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單項(xiàng)選擇題

Which of the following components provides a direct source of seawater for the fire main system?（）

A.Rose box
B.Sea chest or spool piece
C.Sluice valve
D.Fire pump stuffing box

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單項(xiàng)選擇題

Fires involving combustible metals are classified as （）.

A.class "A" fires
B.class "B" fires
C.class "C" fires
D.class "D" fires

單項(xiàng)選擇題

Which of the following gases represents the greatest threat to personnel safety in an engine room where the exhaust is leaking from a diesel engine?（）

A.Carbon dioxide
B.Carbon monoxide
C.Carbon trioxide
D.Hydrogen sulfide

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