The safe working load for the assembled cargo gear and the minimum angle to the horizontal

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

Cargo booms must be weight tested to recertify the Safe Working Load（SWL）every ______．

A.Year

B.Two years

C.Four years

D.Five years

What ________ the safe working load of the derrick?

A.is

B.be

C.are

D.has

______is an angle at which a cargo settles in the hold of a ship，between the horizontal and the slope made by a bulk cargo such as grain or iron ore．

A.Angle of loll

B.Angle of inclination

C.Angle of repose

D.Angle of list

When a cargo boom or crane is rated at varying capacities，there will be a table at the controls which relates safe working load to ______．

A.winch speed

B.boom strength

C.load radius

D.cable strength

With a given load on the cargo hook，the thrust on a cargo boom ______.

A.increases as the angle to the horizontal increases

B.increases as the angle to the horizontal decreases

C.is greatest at an angle of 45° and decreases as the boom is raised or lowered

D.is least at an angle of 45° and increases as the boom is raised or lowered

If the cargo gear on your vessel is equipped with a regular guy and a preventer guy，you should ______．

A.Let the schooner guy take most of the strain，thus transferring the load to the opposite boom

B.Leave the preventer guy slack

C.Secure them as close together as possible on deck

D.Secure them so the angle between them is 90° at the boom head

On a crane, the boom indicator tells the operator what angle the boom angle is compared to the ______.

A.vertical position

B.horizontal position

C.boom stop angle

D.minimum radius angle

If an electric cargo winch is being used to lift a draft of cargo and the engine room loses all power，which will occur ________．

A.A pawl，forced by a spring mechanism，will engage the teeth of the bull gear and hold the load

B.An electromagnetic brake will hold the load where it is suspended

C.The load will fall rapidly to the deck unless the foot brake is engaged

D.The load will slowly lower to the deck under control of the drag of the winch motor

In relation to cargo gear, what does SWL mean ?______.

A.Safe working load

B.Ship’s working lift

C.Starboard wing lift

D.Stress, weight, load