默认题库 - 船舶结构基本知识

单选题

The main function of the drawworks on a ship is to（）.

A. transport tubulars from the pipe racks to the derrick floor
B. maintain constant tension on the marine riser
C. store and secure the excess drill line
D. lower and hoist the drill string into and out of the drilled hole

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单选题

The circular steel structure installed around the propeller of a towboat is the（）.

A. nozzle
B. shroud
C. strut
D. hood

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单选题

Structural bulkheads on a ship are usually（）.

A. continuous
B. watertight
C. transverse
D. non-watertight

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单选题

Sidewise force of the propeller tends to throw a vessel’s stern to the right or left，depending on rotation. This force is caused by（）.

A. back current from the rudder
B. greater pressure on the right or left side of the propeller，depending on rotation
C. lower pressure on the right or left side of the propeller，depending on rotation
D. torque from the velocity and angle at which the surrounding water impinges upon the propeller blade

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单选题

Panting frames are located in the（）.

A. after double bottoms
B. centerline tanks on tankers
C. fore and after peaks
D. forward double bottom

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单选题

No deduction is allowed for the（）mess-room in ships having passenger accommodation，which are not also provided with a passengers’ mess-room.

A. officer
B. officers
C. officer's
D. officers&rsquo

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单选题

A large vessel is equipped with a controllable pitch propeller. Which statement is TRUE?（）.

A. When dead in the water，it is often difficult to find the neutral position and slight headway or sternway may result
B. When going directly from full ahead to full astern，there is complete steering control
C. When the vessel has headway and the propeller is in neutral，there is no effect on rudder control
D. When maneuvering in port，full ahead or astern power can usually be obtained without changing shaft RPM

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单选题

When lowering manropes alongside a stage rigged over the side of a vessel，they should be allowed to trail in the water（）.

A. to easily remove the kinks that form in the lines
B. to allow the seamen on the stage to know the direction and strength of the current
C. to provide the seaman something to hold onto if he or she falls from the stage into the water
D. only for short periods of time since they will become waterlogged and be very heavy to pull u

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单选题

Which term refers to a transverse curvature of the deck（）.

A. Deadrise
B. Camber
C. Freeboard
D. Flare

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单选题

Which space（s）is（are）deducted from gross tonnage to derive net tonnage（）.

A. Galley fitted with range or oven
B. Open structures
C. Passenger spaces
D. Boatswain's store

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