A.warping head
B.fairlead
C.wildcat
D.capstan
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A.system was overcharged with refrigerant
B.high pressure switch was improperly adjusted
C.expansion valve strainers were fouled
D.suction valves were leaking slightly
A.increased pump speed
B.excessive pump discharge pressure
C.too low of a tilting box angle
D.low pump speed
A.Lube oil passing through the system
B.Moisture or foreign matter collecting at the valve seat and orifice
C.Variable spring tension caused by the changing temperature
D.Frost on the liquid line
A.an immediate crankcase explosion
B.oil contamination in the compressed air
C.a decrease in compressor capacity
D.no immediate loss of the compressed air capacity
A.The density of the air entering the compressor
B.The temperature of the air entering the compressor
C.The designed rotating speed of the compressor
D.A leaking head gasket
A.Differential
B.Trunk
C.Barrel
D.Valve-in-head
A.return to a neutral position
B.flood the evaporator
C.open
D.close
A.control air system
B.forced draft air system
C.supply air system
D.ships service air system
A.dehydrated
B.purged
C.plugged
D.evacuated
A.combustion control air system
B.supply air system
C.ships service air system
D.low pressure deck air system
最新试题
Low compressor head pressure in a refrigeration system can be caused by().
A grease gun is generally used to lubricate a ().
Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by ().
On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is ().
An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of ().
A salinity indicator is used to determine the ().
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should ().
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 ().
Thermostatic expansion valves can be adjusted for ().
Which of the listed pumps is NOT a positive displacement pump?()