单项选择题
One major disadvantage of a low-speed diesel as compared to a steam main-propulsion system is（）.
A.the extra weight required for the diesel reduction gearing
B.a minimum speed for the engines that limits the minimum speed of the vessel
C.the higher fuel consumption per SHP
D.the low efficiency of the system when a controllable pitch propeller is used
相关考题
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单项选择题
On a vessel with a single propeller，transverse force has the most effect on the vessel when the engine is put（）.
A.full ahead
B.full astern
C.half ahead
D.slow astern -
单项选择题
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 -
单项选择题
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
