Top 50+ Solved Air - Refrigeration MCQ Questions Answer
Q. The COP of Carnot Refrigerator is 3 and it produces 1 TR. The work that will be done is equal to
a. 70 kJ/min
b. 100 kJ/min
c. 200 kJ/min
d. 210 kJ/min
Q. In Bell – Colemann refrigerator for the same temperature range
a. COP of dense air system is equal to COP of open air system
b. COP of dense air system is lower than COP of open air system
c. COP of dense air system is higher than COP of open air system
d. COP of dense air system may be higher or lower than COP of open air system depending upon pressure ratio.
Q. A Bell-Colemann cycle is
a. reversed Carnot Cycle
b. reversed Joule Cycle
c. reversed Rankine cycle
d. None of the above
Q. In a refrigeration cycle the heat is rejected by refrigerant at
a. expansion valve
b. compressor
c. condenser
d. all the above
Q. The air craft system giving Lowest Dry Air Rated Turbine discharge temperature atsupersonic cruising speeds of the plane, is
a. Reduced ambient system of Refrigeration
b. Boot-strap system of Refrigeration
c. Regenerative system of Refrigeration
d. Boot strap evaporative system of Refrigeration
Q. A reversible refrigerator working between two fixed temperatures
a. has the same COP whatever the working substance
b. has its COP increased for working substance with high enthalpy of evaporation
c. has its COP increased for working substance with higher specific heats
d. none of the above