A.Mill
B.Round
C.Square
D.Triangular
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A.your work becoming rounded
B.injury to your hand
C.overheating of the file
D.pinning
A.safe for becoming rounded
B.safe for hot work
C.not safe for personnel
D.not safe for hot work
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
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
最新試題
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（）
A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）
The main purpose of port State control is not to（）
The cetane rating of diesel fuel is an indication of the （）
Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?（）
Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）
To proceed to the assistance of a ship in distress is（）
Diesel engine air start system check valves are opened by （）