Building Materials
A queen closer is a

Brick laid with its length parallel to the face or direction of wall
Brick laid with its breadth 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

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Building Materials
The thermosetting plastic

Chars at 343°C
All listed here
Becomes rigid when moulded at suitable pressure and temperature
At 127°C to 177°C permanently set and further application of heat does not soften it

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Building Materials
Asbestos

Is composed of hydrous silicates of calcium and magnesium (CaSiO3, 3MgSiO3)
Is a natural fibrous mineral substance
All of these
Contains iron oxide and alumina

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