單項選擇題

The purpose of cant frames in steel vessels is（）.

A.To support the overhang of the stern
B.To strengthen the plating against the pounding of the sea
C.To add strength to the deck beams which support the weather deck
D.To support the plating of a cylindrical tank

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單項選擇題

The platform that supports the derrickman when tripping pipe is called the（）.

A.Texas deck
B.water table
C.stabbing board
D.monkey board

單項選擇題

The perforated，elevated bottom of the chain locker，which prevents the chains from touching the main locker bottom and allows seepage water to flow to the drains，is called a（）.

A.cradle
B.draft
C.harping
D.manger

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The purpose of cant frames in steel vessels is（）.

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The platform that supports the derrickman when tripping pipe is called the（）.

The perforated，elevated bottom of the chain locker，which prevents the chains from touching the main locker bottom and allows seepage water to flow to the drains，is called a（）.

The perforated，elevated bottom of the chain locker，which prevents the chains from touching the main locker bottom and allows seepage water to flow to the drains，is called a（）.