Gypsum is a

Rocks formed due to alteration of original structure due to heat and excessive pressure are called

The internal size of mould used in brick preparation is

The ratio of the thickness of web to that of flange of steel rolled structural beams and channels is

The commonly used base for iron and steel work, is

The pressure acting on the stones in stone masonry construction should be

Percentage of silica in a good brick earth lies between

Stones used for ornamental work must be

Blister steel