Building Materials
Gypsum is a

Igneous rock
Mechanically formed sedimentary rock
Chemically precipitated sedimentary rock
Metamorphic rock

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

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
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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Building Materials
Veneering means

Chemically treating timber planks
Thick layer of superior wood glued to inferior wood
Carving out designs on timber planks
Thin layer of superior wood glued to inferior wood

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