A.Gravity siphon effect
B.Higher vacuum in the second-stage
C.Difference in brine density between first and second stages
D.lower pressure in first-stage
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A.decreased compression ratio
B.higher than normal power consumption
C.un-loader malfunction
D.water in the lubricating oil
A.reduce friction between moving surfaces
B.provide even distribution of bearing wear
C.reduce the accumulation of harmful detergents
D.maintain a constant oil temperature output at each beating
A.vapor feed heater
B.air ejector condenser
C.saltwater heater
D.distillate cooler
A.ballast tanks
B.sludge tanks
C.machinery space bilges
D.cargo hold bilges
A.excessive drive motor speed
B.excessive pump discharge pressure
C.too low of a tilting box angle
D.insufficient drive motor speed
最新試題
If the head pressure of a reciprocating refrigeration compressor is excessive, （）.
Which of the following statements is correct concerning heat transfer?（）
The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will （）.
Low compressor head pressure in a refrigeration system can be caused by（）.
The general purpose of a heat exchanger is to （）.
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 （）.
A pressure drop through the refrigerant liquid line may cause （）.
On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is （）.
Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?（）