The vapor compression refrigerator employs the following cycle_________________?

Related Mcqs:

1. The COP of a vapor compression plant in comparison to vapor absorption plant is ________________?

   A. more
   B. less
   C. same
   D. more/less depending on size of plant
   E. unpredictable

2. Domestic refrigerator working on vapour compression cycle uses the following type of expansion device____________________?

   A. electrically operated throttling valve
   B. manually operated valve
   C. thermostatic valve
   D. capillary tube
   E. expansion valve.

3. Efficiency of a Carnot engine is given as 80%. If the- cycle direction be reversed, what will be the value of COP of reversed Carnot cycle_________________?

   A. 1.25
   B. 0.8
   C. 0.5
   D. 0.25
   E. none of the above

4. 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. reduces weight displaced by piston
   E. all of the above

5. Under-cooling in a refrigeration cycle_________________?

   A. increases COP
   B. decreases COF
   C. COP remains unaltered
   D. other factors decide COP
   E. unperdictable

6. 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

7. In vapor compression cycle, the condition of refrigerant is high pressure saturated liquid________________?

   A. after passing through the condenser
   B. before passing through the condenser
   C. after passing through the expansion or thiottle valve
   D. before entering the expansion valve
   E. before entering the compressor

8. Vapor compression refrigeration is some what like ____________________?

   A. Carnot cycle
   B. Rankine cycle
   C. reversed Camot cycle
   D. reversed Rankine cycle
   E. none of the above

9. 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

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