Stucco paints are suitable for

The hardest rock is

Name the type of cement from the following for canal linings:

Pick up the hypabyssal rock from the following:

For testing compressive strength of cement, the size of cube used is

Soundness of cement is tested by

Depending on the chemical composition and mechanical properties, iron may be classified as

The commonly used base for iron and steel work, is

Good quality sand is never obtained from