Building Materials MCQ Question with Answer

Building Materials MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

Question No : 29
Pick up the correct statement from the following:

The lime in excess makes the cement unsound and causes the cement to expand and disintegrate

The silica in excess makes the cement stronger but its setting time also increases

The excess amount of alumina weakens the cement

All the above

Question No : 30
Percentage of silica in a good brick earth lies between

5 to 10 %

20 to 30 %

50 to 60 %

70 to 80 %

Question No : 31
Asphalt is obtained from

Petroleum distillation

Bitumen distillation

Plastic distillation

None of these

Question No : 32
Bessemer process is used for the manufacture of

Pig iron

Cast iron

Wrought iron

Steel

Question No : 33
The operation of removal of impurities or clay adhering to iron ores, is known as

Dressing

Calcination

Roasting

Smelting

Question No : 34
The variety of pig iron used for manufacture of wrought iron, is

Bessemer pig

Grey or foundry pig

White forge pig

Mottled pig

Question No : 35
Iron ore may contain

Carbon

Silicon

Phosphorus and manganese

All the above