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Which of the following test helps in the determination of the chemical condition of positive and negative plates of a battery?

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in Automotive Engine Design by (136k points)
Which of the following test helps in the determination of the chemical condition of positive and negative plates of a battery?

(a) Specific gravity test

(b) Cadmium test

(c) Open volt test

(d) High discharge test

The question was asked in an interview for internship.

I need to ask this question from Battery Testing in chapter Storage Batteries of Automotive Engine Design

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Right choice is (b) Cadmium test

To explain: The cadmium test is conducted to know the chemical condition of the positive and negative plates and is performed only when the battery is either on charge or discharge. In the case of the positive terminal the voltage reading should not be less than 2.5 volts and in case of the negative battery,the terminal should not be more than 0.2 volts.

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