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单选题
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
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更多 “单选题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 gearingB a minimum speed for the engines that limits the minimum speed of the vesselC the higher fuel consumption per SHPD the low efficiency of the system when a controllable pitch propeller is used” 相关考题
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单选题Which characteristic is a disadvantage of a controllable- pitch propeller as compared to a fixed-pitch propeller? （）A
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Lack of directional control when backingC
Inefficient at high shaft RPMD
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