With a given load on the cargo hook，tension in a single span

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 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

What equipment can be used to load cargo?

You are on a multiple-product tanker and scheduled to load a cargo classed as an aromatic amine．This cargo is incompatible with cargoes classed as ______．

A.organic anhydrides

B.ketones

C.phenols

D.esters

Mousing a cargo hook with marline or small line ______.

A.increases the lifting capacity of the hook

B.protects the hook from the sling ring

C.prevents the sling ring from coming out of the hook

D.All of the above

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