单选题The shear rams of a ship blowout preventer stack are used in emergency well control to（）.A close and seal around the drill pipeB close and seal around casingC cut off pipe inside the preventer stackD close and seal around drill collars

Logbooks are used to record the events occurring when ______.

A.the ship is in a harbor

B.the ship is at anchorage

C.the ship is underway

D.all of the above

Which statement concerning the lashings of containers with solid bar or wire rope lashings is TRUE ________．

A.Stack weights should be less when using a solid bar lashing as compared to a wire lashing

B.Stack heights may be increased when using a solid bar lashing

C.Stack heights should be reduced when using a solid bar lashing

D.Solid bars should be used for lashing the first tier only，with wire lashings on the higher tier（s）

A stack protocol can be used for(69).

A．job scheduler in Operation System

B．operation of arithmetic expressions

C．removing the latest element inserted

D．removing the earliest element inserted

A term applied to the bottom shell plating in a double-bottom ship is ______．

A.bottom floor

B.outer bottom

C.shear plating

D.tank top

The safest procedure used to rig a guy and preventer is to have the guy ______．

A.and preventer have equal stress

B.stronger than the preventer to minimize the danger of separation

C.take a lighter load than the preventer as a safety factor

D.take the stress in case the preventer parts

The storage device for nitrogen-pressurized hydraulic fluid，which is used in closing the blowout preventers is called the ______．

A.Actuator

B.Annulus

C.Accumulator

D.Annular preventer

A low pressure annular preventer which is used to direct flow of kick fluids away from the rig floor is called a ______.

A.dump valve

B.deflector

C.separator

D.diverter

Which of the following statements is TRUE regarding automatic identification systems（AIS）________．

A.AIS cannot be used to make passing arrangements because the system is not capable of this type of ship-to-ship communications

B.AIS cannot be used to make passing arrangements because the ship-to-ship text messaging feature is for emergency use only

C.AIS can be used to make passing arrangements via ship-to-ship text messaging but a vessel operator is not relieved from the requirement to sound whistle signals or make arrangements via bridge-to-bridge radiotelephone

D.AIS can be used to make passing arrangements via ship-to-ship text massaging thus relieving a vessel operator from making such arrangements via bridge-to-bridge radiotelephone or signaling intent to pass via whistle signals