Question

In Standard Proctor test, the capacity of the mould is ________ cu.ft.

(a) 1/10

(b) 1/20

(c) 1/30

(d) 1/40

This question was posed to me in unit test.

The origin of the question is Compaction Introduction topic in division Compaction of Geotechnical Engineering I

Answer 1

Correct option is (c) 1/30

For explanation: In Standard Proctor test, the test equipment is a cylindrical metal mould that has an internal effective height of 4.6 inches and an internal diameter of 4 inches. Therefore the volume of the cylinder is, πr^2 h=π*4^2*4.6 cu.in=\(\frac{1}{30}\) cu.ft.