A.use
B.release
C.protect
D.effect
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A.paved
B.cleaned
C.welded
D.dismantled
A.water
B.oil
C.heat
D.steam
A.safety valve
B.blow down valve
C.scum valve
D.feed check valve
A.strainers
B.valves
C.elements
D.separators
A.in series
B.in parallel
C.assembled
D.together
最新試題
Low compressor head pressure in a refrigeration system can be caused by().
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 major source of chemical contaminants in hydraulic fluid is ().
The temperature differential occurring between the inlet temperature of the fluid to be cooled and the outlet temperature of the cooling medium in a shell-and-tube heat exchanger is greatest in which of the flow designs listed?()
On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is ().
The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its ().
The output volume of a positive fixed displacement pump can be changed only by ().
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by ().
The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will ().
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?()