轮机英语【二三管】题库

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The amount of remaining positive suction head required at the pump suction to affect the designed de...

The amount of remaining positive suction head required at the pump suction to affect the designed delivery rate is known as the _______
  • A.available NPSH汽蚀余量
  • B.allowable NPSH
  • C.required NPSH
  • D.suction lift
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1 单选题 1分
An operational amplifier, as used in today’s consoles, has a calculated gain of 5. This means that when the input changes ______
  • A.5 volts, the output changes 10 volts
  • B.10 volts, the output changes 5 volts
  • C.2 volts, the output changes 10 volts
  • D.10 volts, the output changes 2 volts
3 单选题 1分
4 单选题 1分
After received the “finished with engine “order from bridge , which of the following operation is false ?
  • A..shut off the main starting valve
  • B. Stop the fuel oil booster pump and shut off the correspondence valves
  • C. Stop the sew water pump immediately and shut off the correspondence valves
  • D. Stop the jacket water pump immediately and shut off the correspondence valves
5 单选题 1分
Power is supplied through ___to larger auxiliaries at the __voltage
  • A.circuit breakers , low
  • B.circuit breakers, high
  • C.Exciters , low
  • D.Exciters ,high
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