First class timber has an average life of

According to ISI, bitumen is classified into

Proper amount of entrained air in concrete results in<br> (i) Better workability<br> (ii) Better resistance …

For one cubic metre of brick masonry, number of bricks required, is

Early attainment of strength in rapid hardening cement is mainly due to

Asbestos . . . . . . . .

Which one of the following polymers is obtained from condensation polymerization?

The rocks in which argil (or clay) predominates, are called

The curved swellings from the growth of layers or wounds left after branches are cut off in an irregular manner are know…