FINE AGGREGATES

1. Fine Aggregates should pass through which IS sieve?

• a) 2.35mm

• b) 45µ

• c) 4.75mm

• d) 75µ

2. How many types of fine aggregates are there based on source?

• a) 3

• b) 2

• c) 4

• d) 6

3. The specific gravity for sand is:

• a) 2.6

• b)2.65

• c) 2.8

• d) 2.75

4. aggregates are very important ingredients of concrete because

• A. provides structural stability

• B. provide good finish

• C. acts as a filler material

• D. all of the above

5.What is the total percentage of aggregates in concrete by volume?

• a)50-60%

• b)60-75%

• c)85%

• d) 50%

6.What is the size of coarse aggregates?

• (a) 4.75 mm

• (b) >4.75 mm

• (c) <4.75 mm

• (d)12mm

7.Crushed stone, gravel and ordinary sand are examples of ___________

• (a) Lightweight aggregate

• (b) Normal-weight aggregate

• (c) Heavy-weight aggregate

• (d)Both Normal-weight aggregate and Heavy-weight aggregate

8.According to IS : 383 - 1970, a good a aggregate for concrete construction should be

• A. chemically inert

• B. sufficiently strong

• C. sufficiently hard and durable

• D. all of these

9.The deleterious materials present in the aggregate

• A. prevent normal hydration of cement

• B. reduce the strength and durability of concrete

• C. modify the setting action and cause efflorescence

• D. all of these

10.--------is a natural and coarse type of sand which is extracted by digging 2-3m underneath the ground

• A. river sand

• B. digged sand

• C. pit sand

• D. none of these