【名词&注释】
动力系统(dynamic system)、效率高(high efficiency)、使用方便(easy to use)
[单选题]船舶有效功率是指船舶航行时()的功率。
A. 主机所发出
B. 克服船体阻力消耗
C. 主机100%标定点
D. 最大航速时主机发出
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学习资料:
[单选题]动力系统是为()服务的管路系统.
A. 推进装置
B. 辅助装置
C. 甲板机械
D. A+B
[单选题]单轴系具有直接传动、结构简单可靠、()和()的特点。
A. A.效率高/使用方便
B. B.传动损失小/便于操纵
C. C.消耗功率少/操纵灵活
D. D.传动准确/便于操纵
[单选题]An overspeed safety device is usually fitted to a generator engine for () in the event of overspeed.
A. cutting power off the engine
B. increasing the fuel pump setting
C. braking the crankshaft
D. stabilizing the ship speed
[单选题]If the feed pump for an auxiliary boiler fails to deliver the feed water to the boiler, the cause maybe ().
A. high steam pressure in the boiler
B. abnormally high feed water temperature
C. abnormally high boiler water temperature
D. steam demand exceeding feed pump capacity
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