Top 250+ Solved Concrete Technology MCQ Questions Answer
Q. For concreting tunnel linings, transportation of concrete is done by
a. pans
b. wheel borrows
c. containers
d. pumps
Q. Admixture which cause early setting and hardening of concrete are called …
a. Workability admixtures
b. accelerators
c. retarders
d. air entraining agents
Q. As compared to ordinary Portland cement, high alumina cement has
a. higher initial setting time but lower final setting time
b. lower initial setting time but higher final setting time
c. none
d. all
Q. Reduction in the quantity of mixing water which is possible by the use of plasticizers andadmixture varies from
a. 1% to 5%
b. 5% to 15%
c. 15% to 25%
d. 25% to 35%
Q. Which of the following types of concrete mixture is most commonly used in precast concretefactories?
a. truck mounted mixture
b. pan type mixer
c. dual drum mixture
d. tilting drum mixture
Q. According to IS : 456-1978 minimum period stipulated for most curing of concrete using ordinary Portland cement is
a. 3 days
b. 7 days
c. 14 days
d. 28 days
Q. For reinforced concrete exposed to sulphate attack minimum grade required is
a. M10
b. M15
c. M20
d. M25
Q. The deterioration of concrete take place due to.
a. Salt solution
b. Alkalies
c. Fertilizers
d. All of the above
Q. Cement content should be such that concrete has sufficient alkalinity (PH value).
a. True
b. False
c. none
d. all
Q. For sea water concreting …………. cement shall be used.
a. Portland slag cement
b. Portland pozzolana slag cement
c. Super sulphated cement
d. All of above
Q. Durability of concrete can be improved by impregnation of …………… in the voids of concrete.
a. polymer
b. cement
c. Lime
d. Soda
Q. What do you mean by admixtures?
a. Ingredients which are added to in cement before or after concrete mix
b. Ingredients which are added to make aggregates healthier
c. Ingredients added in cement to make it shinier
d. Ingredients added in concrete to make good workability