單項(xiàng)選擇題Which one might be used most likely in case of a fire?()

A.lifejacket
B.SCBA
C.lifeboat
D.torch


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1.單項(xiàng)選擇題Which one is not the personal safety equipment?()

A.Life jackets
B.Survival at Sea manual
C.lifeboat
D.torch

2.單項(xiàng)選擇題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

3.單項(xiàng)選擇題A large oil fire is best extinguished with()

A.soda acid
B.foam
C.CO2
D.sand

4.單項(xiàng)選擇題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

5.單項(xiàng)選擇題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