Building materials 1

The melting point of lead is between ......℃

• 655 to 455

• 410 to 510

• 320 to 330

• 200 to 210

Sand stone is an example of

• Igneous rock

• Argillaceous rock

• Siliceous rock

• Calcareous rock

Kankar is impure lime stone of

• Metamorphic

• Igneous

• Sedimentary

• All of the above

Glazing is used to make earthenware

• Hard

• Soft

• Porous

• Impervious

Solder is an alloy of

• Alumina and lead

• Alumina and tin

• Copper and zinc

• Lead and tin

Purest form of coal & contains a majority of carbon, is produced from coal artificially

• Carbon steel

• Coke

• Creep

• Graphite

The crack starting from outside & moving towards pith is

• Star shakes

• Rind galls

• Cup shakes

• Heart shakes

The timber defect caused by the crushing of wood fibres resulting in breakage of continuity of fibres is called

• Knot

• Rind gall

• Foxiness

• Upsets

Defect in painting due to poor adhesion

• Blistering

• Bloom

• Fading

• Flaking

Pigment used in paints for corrosive resistance is ..

• White lead

• Ferrous oxide

• Zinc white

• Read lead