Building Materials
The type of arch generally constructed over a wooden lintel or over a flat arch for the purpose of carrying the load of the wall above is

segmental arch
relieving arch
pointed arch
flat arch

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Building Materials
Asbestos

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

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