Building Materials
Index number expressing the relative sizes of both coarse and fine aggregates, is called

Proportioning of aggregates
Fineness modulus
None of these
Grading of aggregates

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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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