單項(xiàng)選擇題A tackle by which the outer end of a boom is raised and lowered is the topping().

A.Boom
B.Lift
C.Raise
D.Tackle


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1.單項(xiàng)選擇題A stopper is().

A.A short length of line used for temporarily holding another line
B.A snatch block for handling a topping lift
C.An engine order telegraph
D.The brake on a cargo winch

2.單項(xiàng)選擇題A stay is().

A.Standing rigging
B.A downhaul
C.A halyard
D.A jib

3.單項(xiàng)選擇題A splice that can be used in running rigging,where the line will pass through blocks,is a().

A.Short splice
B.Long splice
C.Back splice
D.Spindle splice

4.單項(xiàng)選擇題A small light tackle with blocks of steel or wood that is used for miscellaneous small jobs is called a().

A.snatch block
B.threefold purchase
C.handy-billy
D.chockablock

5.單項(xiàng)選擇題A single heavy wire made up for the topping lift is called a().

A.Bale
B.Spanner wire
C.Bull line
D.Working guy

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