單項(xiàng)選擇題On a twin-screw,twin-rudder vessel,the most effective way to turn in your own water,with no way on,is to put().

A.one engine ahead and one engine astern,with full rudder
B.one engine ahead and one engine astern,with rudders amidships
C.both engines ahead,with full rudder
D.both engines astern,with full rudder


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1.單項(xiàng)選擇題On a single-screw vessel the stern frame().

A.furnishes support to the rudder,propeller shaft,and transom frame
B.provides foundations for after mooring winches
C.provides foundations for the main propulsion engines
D.transfers the driving force of the propeller to the hull

2.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

3.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

4.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

5.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