reduce the fuel feeding of main engine of inner propeller
reduce the fuel feeding of main engine of outer propeller
firstly reduce the fuel of main engine of inner propeller, then reduce the fuel feeding of engine of outer propeller
reduce fuel feeding of two engines at the same time
第1题：
A vessel fitted with twin screws is easier in ______ than a vessel with single screw．
A.turning maneuver
B.course setting
C.position fixing
D.regulating speed
第2题：
When turning a ship in restricted space with a strong wind，it is normally best to ______．
A.Go ahead on both engines with the rudder hard to one side，if on a twin-screw vessel
B.Back down with the rudder hard to one side，if on a single-screw vessel
C.Take advantage of the tendency to back to port，if on a twin-screw vessel
D.Turn so that the tendency to back into the wind can be used，if on a single-screw vessel
第3题：
The wheel’s order “port five” means that the ship is going to ________
A.turn back
B.turn around
C.turn about
D.alter course
第4题：
下列（）为双螺杆挤出机。
第5题：
A twin-screw ship going ahead on the starboard screw only tends to move ______.
A.in a straight line
B.to port
C.from side to side
D.to starboard
第6题：
A tug is to assist in docking an oceangoing vessel on a hawser. The greatest danger to the tug is ______.
A.from the ship's propeller when making up aft
B.from being overrun if making up forward
C.hull damage while alongside passing a hawser
D.getting in a tripping position
第7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 amidships
第8题：
You may BEST turn a twin-screw vessel about，to the right，in a narrow channel by using ______.
A.Both engines ahead and helm
B.One engine only
C.Port engine ahead and the starboard engine astern
D.Both engines astern and use helm
第9题：
In a twin screw ship going half-ahead,both screws turning outboard and the rudder amidships no current or wind, the vessel will ______.
A.Move bodily to port
B.Move bodily to starboard
C.Move in a zig-zag motion
D.Steer a fairly straight course
第10题：
有时风大流急，船舶靠码头时必须掉头顶流。（）