Engineering :: Refrigeration and Air conditioning

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91.

The type of compressor used in refrigeration system is

A.	Reciprocating	B.	Centrifugal
C.	Rotary sliding vane	D.	Rotary screw compressor
E.	All of the above

92.

A hermetic compressor is

A.	A reciprocating compressor	B.	A valveless compressor
C.	A thermodynamically efficient comprossor	D.	A factory sealed unit containing motor and compressor
E.	None of the above

93.

In a refrigeration system a condenser

A.	Receives liquid refrigerant and supplies liquid refrigerant	B.	Receives vapour refrigerant and supplies vapour refrigerant
C.	Receives vapour refrigerant and supplies liquid refrigerant	D.	Receives liquid refrigerant and supplies liquid refrigerant
E.	None of the above

94.

The function of desuperheating coil in a condenser is

A.	To remove heat from condenser	B.	To improve performance of a condenser
C.	To discharge the heat exchanged in condenser to the surroundings	D.	To remove the heat of superheat of the refrigerant before it enters the condenser
E.	None of the above

95.

In a refrigerator evaporator is located

A.	On the bottom of refrigerator cabinet	B.	Behind the refrigerator cabinet
C.	Adjacent to compressor	D.	Inside the refrigerator cabinet
E.	On the side of condenser

96.

If a refrigerator compressor cuts out on starter overloads the probable reason could be

A.	Low line voltage	B.	Suction pressure high
C.	Discharge pressure high	D.	Compressor tight
E.	Any of the above

97.

A thermometer in vapour compression system is installed in the main line close to the compressor

A.	As it helps the operator to adjust compressor for greatest efficiency	B.	As temperature indicates whether liquid or vapour refrigerant is going to compressor
C.	As temperature helps in calculating the coefficient of performance	D.	As the performance of other units of the cycle can be controlled
E.	None of the above

98.

A thermometer in the compressor discharge line

A.	Confirms the flow of refrigerant	B.	Indicates the efficiency of cycle
C.	Helps in adjusting the compressor performance	D.	Shows the heat of refrigerant leaving the cylinder on way to the condenser
E.	None of the above

99.

A prssure gauge on the discharge side of compressor

A.	Indicates the temperature of refrigerant after compression	B.	Gives an ideas about the coefficient of performance of the cycle
C.	Gives a warning when the pressure reaches a dangerous point	D.	Confirms the flow of refrigerant in cycle
E.	Is mounted for show only

100.

Out of the following refrigerants which one will provide highest compressor displacement per tonne of refrigeration in a vapour compression system operating between fixed temperatures

A.	Ammonia	B.	Freon 11
C.	Freon 12	D.	Freon 22
E.	Carbondioxide