A.increased capacity of the compressor
B.more efficient operation of the thermal expansion valve
C.decreased capacity of the compressor
D.loss of receiver capacity
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A.damage to the un-loader operating diaphragm
B.an increase in current flow to the motor
C.high pressure in the receiver and filter
D.an excessive consumption of crankcase oil
A.first stage
B.second stage
C.distillate cooler
D.salt water feed heater
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
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
A.high pressure liquid
B.low pressure vapor
C.high pressure vapor
D.low pressure liquid
A.propeller hub
B.lignum vitae
C.shaft packing
D.labyrinth seal
最新试题
On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is ().
If you are given the job of adding hydraulic fluid to a mooring winch, and are not certain as to the type of fluid to use, you should ().
The usual symptoms of cavitation in a centrifugal pump is ().
The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will ().
One cause of high head pressure occurring in a refrigeration system can be ().
The control mode in which the final control element is moved from one of two flexed positions to the other is known as ().
Thermostatic expansion valves can be adjusted for ().
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?()
Which of the listed pumps is NOT a positive displacement pump?()
An excessive charge of refrigerant in an air-cooled refrigeration system can cause ().