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1. A Bell-Coleman air refrigeration cycle works as a reversed –
A. Diesel Cycle
B. Otto Cycle
C. Brayton Cycle
D. Stirling Cycle
2. The most suitable pair of refrigerant and absorbent combination for solar refrigeration is –
A. Ammonia and Water
B. Ammonia and Sodium thiocyanide
C. Water and lithium bromide
D. R22 and dimethylformamide
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3. A refrigerator based on reversed Carnot cycle works between refrigeration and condenser temperature of -23 °C and 27 °C. If the cooling rate of 5 kW is desired, what will be the required power in kW?
A. 1
B. 2.5
C. 25
D. 5
4. Ammonia used as a refrigerant is non-corrosive to –
A. iron and steel
B. Copper and Copper alloys
C. Both (A) & (B)
D. None of these
5. In a refrigeration plant, if the condenser temperature increases, then the power input to the compressor will –
A. increase
B. decrease
C. remains the same
D. Unpredictable