SSC JE Mechanical Engineering 25 Sep 2019 Shift 1 Paper

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Question : 174 of 200

Marks: +1, -0

Select the incorrect statement from below about good quality lubricating oils.

They do not affect the mechanical efficiency of the engine
They reduce frictional resistance in bearings
They should have low viscosity at low temperature for ease of starting
They assist in sealing of piston during operation

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