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Which is the liquid that is used in the cleaning of the battery terminals and clamps to avoid corrosion?

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in Automotive Engine Design by (137k points)
Which is the liquid that is used in the cleaning of the battery terminals and clamps to avoid corrosion?

(a) Hydrochloric acid

(b) Dilute sulphuric acid

(c) Liquid ammonia

(d) Liquid nitrogen

I have been asked this question in my homework.

This key question is from Battery Troubles topic in section Storage Batteries of Automotive Engine Design

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Right option is (c) Liquid ammonia

To explain: Due to oxidation the battery terminals and the clamp must be cleaned after regular intervals. After cleaning with a cloth moistened with liquid ammonia, a coat of petroleum jelly helps to retard their corrosion again.

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