in a straight line
to port
from side to side
to starboard
第1题：
The rudders are amidships and both screws are going ahead．What will happen if the starboard screw is stopped ________．
A.The bow will go to port
B.The bow will go to starboard
C.The bow will remain steady
D.The stern will go to starboard
第2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3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4题：
in a straight line
to port
from side to side
to starboard
第5题：
下列（）为双螺杆挤出机。
第6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7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8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9题：
permits the rudder to move faster
generates more power
can turn without using her rudder
can suck the water away from the rudder
第10题：
discharge current
suction current
sidewise force
thrust