A good building stone should have which of the following qualities?
i. Uniform texture
ii. Strength
iii. Fire resistance
iv. Hardness

The minimum density (g/cc) of corrugated and semi-corrugated asbestos cement sheets considered acceptable for construction purposes by the Indian standard is:

The actual discharge of liquid through an orifice is determined by multiplying ideal discharge by a factor called coefficient of discharge. The coefficient of discharge is given by __________.