Concrete Technology MCQs

Question 1

The preliminary test is repeated if the difference of compressive strength of three test specimens, exceeds

Accepted Answer

15 kg/cm2

Answer

5 kg/cm2

Answer

8 kg/cm2

Answer

10 kg/cm2

Question 2

For the construction of RCC slabs, columns, beams, walls, etc the grade of concrete mix used, is

Accepted Answer

1 :2 :4

Answer

1 :3 :6

Answer

1 : I: 3

Answer

1 : 1 :2

Question 3

For the construction of the retaining structures, the type of concrete mix to be used, is

Accepted Answer

1: 1: 3

Answer

1: 3 : 6

Answer

1 : 2 : 4

Answer

1 : 1 : 2

Question 4

The correct proportion of ingredients of concrete, depends upon

Accepted Answer

All the above

Answer

bulking of sand

Answer

water content

Answer

absorption

Question 5

If the deptl-eof moist sand in a cylinder is 15 cr the depth of the sand when fully inundated with watel cm, the bulking of the moist sand, is

Accepted Answer

25%

Answer

10%

Answer

12%

Answer

15%

Question 6

Pick up the correct statement from the following :

Accepted Answer

All the above

Answer

The quality Pc water governs the strength of concrete

Answer

The quantity of water required for concreting, depends upon the grading of aggregate amd method of compaction

Answer

10% excess of water reduces the strength of concrete by 15%

Question 7

Ordinary concrete is not used for concrete grade

Accepted Answer

M 400

Answer

M 100

Answer

M 150

Answer

M 200

Question 8

For preparing ordinary concrete, the quantity of water used, is

Accepted Answer

5% by weight of aggregates plus 30% of weight of cement

Answer

5% by weight of aggregates plus 20% of weight of cement

Answer

10% by weight of aggregates plus 10% of weight of cement

Answer

30% by weight of aggregates plus 10% of weight of cement

Question 9

The following proportion of the ingredients of concrete mix, is not in conformation to arbitrary method of proportioning

Accepted Answer

1 : 4 : 10

Answer

1 : 1 : 2

Answer

1 : 2 : 4

Answer

1 : 3 : 6