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The plastic index is calculated from the relation ____________

(a) IP = WP-WL

(b) IP = WL-WP

(c) IP= IL-IS

(d) IP=IW-IS

I got this question during an interview.

This intriguing question originated from Determination of Liquid and Plastic Limit in section Index Properties Determination of Geotechnical Engineering I

1 Answer

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by (727k points)
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Best answer
Right choice is (b) IP = WL-WP

The best I can explain: The plasticity index is given by the formula, IP=WL-WP.

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