单选题A single heavy wire made up for the topping lift is called a（）.A baleB spanner wireC bull lineD working guy

A. to use gloves to pick up the item.

B. to squat and lift from the legs.

C. to have two people bend down and pick the item up.

D. to bend down and lift the item up.

Which part provides for transverse control and positioning of a boom in a conventional yard and stay system ________．

A.Guy

B.Shroud

C.Spider

D.Topping lift

The word horsepower(马力) was first used two hundred years ago.James Watt had made the first widely used steam(蒸气)engine. He had no way of telling people exactly how powerful it much work one strong horse could do in one minute. He called that unit one horsepower. With this unit he could measure the work his steam engine could do.

He discovered that a horse could lift a 3,300-pound weight 10 feet into the air in one minute. His engine could lift a 3,300-pound weight 100 feet in one minute.

Because his engine did ten times as much work as the horse, Watt called it a ten horsepower engine.

6.The passagesays that Watt made the first widely used steam engine.

A.T

B.F

7.Watt made up a unit of measurement based on the strength of a horse.

A.T

B.F

8.Watt wanted to find a way to lift a 3300-pound weight.

A.T

B.F

9.One horsepower would equal the weight a horse could lift.

A.T

B.F

10.The title of the passageis "How the Term Horsepower Came into Being".

A.T

B.F

A bridle for an ocean tow consists of ______.

A.two chains of equal length

B.a single nylon pendant rove through a heavy ring free to move on the pendant

C.two long legs of wire rope shackled to a fishplate

D.a single length of heavy chain with both ends secured on deck to welded pad eyes

With a given load on the cargo hook，tension in a single span topping lift ______.

A.increases as the boom's angle to the horizontal increases

B.is at a maximum when the boom is at a 45° angle to the horizontal

C.increases as the boom's angle to the horizontal decreases

D.decreases as the boom's angle to the horizontal decreases

A deck fitting，used to secure line or wire rope，consisting of a single body with two protruding horns is called a ______．

A.Bitt

B.Bollard

C.Capstan

D.Cleat

A band or collar on the top end of a boom to which the topping lift，midships guy，and outboard guys are secured，is called the ______.

A.collar band

B.guy band

C.pad eye collar

D.spider band