Which of the following statements is
correct about lubrication coolants?
स्नेहन शीतलक के बारे में निम्नलिखित में से कौन सा कथन सही है?
Engine coolants should have high viscosity
Coolants used during machining should have high viscosity
Viscosity should vary according to temperature for a good lubricant.
None of these
None of these
Engine coolants should have low
viscosity. Coolants used during machining should also have low viscosity. Viscosity
should not vary according to temperature for a good lubricant because there are
always variation of temperature in engine.
Hence, the correct option is (D).
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