In vapour compression refrigeration system, if the evaporator temperature and the condenser temperatures are -13°C and 37°C respectively, the Carnot COP will be________________?

Related Mcqs:

1. The effect of changing the evaporator temperature on COP as compared to that of changing the condenser temperature (in vapour compression refrigeration system) is__________________?

   A. Less pronounced B. More pronounced C. Equal D. Data insufficient, can’t be predicted...

2. In case of vapour compression refrigeration system, elevating the evaporator temperature (keeping the condenser temperature constant) results in_____________?

   A. Enhanced COP B. Decreased COP C. No change in the value of COP D. Increased or decreased COP; depending upon the type of refrigerant...

3. Lowering of condenser temperature (keeping the evaporator temperature constant) in case of vapour compression refrigeration system results in__________________?

   A. Increased COP B. Same COP C. Decreased COP D. Increased or decreased COP; depending upon the type of refrigerant...

4. 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...

5. The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 > T2) is given by (T1 – T2)/T1. The co-efficient of performance (C.O.P.) of a Carnot heat pump operating between T1 and T2 is given by__________________?

   A. T1/(T1-T2) B. T2/(T1-T2) C. T1/T2 D. T2/R1...

6. 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...

7. 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...

8. At 60° C, vapour pressure of methanol and water are 84.562 kPa and 19.953 kPa respectively. An aqueous solution of methanol at 60° C exerts a pressure of 39.223 kPa; the liquid phase and vapour phase mole fractions of methanol are 0.1686 and 0.5714 respectively. Activity co-efficient of methanol is__________________?

   A. 1.572 B. 1.9398 C. 3.389 D. 4.238...

9. 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...

10. Which of the following is a widely used refrigerant in vapour compression refrigeration system (using large centrifugal compressor) ?

    A. Freon B. Liquid sulphur dioxide C. Methyl chloride D. Ammonia...