Building Materials
The most common admixture which is used to accelerate the initial set of concrete is

Calcium carbonate
None of these
Gypsum
Calcium chloride

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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
All of these
Tangentially to annual rings, is known as tangential 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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