Concrete Technology MCQs

Question 1

Pick up the correct statement from the following :

Accepted Answer

All the above

Answer

The diameter of the pipe line used for transportation of concrete by pumps does not exceed 30 cm

Answer

The slump of the concrete to be pumped, should not be less that 5 cm and more than 8 cm

Answer

The water cement ratio of concrete to be pumped is kept between 05 to 065

Question 2

To prevent segregation, the maximum height for placing concrete, is

Accepted Answer

100 cm

Answer

125 cm

Answer

150 cm

Answer

200 cm

Question 3

The process of hardening the concrete by keeping its surface moist is known

Accepted Answer

curing

Answer

placing

Answer

wetting

Answer

compacting

Question 4

Curing of pavements, floors, roofs and slabs, is done by

Accepted Answer

ponding method

Answer

membrane method

Answer

covering surface with bags

Answer

sprinkling water method

Question 5

Curing a concrete for long period ensures better

Accepted Answer

all the above

Answer

volume stability

Answer

strength

Answer

water resistance

Question 6

Under normal conditions using an ordinary cement, the period of removal of the form work, is :

Accepted Answer

all the above

Answer

17 days for beam soffits

Answer

14 days for bottom slabs of spans 46 m and more

Answer

21 days for bottom beams over 6 m spans

Question 7

While compacting the concrete by a mechanical vibrator, the slump should not exceed

Accepted Answer

50 cm

Answer

25 cm

Answer

75 cm

Answer

10 cm

Question 8

The maximum thickness of concrete floor of a cement warehouse, is

Accepted Answer

25 cm

Answer

10/cm

Answer

15 cm

Answer

20 cm

Question 9

The shuttering of a hall measuring 4 m x 5 m, can be removed after

Accepted Answer

7 days

Answer

5 days

Answer

10 days

Answer

14 days