BUILDING MATERIALS MCQS SET 03

BUILDING MATERIALS MCQS SET 03

1. Wrought iron contains carbon about
A. 1.5% to 5.5%
B. 0.5% to 1.75%
C. 0.1% to 0.25%
D. none to these.
Answer: Option C
 

2. The main constituent of fly-ash, is
A. aluminium oxide
B. silica
C. ferrous oxide
D. All of these.
Answer: Option D
 

3. Bitumen in
A. solid state, is called asphalt
B. semi fluid state, is called mineral tar
C. fluid state, is called petroleum
D. all the above.
Answer: Option D
 

4.  The plastics made from cellulose resin
A. are as clear as glass
B. are tough and strong
C. possess excellent electrical properties
D. All the above.
Answer: Option D
 

5. Kaolin is chemically classified as
A. metamorphic rock
B. argillaceous rock
C. calcareous rock
D. silicious rock.
Answer: Option B
 

6. Which one of the following is acid resistant asbestos:
A. actinolite asbestos
B. amosite asbestos
C. anthophylite asbestos
D. crocidolite asbestos
E. All the above.
Answer: Option E
 

7. Due to attack of dry rot, the timber
A. cracks
B. shrinks
C. reduces to powder
D. none of these.
Answer: Option C
 

8. Brittleness of cold is due to an excess of
A. sulphur
B. carbon
C. phosphorus
D. silicon.
Answer: Option C
 

9. For the manufacture of Portland cement, the proportions of raw materials used, are
A. lime 63% ; silica 22% ; other ingredients 15%
B. lime 22% ; silica 63% ; other ingredients 15%
C. silica 40% ; lime 40% ; other ingredients 20%
D. silica 70% ; lime 20% ; other ingredients 10%.
Answer: Option A
 

10. Asbestos cement
A. is brittle
B. warps due to changes in humidity
C. strength is lowered when saturated by water
D. all the above.
Answer: Option D