0n cargo booms,preventers are（）.

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• What is/are the advantage（s）of cranes over conventional cargo booms（）.

  A . Cranes are able to pick up and drop loads over a greater spotting area B . Increased safety because the deck is clear of running and standing rigging C . Simplicity of operation of the crane by its operator D . All of the above

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• opes or wires attached to derricks to prevent them from swinging during cargo handling operations are（）.

  A . Preventers B . Side ropes C . Stays D . Guide line

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• A cargo boom is a（）.

  A . double sized mattress consists of more than 890 coils B . spar extending from a mast or a king post C . flap（Becker rudder）can be fitted to the rudder’s trailing edge D . bridle arrangement having a long beam of the length of the container

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• 0n the fully containerized ship, approximately one-third or more of the cargo is on deck above the rolling center. Top stowed containers are subject to（）.

  A . acceleration greater than on conventional vessels B . acceleration less than on conventional vessels C . acceleration the same as on conventional vessels D . no acceleratio

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• The purpose of a preventer as it is used on a conventional yard and stay cargo rig is to（）.

  A . allow greater than normal loads to be handled by the gear B . act as an inboard guy in the event the inboard guy parts during cargo handling C . assist the outboard guy in supporting stresses during cargo handling D . prevent the inboard guy from parting due to stresses during cargo handling

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• 0n a vesel proceeding from a very cold to a warm climate with a cargo of a nonhygroscopic nature in the holds, which is true?（）.

  A . Danger of heavy ship sweat exists; constant and vigorous ventilation is required B . There is danger of heavy cargo sweat if outside air is introduced by ventilation C . There is little danger of ships sweat, slight possibility of cargo sweat; moderate ventilation is needed D . The po sibility of any sweat problem, either cargo or ship, is frame

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• APUGEN控制电门在“0N”位，“0FF”灯亮表明：（）。

  A . APU停车 B . APU正常工作，APB和EPC都断开 C . APU正常工作，APB断开，EPC闭合 D . 以上都不对

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• The boom indicator tells the operator at what angle the boom is compared to the（）.

  A . horizontal position of the boom B . vertical position of the boom C . horizontal position of the load being lifted D . vertical position of the load being lifted

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• On your vessel，a wire rope for the cargo gear shows signs of excessive wear and must be replaced. In ordering a new wire for this 10-ton boom，what safety factor should you use?（）

  A . Three B . Five C . Six D . Seve

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• 已知测者纬度35°10.0N，天体赤纬10°30.0N，天体地方时角21°23.5E，天体的计算高度等于（），半圆计算方位等于（）。

  A . A．58°34.9；136°.5NE B . B．58°34.9；136°.5NW C . C．40°03.0；152°.1NE D . D．40°03.0；152°.1NW

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• 0n 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

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• On cargo booms，preventers are（）.

  A . auxiliary guys B . extra fair leads C . steel bands D . sto

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• Pinching of the cargo hose between the vessel and the dock should be prevented by（）.

  A . adjusting the hose supports B . laying out an excess length of hose on deck C . tying off the topping lifts and runners to winch heads D . All of the above

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• 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

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• For a given weight of cargo，the stress on the heel block of a cargo boom（）.

  A . increases as the cargo closes the head while hoisting B . increases if the cargo runner is doubled up C . decreases as the boom is topped to a greater angle D . is determined by the thrust stresses on the boom

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• 0ur jumbo boom can（）20 tons.

  A . lift B . rise C . elevate D . hoist

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• R－0N－T

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• Our jumbo boom can（）20 tons.

  A . lift B . rise C . elevate D . hoist

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• A boom vang（）.

  A . holds the boom down and flattens the main sail B . draws the head of the sail to windward C . tautens the standing rigging D . douses the gaff topsail

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• What is meant by spotting the boom?（）

  A . Lowering it into a cradle B . Placing it in a desired position C . Spotting it with wash primer and red lead D . Two-blocking it

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

  A . year B . two years C . four years D . five year

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• According to the regulations，to prevent excessive pressure buildup in cargo tanks containing LFG，they are fitted with（）.

  A . pressure vacuum relief valves B . excess flow valves C . safety relief valves D . flame scree

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• 如信用证允许货物装在舱面上，提单亦已注明“0n Deck”，则保险单也应注明“0n Deck”，并加保“Jettison and/Washing Overboard”附加险。 （）

  此题为判断题(对，错)。

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• 给出生成下列语言的CFG： {1n0m1m0n|m,n>=0}

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