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________ is used in machines operating at high pressure and slow speeds.(a) Kerosene(b) Diesel oil(c) Heavy oil(d) Crude oilThis question was posed to me during an interview for a job.My question is based upon Viscosity and Viscosity Index topic in division Lubricants of Applied Chemistry

Answer»

Correct option is (c) Heavy oil

For explanation I would SAY: Heavy oil is used as a lubricant in the machines that are operated at low SPEED under HIGH pressure. The heavy oil is used as it has resist the squeezing between the rubbing PARTS while operating the MACHINE.



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