Building Materials
Slacking of lime is affected by

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

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Building Materials
A queen closer is a

Brick laid with its length parallel to the face or direction of wall
Brick with half the width at one end and full width at the other
Brick having the same length and depth as the other bricks but half the breadth
Brick laid with its breadth parallel to the face or direction of wall

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