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1. Rating of a domestic refrigerator is of the order of –
(A) 1 to 0.3 tonne
(B) 2 tonnes
(C) 5 tonnes
(D) 10 tonnes
2. Air refrigerator works on ……………….. cycle
(A) Rankine
(B) Bll-coleman
(C) Reversed Carnot cycle
(D) Both (B) and (C)
3. The refrigerator capacity of 165 domestic refrigerator is approximately equal to
(A) 1 tonne
(B) 1.15 tonne
(C) 5 tonne
(D) 8 tonne
4. Air refrigeration cycle is used in
(A) Domestic refrigeration
(B) Gas liquefaction
(C) Commercial refrigeration
(D) All of the above
5. In air conditioning of aeroplanes, using air as a refrigerant, the cycle used is reversed ……….cycle.
(A) Otto
(B) Joule
(C) Brayton
(D) Carnot
6. ……………cycle user air as the refrigerant.
(A) Stirling
(B) Ericsson
(C) Bell – Coleman
(D) Carnot
7. In a refrigeration cycle the heat is rejected by refrigerant at
(A) Condenser
(B) Evaporator
(C) Compressor
(D) Expansion valve
8. In a refrigeration cycle the flow of refrigerant is controlled by
(A) Compressor
(B) Evaporator
(C) Expansion Valve
(D) Condenser
9. The formation of frost on cooling coils in a refrigerator
(A) Improves C.O.P. of the system
(B) Reduces power consumption
(C) Increases power consumption
(D) Increases heat transfer
10. In a refrigeration cycle, the sub-cooling ……C.O.P.
(A) Increases
(B) Does not change
(C) Decreases
(D) None of the above
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