Concrete Technology MCQs

Question 1

The centre needle ofthe attchment of the Vicat plunger projects the circular cutting edge by

Accepted Answer

0 5 mm

Answer

02 mm

Answer

1 mm

Answer

5 mm

Question 2

The Le Chatlier test is done for cement to ascertain:

Accepted Answer

soundness

Answer

initial setting time

Answer

final setting time

Answer

normal consistency

Question 3

Using the largest maximum size of aggregate in concrete reduces:

Accepted Answer

all the above

Answer

the cement content

Answer

water requirement

Answer

drying shrinkage

Question 4

The maximum size of aggregate in concrete depends upon:

Accepted Answer

all the above

Answer

thickness of the structural section

Answer

spacing of reinforcement

Answer

clear cover

Question 5

Pick up the correct statement from the following

Accepted Answer

The aggregate whose size is greater than 4 75 mm is caleed coarse aggregate

Answer

The aggregate whose size is 4 75 mm is called coarse aggregate

Answer

The aggregate whose size is lesser than 475 mm is called fine aggregate

Answer

None of the above

Question 6

The strength of concrete made with angular aggregate and rounded aggregate is practically same atthe water/cement ratio of

Accepted Answer

65

Answer

4

Answer

48

Answer

55

Question 7

Pick up the correct statement from the following:

Accepted Answer

All the above

Answer

The percentage of voids in the aggregate after proper compaction, is calledthe angularity number

Answer

Angular aggregate are superior to rounded aggregate

Answer

The surface texture depends upon the hardness, grain size, free structure and the structure of the rock

Question 8

For concreting the surface ofthe runways, roads and pavements, the aggregate impact value shall not exceedby weight

Accepted Answer

30%

Answer

20%

Answer

25%

Answer

45%

Question 9

Which one of the following tests, is used to test aggregate fonts abrasion resistance

Accepted Answer

Deval attrition test

Answer

Dorry abrasion test

Answer

Los Angeles test

Answer

All of these