Building Materials
Slacking of lime is affected by

None of these
Immersing the lime in water
Keeping it exposed to air
Crushing the lime lumps

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Building Materials
When a brick is immersed in water for 24 hours and then dried, if

10 percent surface is covered with grey or white deposits, the brick has slight efflorescence
50 percent surface is covered with grey or white deposits, the brick has serious efflorescence
No grey or white deposits appear on the surface, the brick is free from soluble salts
All listed here

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