Question

Elongation index of coarse aggregates is calculated using:

(a) E=w1/w2

(b) E=w2/w1

(c) E=w2-w1

(d) E=w2+w1

The question was posed to me in an online quiz.

My doubt is from Coarse Aggregates in division Materials for Construction of Basic Civil Engineering

Answer 1

Correct choice is (a) E=w1/w2

To explain I would say: Elongation index is obtained as a percentage.  E=w1/w2 where w1 is the weight of particles retained in length gauge and w2 is the weight of test sample.