單項(xiàng)選擇題

Most lifeboats are equipped with （）.

A.unbalanced rudders
B.balanced rudders
C.contraguide rudders
D.straight rudders

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單項(xiàng)選擇題

While reading the station bill, you find "three (3) short blasts on the whistle and three (3) short tings on the general alarm bells," this signal is for （）.

A.abandon ship
B.dismissal from fire and emergency stations
C.fire and emergency
D.man overboard

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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