A. 0.5
B. 3.5
C. 4.5
D. 8.5
Related Mcqs:
- One ton of refrigeration is defined as the heat rate corresponding to melting of one ton of ice in one ________________?
A. Hour
B. Day
C. Minute
D. Second - 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 - 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 - 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 - The Carnot co-efficient of performance (COP) of a domestic air conditioner compared to a household refrigerator is__________________?
A. Less
B. More
C. Same
D. Dependent on climatic conditions - In a working refrigerator, the value of COP is always__________________?
A. 0
B. < 0
C. < 1
D. > 1 - Co-efficient of Performance (COP) of a refrigerator is the ratio of the ______________________?
A. Work required to refrigeration obtained
B. Refrigeration obtained to the work required
C. Lower to higher temperature
D. Higher to lower temperature - About _________________ ton of coke is required in a cupola to produce one ton of casting ?
A. 0.03
B. 0.3
C. 0.8
D. 1.5 - Refrigeration capacity of a household refrigerator may be round about _____________ tons?
A. 0.15
B. 1.5
C. 4.5
D. 6.5 - Domestic refrigerator usually works on the _____________ refrigeration cycle?
A. Carnot
B. Air
C. Absorption
D. vapour-ejection
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