A.Flash point improvers
B.Pour point improvers
C.Inhibitors
D.Foam suppressors
您可能感興趣的試卷
你可能感興趣的試題
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 （）
For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）
The cetane rating of diesel fuel is an indication of the （）
To proceed to the assistance of a ship in distress is（）
Engine parameters shall be corresponded to NOx Technical Files. This is required by （）
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
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
Cold weather starting of a diesel engine may be made easier by（）
“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）
During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.