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Gear oils on adding viscosity index improves can be used in ___________

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Gear oils on adding viscosity index improves can be used in ___________

(a) Motor vehicles

(b) Machinery

(c) Air crafts

(d) Engines

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Origin of the question is Types of Additives in portion Lubricants of Applied Chemistry

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The correct option is (c) Air crafts

For explanation: Gear oils on improving the viscosity, they can be used in air crafts. There are some other materials that can be used in air crafts by increasing their viscosity are multi grade automotive engine oils and automatic transmission oils.

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