A refrigeration cycle is the same as a _____________ cycle?

Related Mcqs:

1. 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

2. 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

3. What is the value of maximum COP in case of absorption refrigeration, if refrigeration provided is at temperature, TR (where, T1 and T2 are source & surrounding temperatures respectively.) ?

   A. TR/(T2 – TR) × (T1 – T2)/T1
   B. TR/(T2 – TR) × T1/(T1 – T2)
   C. TR/(T1 – TR) × (T1 – T2)/T1
   D. None of these

4. Which of the following units is not present in both the vapor compression refrigeration system and absorption refrigeration system ?

   A. Expansion valve
   B. Condenser
   C. Refrigerator
   D. Compressor

5. Domestic refrigerator usually works on the _____________ refrigeration cycle?

   A. Carnot
   B. Air
   C. Absorption
   D. vapour-ejection

6. In an ideal refrigeration cycle, the change in internal energy of the fluid is_____________?

   A. +ve
   B. -ve
   C. 0
   D. Either of the above three; depends on the nature of refrigerant

7. Ideal refrigeration cycle is____________________?

   A. Same as Carnot cycle
   B. Same as reverse Carnot cycle
   C. Dependent on the refrigerant’s properties
   D. The least efficient of all refrigeration processes

8. The main feature of Carnot refrigeration cycle is that, it________________________?

   A. Does not need the addition of external work for its functioning
   B. Transfers heat from high temperature to low temperature
   C. Accomplishes the reverse effect of the heat engine
   D. None of these

9. The co-efficient of performance (COP) of a refrigerating system, which is its index of performance, is defined as the ratio of useful refrigeration to the net work. The units of _____________ and COP are the same?

   A. Kinematic viscosity
   B. Work
   C. Temperature
   D. None of these

10. Refrigeration capacity of a household refrigerator may be round about _____________ tons?

    A. 0.15
    B. 1.5
    C. 4.5
    D. 6.5