海船船员 - 大副

单选题

Which instrument is used to measure the relative humidity of the air ().

A hydrometer
B. A hygrometer
C. A spectrometer
D. A barograph

单选题

When making a Scharnow turn，the ().

A. Rudder must be put over towards the side the man went over
B. Initial turn direction is away from the side the man went over
C. Rudder is put hard over and the initial turn is maintained until about 240° from the original course
D. Man overboard must be not more than 300 feet astern when starting the turn

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单选题

The horizontal plane，perpendicular to the zenith-nadir axis，that intersects with the celestial sphere and is tangent to the earth is called the （).

A. Celestial horizon
B. Sensible horizon
C. Visible horizon
D. Geoidal horizon

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单选题

The Tonnage Certificate gives the ______ of a ship which is classified into gross tonnage and net tonnag

A. specifications
B. descriptions
C. dimensions
D. prescriptions

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单选题

______ is the length of ship measured from extreme points of the ship forward and aft.

A. length overall
B. after perpendicular
C. amidships
D. extreme breadth

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单选题

Clouds are classified according to their （).

A. Size
B. Moisture content
C. Altitude and how they were formed
D. Location in a front

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单选题

Many vessels are provided with flume tanks，which also have a dump tank located under the flume tanks. In the event the ship is damaged，you could dump the flume tanks into the dump tank which would （).

A. Reduce the free surface effect and raise the KG
B. Not have any effect on free surface and raise the KG
C. Reduce the free surface effect and lower the KG
D. Not have any effect on free surface and lower the KG

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单选题

You are operating a twin-screw vessel and lose your port engine.You continue to operate on your starboard engine only.Which action would you take to move your vessel ahead in a straight line （).

A. Compensate with right rudder
B. Compensate with left rudder
C. Surge the starboard engine
D. Rudder amidships - no compensation is necessary on a twin-screw vessel

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单选题

If your vessel will list with equal readiness to either side，the list is most likely caused by （).

A. Negative GM
B. Off-center weight
C. Pocketing of free surface
D. Excessive freeboard

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单选题

All bulk grain carriers shall carry on board the following certificates except ______.

A. cargo information
B. document of authorization for the carriage of grain
C. decision support system for masters
D. cargo ship safety certificate

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