The presence of sand in brick earth prevents:

Pick up the correct statement from the following:

Granite mainly composed of quartz and felsper particles, is obtained from

Formula for quick lime, is

Shingle is

Refractory bricks are

Durability of building stone is affected by its

Iron ore may contain

A 1st class brick immersed in water for 24 hours, should not absorb water (by weight) more than