Question

In Standard Proctor test, the weight of rammer is ________

(a) 4.5 kg

(b) 18 lb

(c) 2.5kg

(d) 20 lb

The question was asked during an internship interview.

My query is from Compaction Introduction topic in division Compaction of Geotechnical Engineering I

Answer 1

Correct choice is (c) 2.5kg

To explain I would say: In Standard Proctor test, the layers of the specimen are tested with a free fall of rammer of weight 2.5 kg or 5.5 lb. The test consists in compacting at various water contents.