單項(xiàng)選擇題Which statement is TRUE concerning a towing vessel which,due to the nature of her work,is unable to keep out of the way of another vessel?()

A.By day,she shall carry a black cylinder shape
B.By day,she shall carry two black balls in a vertical line
C.By night,she would show the same lights as a vessel not under command
D.By day,she would show the same shapes as a vessel restricted in her ability to maneuver


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1.單項(xiàng)選擇題Which statement concerning maneuvering in restricted visibility is FALSE?().

A.A vessel which cannot avoid a close-quarters situation with a vessel forward of her beam shall reduce her speed to bare steerageway
B.A vessel which hears a fog signal forward of her beam shall stop her engines
C.A vessel which hears a fog signal forward of the beam shall navigate with caution
D.If a vessel determines by radar that a close-quarters situation is developing,she shall take avoiding action in ample time

2.單項(xiàng)選擇題Which statement concerning an automatic towing engine is FALSE? ()

A.It automatically maintains tow line tension
B.It prolongs the life of the hawser by distributing chafing as the hawser is paid out and taken in
C.As tension on the hawser increases,more line is taken in by the automatic towing engine
D.As tension on the hawser decreases,more line is taken in by the automatic towing engine

3.單項(xiàng)選擇題Which statement about stopping a vessel is TRUE?()

A.A lightly laden vessel requires as much stopping distance as a fully laden vessel when the current is from astern
B.A vessel is dead in the water when the back wash from astern operation reaches the bow
C.A tunnel bow thruster can be used in an emergency to reduce the stopping distance
D.When a vessel is dead in the water any speed displayed by doppler log reflects the current

4.單項(xiàng)選擇題Which is TRUE of a stiff vessel? ()

A.It has a small GM
B.It pitches heavily
C.It has an unusually high center of gravity
D.Its period of roll is short

5.單項(xiàng)選擇題Which characteristic is a disadvantage of a controllable- pitch propeller as compared to a fixed-pitch propeller? ()

A.Slightly higher fuel consumption
B.Lack of directional control when backing
C.Inefficient at high shaft RPM
D.Some unusual handling characteristics