Which one of the following is used for preparing porcelain?

A well seasoned timber may contain moisture up to

The commonly used color pigment in paints, is

Slate is formed by metamorphic action on

Lacquer is

Cast iron contains carbon approximately

The type of arch generally constructed over a wooden lintel or over a flat arch for the purpose of carrying the load of …

The hardest rock is

The most durable varnish is