Related Questions

If a truck can carry 10 to 16 boxed refrigerators, then what is the least number of refrigerators that 4 trucks can carry?
A 40
B 52
C 48
D 64
Frost formation on the evaporator tubes in the domestic refrigerators
A Can be prevented by proper design
B Decreased compressor power
C Causes heat loss due to poor heat transfer
D Is immaterial
Most of the domestic refrigerators work on the following refrigeration system
A Vapour compression
B Vapour absorption
C Carnot cycle
D Electrolux refrigerator
The bank of tubes located at the back of the domestic refrigerators are the __________ tubes.
A Refrigerant cooling
B Evaporator
C Condenser
D Throttling
The commonly used coolant in refrigerators is
A Ammonia
B Nitrogen
C Freon
D Oxygen
The evaporator used in household refrigerators is
A Frosting evaporator
B Non-frosting evaporator
C Defrosting evaporator
D None of these
Which of the following motors is usually used in household refrigerators?
A D.C. shunt motor
B D.C. series motor
C Single phase induction motor (split phase start or induction run motor)
D Reluctance motor
The refrigerant used for absorption refrigerators working on heat from solar collectors is a mixture of water and
A Carbon dioxide
B Sulphur dioxide
C Lithium bromide
D R-12
Refrigerators keep food unspoiled because ---
A at its low temperature, bacteria and moulds are inactive
B at its low temperature, the germs are killed
C at its low temperature, the germs are frozen
D it sterilizes the food
In refrigerators, the temperature difference between the evaporating refrigerant and the medium being cooled should be
A High, of the order of 25°
B As low as possible (3 to 11°C)
C Zero
D Any value

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