Building Materials
Smith's test of stones is performed to find out

The presence of soluble matter of stone
The hardness of the stone
The compressive strength of the stone
The toughness of the stone

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

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