Sandstone is a
(i) Sedimentary rock
(ii) Aqueous rock
(iii) Siliceous rock

The percentage of alumina and silica in good fire clay vary respectively is

Sea sand used in structures causes

Paints with white lead base are suitable for painting of

As per IS specifications, the maximum final setting time for ordinary Portland cement should be

Putty is

The steel used for the manufacture of rails, is

Jhumb bricks are

The cast iron when heated to red heat with powdered red haematite in an oven for increasing its toughness, is converted …