Higher pitch of the roof
i) results in stronger roof
ii) results in weaker roof
iii) requires more covering material
iv) requires less covering material
The correct answer is

Crushing strength of a good building stone should be more than

The softest rock is

The slag which floats on the surface of the molten iron generally contains

According to IS 399-1963, the weight of the timber is specified at

The normal consistency of ordinary Portland cement is about

Bulking of sand is caused due to

Pick up the polymineralic rock from the following:

Good quality stones must