單項選擇題The temperature of the refrigerant in the evaporator coil depends mostly upon the ().

A.refrigerant pressure in the evaporator
B.cooling water temperature to the condenser
C.heat load in the refrigerator compartment
D.solenoid valve in the liquid line


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1.單項選擇題Refrigerant is circulated through a refrigeration system by the ().

A.compressor
B.condenser
C.expansion valve
D.evaporator

2.單項選擇題The type of gauge most commonly used to measure pressure is the ().

A.bimetallic type
B.diaphragm type
C.bourdon tube type
D.resistance-temperature type

3.單項選擇題When refrigerant leaves the receiver, it flows next on to the ().

A.evaporator coils
B.liquid strainer
C.compressor
D.condenser

4.單項選擇題A compound gauge is typically installed on the ().

A.suction side of a bilge pump
B.exhaust manifold of an auxiliary diesel
C.discharge line from an air compressor
D.chemical feed tank of an evaporator

5.單項選擇題Which of the listed statements is correct concerning the starting of centrifugal pumps?()

A.They should always be started with the discharge valve closed
B.They should always be started with the discharge valve opened
C.A priming pump is always required to flood the impeller suction
D.They should always be started with the sealing line valves closed