A.the purifier driving gears are lubricated by the reclaimed
B.oil as it leaves the bowl all dirt and sludge are automatically discharged with the cooling water
C.sealing water must never be supplied until after oil is fed to the unit
D.deterioration of the bowl ring gasket will cause the purifier to lose its water seal
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A.breaking up solid matter into fine particles
B.precipitating non-decomposed waste in a collection tank
C.chemically adjusting the sewage ph to 7-0
D.eliminating bacterium coli from the sewage
A.100PPM oily water separator
B.Assembling the lube oil purifier as a separator and aligning bilge overboard
C.A 15PPM oily water separator
D.A magnetic duplex strainer
A.insufficient speed
B.cavitation
C.excess discharge pressure
D.excessive net positive suction head B
A.gate valve
B.globe valve
C.swing-check valve
D.plug-cock valve
A.diameter of the discharge piping, with all other factors remaining the same
B.diameter of the suction piping, with all other factors remaining the same
C.width of the impeller only
D.diameter of the impeller
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When does auxiliary burner of incinerator put into operation? （）Ⅰ. start incinerator when it is coldⅡ. the sludge for dealing with is littleⅢ. the sludge for dealing with is largeⅣ. the water and impurity in sludge are too muchⅤ. the temperature in incinerator is lowⅥ. dealing with little solid rubbish
By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a（）
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（） is not installed on the main switchboar.
The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the（）
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