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Three of the following are properties of a good turbine oil. The exception is

  • A.high resistance to oxidation
  • B.a high viscosity index
  • C.ready emulsification with water
  • D.rapid separation from water

Answer: C

Correct answer: ready emulsification with water

A turbine oil must do the opposite: water inevitably finds its way in, and the oil must release it quickly in the reservoir so that it can be drained. An oil that emulsifies would carry the water round the system. Ready emulsification is wanted in a cutting fluid, where it is the whole point of a soluble oil.

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