Refrigeration & Air Conditioning Mcqs

Q.  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


ANSWER: See Answer
 
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MCQs:  The evolution of heat of solution takes place in ammonia absorption plant when _____________________?
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MCQs:  The C.O.P. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will__________________?
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MCQs:  Cooling water is required for following equipment in ammonia absorption plant__________________?
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MCQs:  The general rule for rating refrigeration systems (excepting for C02 system) is to approximate following h.p. per ton of refrigeration__________________?
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MCQs:  Vertical lines on pressure-enthalpy chart show constant_______________?
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MCQs:  The coefficient of performance is the ratio of the refrigerant effect to the_________________?
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MCQs:  Under-cooling in a refrigeration cycle_________________?
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MCQs:  The suction pipe diameter of refrigerating unit compressor in comparison to delivery side is_________________?
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MCQs:  The advantage of dry compression is that________________?
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MCQs:  For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then_________________?
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MCQs:  One ton of the refrigeration is_________________?
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MCQs:  Short horizontal lines on pressure-enthalpy chart show__________________?
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MCQs:  Ammonia is __________________?
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MCQs:  Mass flow ratio of NH3 in comparison to Freon-12 for same refrigeration load and same temperature limits is of the order of___________________?
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MCQs:  Where does the lowest temperature occur in a vapour compression cycle ?
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MCQs:  A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing pressure of about 67 kg/cm. The refrigerant used is________________?
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MCQs:  Highest pressure encountered in a refrigeration system should be________________?
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MCQs:  If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the h.p. of compressor required will be________________?
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MCQs:  Pick up the correct statement about giving up of heat from one medium to other in ammonia absorption system ?
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MCQs:  Which of the following is not a desirable property of a refrigerant_________________?
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