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Under normal operating conditions, the rudder is hydraulically locked unless （）.

单选题
2022-01-04 02:45
A、the manual trick wheel is engaged for steering
B、the variable stroke pump is off stroke
C、a rudder order is given by the control system
D、an electric power system failure occurs at the steering gear
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正确答案
C
试题解析
标签： 船舶辅助机械
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