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單項(xiàng)選擇題

Hydrocarbon vapors are usually detected by the use of the （）.

A.flame safety lamp
B.combustible gas indicator
C.gasometer
D.oxygen indicator

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單項(xiàng)選擇題

A fire involving trash and paper waste would be classified as a （）.

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

單項(xiàng)選擇題

A fire in a pile of dunnage would be classified as a （）.

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

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