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单选题
三相同步发电机空载运行时,其电枢电流()。
A
为0
B
最大
C
随电压变化
D
可以任意调节
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单选题A large group of stars revolving around a center is known as a().A
clusterB
showerC
constellationD
galaxy
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单选题根据《船舶与海上设施法定检验规则》,有关船舶净吨的说法正确的是:净吨是()对应的吨位。A
指货舱及压载舱的容积B
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单选题Excessive diesel engine back pressure may be an indication of ()A
carbon buildup in the exhaust manifoldB
overcooling of the exhaust manifoldC
eroded muffler baffle platesD
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在首波峰压力转矩的作用下,船首易向低舷一侧偏转B
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单选题下述关于贯穿螺栓的说法中,不正确的是()。A
贯穿螺栓上紧后使气缸体机架与机座三者承受压应力B
贯穿螺栓上紧或松开前必须把主轴承盖上的撑杆螺栓松开C
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单选题In the stowage of deck cargo, cribbing is().A
placed on deck to support the cargoB
separation pieces used to keep cylinders upright and steadyC
shims for stowing balded cargoD
nets placed across the hatch opening to keep the cargo from falling in the hatch
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单选题Your tank vessel is loaded down to her marks, and you find that she has too much trim by the stern,To adjust the trim, you may().A
add ballast forwardB
load more cargo forwardC
shift bunkers forwardD
All of the above
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单选题对集中监视与报警系统来说,某通道闭锁信号的功能特点是()。A
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输出指令,用来闭锁其他通道的声光报警C
输入指令,在某些变工况时,要求闭锁该通道的声光报警D
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单选题A power-driven vessel towing another vessel astern (tow less than 200 meters) shall show ().A
three masthead lights in a vertical line instead of either the forward or after masthead lightB
two masthead lights in a vertical line instead of either the forward or after masthead lightsC
two towing lights in a vertical line at the sternD
a small white light aft of the funnel
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Static electricityB
An open running electric motorC
Loose wiringD
Explosion proof lights
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单选题Which is NOT a mandatory part of the shipboard Oil Pollution Emergency Plan?()A
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单选题AC C20主机遥控系统中,启动封锁功能不包括()。A
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