默认题库 - 船舶操纵基本知识

单选题

The biggest problem you generally encounter while towing a single tow astern is（）.

A. the catenary dragging on the bottom
B. swamping of the tow
C. the tow tending to dive
D. yaw

单选题

A twin-screw vessel is easier to maneuver than a single-screw vessel because the twin-screw vessel（）.

A. permits the rudder to move faster
B. generates more power
C. can turn without using her rudder
D. can suck the water away from the rudder

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单选题

A twin screw vessel，making headway with both engines turning ahead，will turn more readily to starboard if you（）.

A. reverse port engine，apply right rudder
B. reverse port engine，rudder amidships
C. reverse starboard engine，apply right rudder
D. reverse starboard engine，rudder amidshi

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单选题

A racetrack turn would be better than a Williamson turn in recovering a man overboard if （）.

A. the man has been missing for a period of time
B. the sea water is very cold and the man is visible
C. there is thick fog
D. the wind was from astern on the original course

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单选题

A reaching course is one in which the wind（）.

A. comes directly over the bow
B. comes directly over the stern
C. comes over an area extending from broad on the bow to the quarter
D. has no effect on the vessel

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单选题

A vessel，which is unable to maneuver due to some exceptional circumstance，shall exhibit （）.

A. during the day，three balls in a vertical line
B. during the day，three shapes，the highest and lowest being balls and the middle being a diamond
C. when making way at night，two all-round red lights，sidelights，and a sternlight
D. when making way at night，masthead lights，sidelights，and a sternlight

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单选题

As a ship moves through the water，it drags with it a body of water called the wake. The ratio of the wake speed to the ship’s speed is called（）.

A. propeller velocity
B. speed of advance
C. wake distribution
D. wake fractio

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单选题

For the deepest water when rounding a bend in a river，you should navigate your vessel（）.

A. toward the inside of the bend
B. toward the outside of the bend
C. toward the center of the river just before the bend，then change course for the river's center after the bend
D. in the river's center

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单选题

If the towing bridle legs are not of equal length（）.

A. excessive strain is placed on the shorter leg
B. the shorter leg may fail
C. the longer leg is slack
D. All of the above

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单选题

In ballasting to survival draft，while in transit，due to extreme wind and wave loads，thrusters or propulsion，if available，should be used to（）.

A. reduce windward mooring tensions
B. maintain vessel heading
C. maximize accelerations
D. increase speed of advance

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