Top 250+ Solved Concrete Technology MCQ Questions Answer
Q. The main object of compaction of concrete, is:
a. to eliminate air holes
b. to achieve maximum density
c. to provide initimate contact between the concrete and embedded materials
d. all the above.
Q. Which of the following statement is correct?
a. The maximum size of coarse aggregate should not exceed one-fourth of the minimum dimension of the plain concrete member.
b. the maximum size of coarse aggregate should not exceed one-fifth of the minimum dimension of the reinforced concrete member
c. The aggregates of 40 mm, 20 mm and 10 mm sizes are commonly used for concrete works.
d. all of the above
Q. For highly loaded columns, the concrete mix used is of proportion
a. 1 ; 1 : 2
b. 1 ; 1.5 : 3
c. 1 ; 2 : 4
d. 1 ; 3 : 6
Q. Harshness in concrete is due to the excess of
a. water
b. finer particles
c. middle sized particle
d. coarser particles
Q. Bulking of sand is
a. compacting of sand
b. segregating sand of particular size
c. increase in volume of sand due to presence of moisture upto certain extent
d. none of the above
Q. If the fineness modulus of sand is 3, then the sand is graded as
a. very fine sand
b. fine sand
c. medium sand
d. coarse sand
Q. More water should not be added in the concrete mix, as to increase
a. strength
b. durability
c. water-cement ratio
d. all of these
Q. The concrete mix is said to be workable if it has
a. compatibility
b. movability
c. stability
d. all of these
Q. The workability of concrete mix increases with the increase in moisture content.
a. Agree
b. Disagree
Q. According to IS : 269 - 1976, the requirement of an ordinary Portland cement is that
a. the residue does not exceed 10% when sieved through IS sieve No. 9
b. its expansion is not more than 10 mm for unaerated cement
c. its initial setting time is not less than 30 minutes
d. all of the above