BUILDING MATERIALS QUIZ

Second class bricks

Are of dark brown color

Produce a metallic sound when struck

Are under burnt

Are well burnt

TRUE ANSWER : ?
YOUR ANSWER : ?

The steel used for the manufacture of rails, is

Cast steel

Stainless steel

Mild steel

Bessemer steel

TRUE ANSWER : ?
YOUR ANSWER : ?

Clay and silt content in a good brick earth must be at least

50 %

20 %

30 %

40 %

TRUE ANSWER : ?
YOUR ANSWER : ?

Knots in timber are

Signs of branches cut off

Speckled strains

Splits radiating from the centre

Defects caused by crushing fibres

TRUE ANSWER : ?
YOUR ANSWER : ?

Excess of alumina in brick earth makes the brick

Brittle and weak

To lose cohesion

Impermeable

To crack and warp on drying

TRUE ANSWER : ?
YOUR ANSWER : ?

Sea sand used in structures causes

All of these

Dampness

Disintegration

Efflorescence

TRUE ANSWER : ?
YOUR ANSWER : ?

Name the type of cement from the following for canal linings:

Quick setting cement

Sulphate resisting cement

Rapid hardening cement

Pozzolana cement

TRUE ANSWER : ?
YOUR ANSWER : ?

The weight of a good quality brick when immersed in water for a period of 16 hours should not exceed the weight of dry brick

None of these

15 %

10 %

20 %

TRUE ANSWER : ?
YOUR ANSWER : ?

A pug mill is used for

Softening brick earth

Providing brick earth

Tempering brick earth

Moulding brick earth

TRUE ANSWER : ?
YOUR ANSWER : ?

In the method of condensation polymerization,

The reaction proceeds with an evolution of hydrogen chloride

The reaction proceeds with an evolution of ammonia

All of these

Low-molecular substances are removed from the high molecular substance

TRUE ANSWER : ?
YOUR ANSWER : ?