Minimum thickness of wall where single Flemish bond can be used is

Pick up the synthetic resin from the following:

Stones used for ornamental work must be

Soundness test of cement determines

If the iron ore contains clay as an impurity, the flux added during calcination, is

Soundness of cement is tested by

Pick up the correct statement from the following:

The variety of pig iron used for the manufacture of steel by Bessemer process, is

For high grade instruments the steel preferred to, is