Top 250+ Solved Concrete Technology MCQ Questions Answer
Q. The presence of tricalcium silicate in cement
a. hydrates the cement rapidly
b. generates less heat of hydration
c. offers high resistance to sulphate attack
d. all of these
Q. If sea water is used for preparing concrete mix, it
a. reduces strength
b. corrodes steel reinforcement
c. causes efflorescence
d. all of these
Q. Which of the following statement is correct?
a. The high early strength is obtained by adding tricalcium silicate in cement.
b. The dicalcium silicate provides good ultimate strength to cement.
c. The tetra calcium alumino ferrite has poor cementing value.
d. all of the above
Q. The concrete can be lifted by pumps through a maximum vertical distance of
a. 10 m
b. 20 m
c. 30 m
d. 50 m
Q. For concreting of tunnel lining, the concrete is transported by
a. pumps
b. pans
c. wheel barrows
d. containers
Q. For the improvement of workability of concrete, the shape of aggregate recommended is
a. irregular
b. angular
c. round
d. flaky
Q. Which of the following statement is correct?
a. Larger the size of coarse aggregate, lesser is the quantity of fine aggregate and of cement required.
b. If very dry aggregates are used, the workability of the mix is likely to be reduced
c. Bulking is caused due to the formation of thin film of surface moisture around the sand particles.
d. all of the above
Q. For a structure subjected to the action of sea water, the cement used is
a. rapid hardening cement
b. low heat cement
c. high alumina cement
d. sulphate resisting cement
Q. For high degree of workability, the slump value should vary between
a. 0 to 25 mm
b. 25 to 50 mm
c. 50 to 80 mm
d. 80 to 100 mm
Q. The term 'ware-hourse pack' means
a. the total capacity of ware-house
b. packing of ware-house
c. pressure compaction of bags on lower layers
d. pressure exertion of bags on upper layers
Q. The length of Vicat plunger in Vicat's apparatus varies from
a. 20 to 30 mm
b. 30 to 40 mm
c. 40 to 50 mm
d. 50 to 60 mm
Q. The cement concrete prepared by mixing aluminium in it, is called
a. air-entrained concrete
b. cellular concrete
c. aerated concrete
d. any one of the above