A.checking the area for items that may catch fire
B.that a fire watch be posted
C.checking for the explosive gases
D.all of the above
您可能感興趣的試卷
你可能感興趣的試題
A.Flash point improvers
B.Pour point improvers
C.Inhibitors
D.Foam suppressors
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
最新試題
Engine parameters shall be corresponded to NOx Technical Files. This is required by （）
Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
To shut down a diesel engine after it exceeds the set maximum speed，which type of device listed should be used?（）
The shipboard oil pollution emergency plan will be invalid after （）
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
The condensers located in various stages of a flash evaporator are cooled by（）
If separating effect is not good, which measure should be taken （）
For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）
A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）
One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is（）