BUILDING MATERIALS QUIZ

Has a higher strength to weight ratio

All listed here

Retains heat-longer

Is shock proof and fire retardant

Shingling

Refining

Pudding

All of these

Ballast in railways

Road metal

All listed here

Aggregates for concrete

Both (i) and (ii)

Only (i)

All (i), (ii) and (iii)

Both (i) and (iii)

CaSO4 and H₂O

Lime and H₂O

H₂S and CO₂

CO₂ and calcium

Alkalies and magnesium

Silica and alkalies

Alumina and iron

Lime stone and alumina

Is a natural fibrous mineral substance

Is composed of hydrous silicates of calcium and magnesium (CaSiO3, 3MgSiO3)

All of these

Contains iron oxide and alumina

10 percent surface is covered with grey or white deposits, the brick has slight efflorescence

All listed here

No grey or white deposits appear on the surface, the brick is free from soluble salts

50 percent surface is covered with grey or white deposits, the brick has serious efflorescence

Sedimentary metamorphic rocks

Metamorphic rocks

Sedimentary rocks

Igneous rocks

All of these

Be free from clay

Resist action of acids

Be durable