A.Life jacketsB.Survival at Sea manualC.lifeboatD.torch……

单项选择题Water is a very effective fire extinguishing agent because it（）

A.will remove all the toxic fumes from the air
B.has the greatest cooling ability
C.will leave no harmful residue
D.completely removes combustible vapors from the air

单项选择题A large oil fire is best extinguished with（）

A.soda acid
B.foam
C.CO₂
D.sand

单项选择题Fires in escaping flammable gas are quickly brought under control by（）

A.stopping the flow of gas
B.reducing the chemical chain reaction
C.increasing the oxygen supply
D.cooling below the autoignition point

单项选择题If a fire occurs in the boiler room because of a leaking fuel line to a burner, you shut off the fuel using the（）

A.burner valve
B.root valve
C.quick closing valve
D.oil return valve

单项选择题Spontaneous combustion could occur in（）

A.paint thinner in an open can
B.fuel accumulation in the bilge
C.oily rags in an unvented compartment
D.gasoline stored in steel drums