A.air
B.black oil
C.water
D.ice cream
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A.rather than
B.other than
C.in addition that
D.except for
A.ballast water
B.boiler water
C.bilge water
D.sewage water
A.Boiler
B.Incinerator
C.Oily water separator
D.Sewage treatment unit
A.many thousand times larger than
B.the same as
C.many thousand times smaller
D.none of the above
A.lube oil
B.fuel oil
C.turbine oil
D.grease
最新試題
Which of the listed pumps is NOT a positive displacement pump?（）
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 （）.
When the steering gear is in operation, you should （）.
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by （）.
The usual symptoms of cavitation in a centrifugal pump is （）.
A salinity indicator is used to determine the （）.
If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump （）.
The rate of heat transfer from a hot region to a cold region is affected most by the （）.
If the head pressure of a reciprocating refrigeration compressor is excessive, （）.
Thermostatic expansion valves can be adjusted for （）.