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单选题
（） system is arranged to ensure that water can be drawn from any tank or the sea and discharged to any other tank or the sea as required to trim the vessel.
A
The domestic water
B
Bilge water
C
Oil transfer
D
The ballast
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单选题（） is arranged for cleaning the lubricating oil in the system and clean oil can be provided from a storage tank.A
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单选题Oil pressure in the lubrication system is （） the static sea water head to ensure that sea water （） the stem-tube.A
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单选题In a closed cooling system for a turbocharged, four-stroke/cycle diesel engine, fluctuating water pressure can be caused by （）A
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单选题The fuel from the bunker tanks must be treated by before entering the service tanks（）, from where the fuel enters（）A
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To test the starting systemB
To remove air bubbles from the jacket waterC
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To ensure foreign material (water etc) is not present in the cylinders
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单选题In a diesel engine cooling system, the high temperature alarm contact maker will be activated on excessively high water discharge temperature from the （）A
raw water pump dischargeB
expansion tank outletC
cooling water heat exchangerD
outlet engine jacket water outlet
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leaky pipeB
opened inlet valveC
too much water in tankD
None of the above
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an oily water separatorB
a purifierC
a centrifugal compressorD
a clarifier
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purge lube oil from the liquid refrigerantB
recover water purged from the systemC
separate foul gases from the receiverD
purge non-condensable gases without losing refrigerant
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单选题（）are used to ensure that ships don’t discharge oil when pumping out oily water from any oil contaminated space.A
BoilerB
IncineratorC
Oily water separatorD
Sewage treatment unit
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