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Assertion: viscosity is the property that matters in every lubrication regime. Reason: it determines the thickness of the film the bearing can build.

  • A.both the assertion and the reason are true but the reason does not explain the assertion
  • B.the assertion is true but the reason given for it is false
  • C.the assertion is false although the reason offered is a true statement in itself
  • D.both the assertion and the reason are true and the reason explains the assertion

Answer: C

Viscosity does govern the hydrodynamic film, which is what the reason states, but once the film has been squeezed out the duty is boundary and oiliness or additive chemistry takes over. The assertion overreaches by saying every regime.

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