensure that only liquid and not the vapour enters the expansion (throttling) valve
E. none of the above
Related Mcqs:
- In refrigerator, liquid receiver is required between condenser and flow controlling device, if quantity of refrigerant for system is_____________________?
A. less than 2 kg
B. more than or equal to 3.65 kg
C. more than 10 kg
D. there is no such consideration
E. pone of the above - In vapor compression refrigeration system, refrigerant occurs as liquid between_________________?
A. condenser and expansion valve
B. compressor and evaporator
C. expansion valve and evaporator
D. compressor and condenser
E. none of the above - In vapor compression cycle the condition off refrigerant is dry saturated vapor________________?
A. after passing through the condenser
B. before passing through the condenser
C. after passing through the expansion or throttle valve
D. before entering the expansion valve
E. before entering the compressor - In vapour compression cycle, the conditii of refrigerant is saturated liquid________________?
A. after passing through the condenser
B. before passing through the condensei
C. after passing through the expansion throttle valve
D. before entering the expansion valve
E. before entering the compressor - In vapour compression cycle the condition of refrigerant is superheated vapour _____________________?
A. after passing through the condenser
B. before passing through the condenser
C. after passing through the expansion or throttle valve
D. before [entering the expansion valve
E. before entering the compressor - The refrigerant for a refrigerator should have ___________________?
A. high sensible heat
B. high total heat
C. high latent heat
D. low latent heat
E. low sensible heat - In refrigerators, the temperature difference between the evaporating refrigerant and the medium being cooled should be_________________?
A. high, of the order of 25°
B. as low as possible (3 to 11°C)
C. zero
D. any value
E. none of the above - Aqua ammonia is used as refrigerant in the following type of refrigeration system_________________?
A. compression
B. direct
C. indirect
D. absorption
E. none of the above - In vapour compression cycle using NH3 as refrigerant, initial charge is filled at_________________?
A. suction of compressor
B. delivery of compressor
C. high pressure side close to receiver
D. low pressure side near receiver
E. anywhere in the cycle - The coefficient of performance is the ratio of the refrigerant effect to the_________________?
A. heat of compression
B. work done by compressor
C. enthalpy increase in compressor
D. all of the above
E. none of the above
