A.purifying
B.batch
C.long period
D.temporary
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A.center
B.periphery
C.inlet
D.upper parts
A.an oily water separator
B.a purifier
C.a centrifugal compressor
D.a clarifier
A.an oily water separator
B.a purifier
C.a centrifugal compressor
D.a clarifier
A.air
B.black oil
C.water
D.ice cream
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
Which of the following may hardness of the boiler water cause?()
(1) scale formation
(2) tube failure
(3) corrosion
A.(1)and(2)
B.(1)and(3)
C.(2)and(3)
D.(1),(2)and(3)
最新试题
If the suction pressure at the refrigeration compressor is below normal, the cause can be().
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When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should ().
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