單項(xiàng)選擇題In selecting a tug for moving a vessel，consideration should be given to its（）.

A.indicated horsepower，bollard pull，and displacement
B.indicated horsepower，maneuverability，and displacement
C.indicated horsepower，bollard pull，and maneuverability
D.bollard pull，displacement，and maneuverability


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1.單項(xiàng)選擇題In order to reduce your wake in a narrow channel you should（）.

A.apply enough rudder to counter the effect of the current
B.change your course to a zigzag course
C.reduce your speed
D.shift the weight to the stern

2.單項(xiàng)選擇題In most cases，when a large merchant vessel enters shallow water at high speed the（）.

A.maneuverability will increase
B.speed will increase
C.bow will squat farther than the stern
D.vessel will rise slightly，on a level plane

3.單項(xiàng)選擇題If the situation arose where it became necessary to tow a disabled vessel，which statement is TRUE concerning the towing line?（）.

A.The towing line between the two vessels should be clear of the water
B.The towing line should be taut at all times between the vessels
C.There should be a catenary so the line dips into the water
D.None of the above

4.單項(xiàng)選擇題If a tow sinks in shallow water，you should（）.

A.release it immediately
B.attempt to beach it before it goes under
C.pay out cable until it's on the bottom and place a buoy on the upper end
D.shorten cable to keep it off the bottom

5.單項(xiàng)選擇題Ice blink is（）.

A.the dark appearance of the underside of a cloud layer due to reflection of a surface of open water
B.the soft light appearance on the underside of a cloud layer due to reflection from a surface of open water
C.the yellowish-white glare on the underside of a cloud layer
D.water sky