單項選擇題

In launching a lifeboat,when should the tricing pendants be released?（）.

A.Before the boat is lowerd from the stowage position
B.As soon as the boat-fall blocks clear the davit head
C.After the limit switch is activated
D.After all people have been embarked

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單項選擇題

In nautical terminology a dog is a（）.

A.crow bar
B.device to force a water tigh door against the frame
C.heavy steel beam
D.wedge

單項選擇題

In order for combustion to occur inside a piping system such as a vapor collection header in a marine emmission control system , there must be（）.

A.fuel
B.oxygen
C.ignition
D.All of the above

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In launching a lifeboat,when should the tricing pendants be released?（）.

你可能感興趣的試題

In nautical terminology a dog is a（）.

In order for combustion to occur inside a piping system such as a vapor collection header in a marine emmission control system , there must be（）.

99色精品-9色在线-99色在线-99色视频国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精