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________ is used in machines operating at high pressure and slow speeds.

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in Applied Chemistry by (101k points)
________ is used in machines operating at high pressure and slow speeds.

(a) Kerosene

(b) Diesel oil

(c) Heavy oil

(d) Crude oil

This 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

1 Answer

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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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