Question

The weight of rammer in Modified proctor test is ______________

(a) 4.5 kg

(b) 2.5 kg

(c) 18 lb

(d) 22 lb

The question was posed to me during an interview for a job.

The doubt is from Modified Proctor Test and Harvard Miniature Compaction Test topic in portion Compaction of Geotechnical Engineering I

Answer 1

The correct answer is (a) 4.5 kg

The explanation is: 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. Whereas in Modified proctor test, the layers of the specimen are tested with a free fall of rammer of weight 4.5 kg or 10 lb.