單項(xiàng)選擇題An inert gas system on a tanker should be used to().

A.prevent the generation of flammable or combustible gas in tanks
B.blow out cargo lines to prevent gas concentrations
C.dilute tank atmospheres to keep gas concentrations below the lower explosive limit
D.prevent fires in the pumproom by continually displacing flammable vapors


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1.單項(xiàng)選擇題An inert gas system is designed to reduce the possibility of tank explosions by().

A.eliminating sparks and fire in the vicinity of cargo tanks
B.removing all hydrocarbon gases from the cargo tanks
C.blanketing cargo tanks with inert foam
D.reducing the oxygen concentration below levels necessary for combustion

2.單項(xiàng)選擇題An important step in fighting any electrical fire is to().

A.stop ventilation
B.stop the vessel
C.de-energize the circuit
D.apply water to extinguish the fire

4.單項(xiàng)選擇題An engine compartment gasoline fire requires which type of extinguisher?().

A.Carbon dioxide
B.Dry chemical
C.Foam
D.All of the above

5.單項(xiàng)選擇題An effective method for moving patients with spinal injuries onto a spine board is known as the().

A.pack-strap carry
B.two man extremities carry
C.fireman's drag
D.four man log roll