The steel used for rails under heavy traffic and on sharp curves, is

Pick up the correct statement from the following:

The main ingredient of a good quality brick earth, is

Pick up the non-inflammable plastic from the following:

Asbestos cement

In the cement the compound quickest to react with water, is

The kiln which may work throughout the year, is

The most valuable timber may be obtained from

Porcelain is used as :