A.Flash point improvers
B.Pour point improvers
C.Inhibitors
D.Foam suppressors
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A.Low viscosity index
B.Low carbon forming tendencies
C.High film strength
D.High non-corrosive qualities
A.a high viscosity index
B.a low viscosity index
C.neutralize acids
D.resist oxidation at high temperatures
A.resist changes in viscosity with changes in temperature
B.resist emulsification
C.neutralize acids
D.resist oxidation at high temperatures
A.high TBN value
B.low oil floc point
C.low oil demulsibility
D.low oil neutralization number
A.air filtration is inadequate
B.engine coolant leaking into the lube oil
C.fuel oil is leaking into the lube oil
D.the piston rings are excessively worn
最新試題
A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）
Under MARPOL Code the ship to which it applies has to carry （）
During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.
The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated（）
The condensers located in various stages of a flash evaporator are cooled by（）
（）connectors hold best if a wire is accidentally pulled or a connection becomes loose.
The main purpose of port State control is not to（）
For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）
To proceed to the assistance of a ship in distress is（）
The shipboard oil pollution emergency plan will be invalid after （）