Building Materials
Asbestos

Is a natural fibrous mineral substance
Is composed of hydrous silicates of calcium and magnesium (CaSiO3, 3MgSiO3)
All of these
Contains iron oxide and alumina

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Building Materials
Pick up the correct statement from the following: Method of sawing timber

All of these
Tangentially to annual rings, is known as tangential method
In four quarters such that each board cuts annual rings at angles not less than 45°, is known as quarter sawing method
Cut out of quarter logs, parallel to the medullary rays and perpendicular to annual rings, is known as radial sawing

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Building Materials
Distemper is

A water proofing agent
A drying agent
A paint consisting of colored cement and water
A paint consisting of powdered chalk, pigments and water

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