Pick up the correct statement from the following:

Soundness of cement is tested by

Pig iron is manufactured from the ores by

Granite is not suitable for ordinary building purpose because

For the manufacture of plywood, veneers are placed so that grains of adjacent veneers

Plywood has the advantage of

Bituminous fells are used for

The compound of Portland cement which reacts immediately with water and also sets first is

The percentage of alumina in a good brick earth lies between