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单项选择题
A.bimetallic type
B.diaphragm type
C.bourdon tube type
D.resistance-temperature type
单项选择题
A.evaporator coils
B.liquid strainer
C.compressor
D.condenser
单项选择题
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
单项选择题
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
单项选择题
A.compressor damage from improper lubrication
B.refrigerant absorption by the lubricant
C.increased viscosity in the lubricant
D.carbon deposit on the compressor suction valves
单项选择题
A.Spring-centered valve
B.Unloading valve
C.Three-position valve
D.Two-position valve
单项选择题
A.Expansion valve
B.Condenser
C.Evaporator
D.Compressor
单项选择题
A.The condenser and the expansion valve
B.The king valve and the solenoid valve
C.The compressor and the expansion valve
D.The condenser and the solenoid valve
单项选择题
A.temperature and pressure
B.humidity and temperature
C.pressure and vacuum
D.pressure and humidity
单项选择题
A.capacity of 0%
B.efficiency of 100%
C.internal slippage of 0%
D.shut off horsepower rating of 100%
