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
Related Mcqs:
- 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 - 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 - 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 - A refrigeration cycle is the same as a _____________ cycle?
A. Turbine
B. Heat engine
C. Reversed heat engine
D. None of these - 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 units is not present in both the vapor compression refrigeration system and absorption refrigeration system ?
A. Expansion valve
B. Condenser
C. Refrigerator
D. Compressor - An ideal gas is taken around the cycle ABCA as shown in P-V diagram below: The work done by the gas during the cycle is equal to_________________?
A. 12 P1V1
B. 6 P1 V1
C. 3 P1V1
D. P1 V1 - 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 - Domestic refrigerator usually works on the _____________ refrigeration cycle?
A. Carnot
B. Air
C. Absorption
D. vapour-ejection - Specific volume of an ideal gas is____________________?
A. Equal to its density
B. The reciprocal of its density
C. Proportional to pressure
D. None of these
