轮机英语【二三管】题库

单选题 1分

The spur geared mooring winches have advantages over worm geared ones in ____

  • A. higher efficiency of the gear train while reversing
  • B. the higher gear ratio
  • C. the multi-start feature
  • D. higher recovering speed
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1 单选题 1分
When bilge water is heated in a holding tank, which one of the following statements is not accurate?
  • A. The high temperature facilitates primary gravity separation
  • B. Most of the oil and organic solvents are raised to the top layer
  • C. The high the temperature is, the more the top oil will be collected
  • D. The high temperature has little use on the separation of emulsified oil
4 单选题 1分
Electrical circuits are protected against overheating by means of a/an( ).
  • A. circuit breaker
  • B. amplifier
  • C. diode
  • D. capacitor
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When fighting a spreading fire resulting from a broken fuel line, you should FIRST
  • A. look for a CO2 extinguisher
  • B. use a soda acid extinguisher
  • C. shut off the fuel supply
  • D. smother the fire with rags
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