Construction and Building Materials Practice Test 9

1. ___________ is used for the production of clay in nature.

Orthoclase felspar

Styrene

Ortho sulphur

Monoclinic sulphur

2. The thickness of steel mould is usually ________

6 cm

2 mm

6 mm

2 cm

3. Which of the following substances is not used as a decolorizer in the manufacturing of glass?

Antimony oxide

Potassium carbonate

Cobalt oxide

Manganese dioxide

4. Which of the following is not true about fibreglass?

Fibreglass is flexible

Fibreglass readily absorbs water

Fibreglass is soft to touch

Fibreglass is fire-proof

5. ________________ crane is used for open sites and it possesses a very long reach.

Cable

Swing jib

Goliath

Derrick

6. Glass becomes hard on heating.

False

True

7. _________________ are extra wagons attached to the tractors or trucks.

Dumper

Trailers

Conveyors

Elevators

8. _______ is used to indicate pieces of broken glass or waste glass.

Decolorizer

Sodium bicarbonate

Sand

Cullet

9. The resistance to water of acid-resistant cement is increased by adding __________ of linseed oil.

0.15%

2.50%

0.50%

2.75%

10. What is the correct order in which clay for bricks is prepared?

Tempering, digging, blending, weathering, cleaning and unsoiling

Cleaning, digging, tempering, weathering, unsoiling and blending

Unsoiling, digging, cleaning, weathering, blending and tempering

Digging, tempering, cleaning, weathering, unsoiling and blending