A. Air cycle
B. Carnot cycle
C. Ordinary vapour compression cycle
D. Vapour compression with a reversible expansion engine
Related Mcqs:
- 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 - Out of the following refrigeration cycles, which one has maximum COP ?
A. Air cycle
B. Carnot cycle
C. Ordinary vapor compression cycle
D. Vapor compression with a reversible expansion engine - 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 - Which of the following has the minimum value of COP for a given refrigeration effect ?
A. Reverse Carnot cycle
B. Ordinary vapour-compression cycle
C. Vapour-compression process with a reversible expansion engine
D. Air refrigeration cycle - 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 - 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 - 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________________?
A. 5.2
B. 6.2
C. 0.168
D. Data insufficient, can’t be found out - 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 - COP of a refrigerator drawing 1 kW of power per ton of refrigeration is about____________________?
A. 0.5
B. 3.5
C. 4.5
D. 8.5
