A. 1.25
B. 0.8
C. 0.5
D. 0.25
E. none of the above
Related Mcqs:
- 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 - The value of COP in vapour compression cycle is usually__________________?
A. always less than unity
B. always more than unity
C. equal to unity
D. any one of the above
E. none of the above - The vapor compression refrigerator employs the following cycle_________________?
A. Rankine
B. Carnot
C. Reversed Rankine
D. Brayton
E. Reversed Carnot - 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 - Under-cooling in a refrigeration cycle_________________?
A. increases COP
B. decreases COF
C. COP remains unaltered
D. other factors decide COP
E. unperdictable - 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 - The COP of a domestic refrigerator___________________?
A. is less than 1
B. is more than 1
C. is equal to 1
D. depends upon the make
E. depends upon the weather conditions - 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 - For obtaining high COP, the pressure range of compressor should be_______________?
A. high
B. low
C. optimum
D. any value
E. there is no such criterion - 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
