A.compressor
B.condenser
C.receiver
D.evaporator
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A.secure and tag the electrical circuit
B.place a crow bar in the flywheel of the unit
C.inform all persons in the area not to start the unit
D.make a log book entry
A.stuffing box diameter
B.direction of rotation of the screws
C.pitch of the screws
D.type of driving gears
A.dew point temperature
B.condensation temperature
C.psychometric temperature
D.absolute humidity temperature
A.low viscosity index
B.high viscosity index
C.high neutralization number
D.low demulsibility quality
A.Loss of suction
B.Increased clearances
C.Decreased clearance
D.Decreased slippage
最新試題
On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is （）.
Which of the problems listed would came the discharge temperature of an R-12 refrigeration compressor to increase?（）
If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.
The general purpose of a heat exchanger is to （）.
Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?（）
The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will （）.
A pressure drop through the refrigerant liquid line may cause （）.
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by （）.
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?（）
A grease gun is generally used to lubricate a （）.