Building Materials
The main constituent of cement which is responsible for initial setting of cement is

dicalcium silicate
tricalcium aluminate
tricalcium silicate
All of these

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

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

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