In refrigerator, liquid receiver is required between condenser and flow controlling device, if quantity of refrigerant for system is_____________________?

Related Mcqs:

1. 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

2. For better COP of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be____________________?

   A. small
   B. high
   C. euqal
   D. anything
   E. under some conditions small and under some conditions high

3. 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

4. One of the purposes of sub-cooling the liquid refrigerant is to________________?

   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

5. If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the h.p. of compressor required will be________________?

   A. same
   B. more
   C. less
   D. more/less depending on rating
   E. unpredictable

6. 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

7. 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

8. 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

9. If a heat pump cycle operates between the condenser temperature of +27°C and evaporator temperature of – 23°C, then the Carnot COP will be_________________?

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

10. 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