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單項選擇題

The extension of the after part of the keel in a single-screw vessel upon which the stern post rests is called the（）.

A.boss
B.knuckle
C.skeg
D.strut

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單項選擇題

The exhaust pipe must be gas tight throughout its entire length otherwise（）.

A.bilge water may enter the exhaust pipe
B.entry of air may cause vapor lock
C.carbon monoxide may enter the interior of the vessel
D.the joint gaskets may be blown

單項選擇題

The connected joints of pipe，usually made of three joints of pipe approximately 90 feet long，racked in the derrick when making a trip are called a（）.

A.string
B.stand
C.joint
D.standpipe

The extension of the after part of the keel in a single-screw vessel upon which the stern post rests is called the（）.

你可能感興趣的試題

The exhaust pipe must be gas tight throughout its entire length otherwise（）.

The connected joints of pipe，usually made of three joints of pipe approximately 90 feet long，racked in the derrick when making a trip are called a（）.

The connected joints of pipe，usually made of three joints of pipe approximately 90 feet long，racked in the derrick when making a trip are called a（）.