单项选择题

A spreader bar is used to（）.

A.increase the lifting capacity
B.increase the lifting radius
C.protect the slings
D.protect the upper part of a load

点击查看答案&解析

上一题目录下一题

相关考题

单项选择题

A.keeps sparks from falling into an open tank
B.secures covers on ullage openings
C.prevents sparks from getting out of an engine's exhaust system
D.grounds static electricity

单项选择题

A single fitting installed in a pipeline that either blanks off the pipe or allows a full flow passage of a liquid through the pipe is referred to as a（）.

A.blind flange
B.pivot coupling
C.quick-release coupling
D.spectacle flange

单项选择题

A ship crane which has been idle for a period of over six months shall be inspected to the same standards as a（）.

A.yearly inspection
B.quarterly inspection
C.monthly inspection
D.weekly inspection