The coefficient of performance is the ratio of the refrigerant effect to the_________________?

Related Mcqs:

1. The relative coefficient of performance is_____________________?

   A. actual COP/fheoretical COP
   B. theoretical COP/actual COP
   C. actual COP x theoretical COP
   D. 1-actual COP x theoretical COP
   E. 1-actual COP/fheoretical COP.

2. A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature of- 23°C. The Cannot coefficient of performance of cycle will be_________________?

   A. 0.2
   B. 1.2
   C. 5
   D. 6
   E. 10

3. In vapor compression cycle, the condition of refrigerant is very wet 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

4. A refrigerant should have _____________________?

   Pick up the wrong statement ?
   A. Tow specific heat of liquid
   B. high boiling point
   C. high latent heat of vaporisation
   D. higher critical temperature
   E. low specific volume of vapour

5. 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

6. The vapor pressure of refrigerant should be_________________?

   A. lower than atmospheric pressure
   B. higher than atmospheric pressure
   C. equal to atmospheric pressure
   D. could be anything
   E. none of the above

7. Accumulators should have adequate volume to store refrigerant charge at least_________________?

   A. 10%
   B. 25%
   C. 50%
   D. 75%
   E. 100%

8. 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

9. In a refrigeration cycle, the flow of refrigerant is controlled by___________________?

   A. compressor
   B. condenser
   C. evaporator
   D. expansion valve
   E. all of the above

10. In a vapor compression cycle, the refrigerant immediately after expansion valve is___________________?

    A. liquid
    B. sub-cooled liquid
    C. saturated liquid
    D. wet vapour
    E. dry vapour