BUILDING MATERIALS QUIZ

Ultimate strength to cement is provided by

Tri-calcium silicate

Tri-calcium aluminate

Tetra calcium alumino ferrite

Di-calcium silicate

TRUE ANSWER : ?
YOUR ANSWER : ?

When a brick is immersed in water for 24 hours and then dried, if

All listed here

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

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

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

TRUE ANSWER : ?
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Bulking of sand is caused due to

Clay contents

Surface moisture

Viscosity

Air voids

TRUE ANSWER : ?
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Good quality stones must

Resist action of acids

Be durable

Be free from clay

All of these

TRUE ANSWER : ?
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Pick up the compound responsible for early strength of cement from the following:

Tri-calcium silicate

Tri-calcium aluminate

Di-calcium silicate

Tetra-calcium alumino-ferrite

TRUE ANSWER : ?
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Red short iron cracks when bent due to the presence of

Sulphur

Silicon

Phosphorus

Carbon

TRUE ANSWER : ?
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The preparation of surface of stone to obtain plain edges or to obtain stones of required size and shape is known as

Quarrying of stones

Seasoning of stones

Dressing of stones

Blasting of stones

TRUE ANSWER : ?
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Inner part of a timber log surrounding the pitch, is called

None to these

Heart wood

Cambium layer

Sapwood

TRUE ANSWER : ?
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A 1st class brick immersed in water for 24 hours, should not absorb water (by weight) more than

25 %

20 %

10 %

15 %

TRUE ANSWER : ?
YOUR ANSWER : ?

Paints with white lead base are suitable for painting of

Iron work

None of these

Both wood work and iron work

Wood work

TRUE ANSWER : ?
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