单项选择题

An example of class "A" fire is a/an （）.

A.electrical fire in the engine room
B.oil fire in the engine room bilges
C.oil fire involving a grade "A" petroleum product
D.mattress fire in a stateroom

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单项选择题

The most common type of containment device for spilled oil on the water is the use of （）.

A.straw
B.booms
C.skimmers
D.chemical dispersants

单项选择题

A tank has been sealed and unventilated for a long period of timeWhich of the following conditions does this indicate?（）

A.The tank is safe to enter
B.The tank is especially dangerous to enter
C.Carbon monoxide is present
D.Water vapor present when the tank was sealed has oxidized

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Fires occurring in combustible metals, such as sodium or magnesium, are classified as a （）.

A.class A
B.class B
C.class C
D.class D