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______ Meter is used to measure the Glycol and water ratio present in the coolant?

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in Automotive Engine Design by (137k points)
______ Meter is used to measure the Glycol and water ratio present in the coolant?

(a) hydrometer

(b) refractometer

(c) galvanometer

(d) voltmeter

The question was posed to me during an online interview.

This is a very interesting question from Coolants in section Cooling System of Automotive Engine Design

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The correct answer is (b) refractometer

To explain I would say: Refractometer is used to measure the glycol water ratio because it offers the best method to identify the precise glycol content of the coolant.

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