單項選擇題

Fire detecting systems on merchant vessels may be arranged to sense （）.

A.smoke
B.rate of temperature rise
C.ionized particles
D.all of the above

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單項選擇題

On a tank vessel, which of the following substances would be burning in a class "B" fire?（）

A.Oil
B.Wood
C.Rags
D.Electrical wiring

單項選擇題

A class "B" fire would most likely occur in the （）.

A.main switchboard
B.engine room bilge
C.breathing compartment
D.electric fresh water transfer pump