Top 350+ Solved Concrete Technology and Design MCQ Questions Answer
Q. Pick up the incorrect statement from the following:
a. space between the exterior walls of a warehouse and bag piles should be 30 cm
b. cement bags should preferably be piled on wooden planks
c. width and height of the pile should not exceed 3 m and 2.70 m respectively
d. none of these
Q. For a slab supported on its four edges with corners held down and loaded uniformly, the Marcuscorrection factor to the moments obtained by Grashoff Rankine's theory
a. is always less than 1
b. is always greater than 1
c. can be more than 1
d. can be less than 1
Q. Addition of pozzolana to ordinary port land cement, causes
a. decrease in early strength
b. reduction in chemical action with sulphates
c. increase in shrinkage
d. all the above
Q. For construction of structures in sea water, the cement generally preferred to, is
a. portland-pozzolana cement
b. quick setting cement
c. low heat portland cement
d. rapid hardening cement
Q. Curing of pavements, floors, roofs and slabs, is done by
a. membrane method
b. ponding method
c. covering surface with bags
d. sprinkling water method
Q. In symmetrically reinforced sections, shrinkage stresses in concrete and steel are respectively
a. compressive and tensile
b. tensile and compressive
c. both compressive
d. both tensile
Q. The main object of compaction of concrete, is:
a. to eliminate air holes
b. to achieve maximum density
c. to provide intimate contact between the concrete and embedded materials
d. all the above
Q. Modulus of elasticity of steel as per IS: 4561978 shall be taken as
a. 20 kn/cm²
b. 200 kn/cm²
c. 200 kn/mm²
d. 2 × 106 n/cm²
Q. The grade of concrete M 150 means that compressive strength of a 15 cm cube after 28 days, is
a. 100 kg/cm2
b. 150 kg/cm2
c. 200 kg/cm2
d. 250 kg/cm2
Q. In reinforced concrete footing on soil, the minimum thickness at edge should not be less than
a. 100 mm
b. 150 mm
c. 200 mm
d. 250 mm
Q. For preparing a test-specimen, it is necessary
a. to mix cement and fine aggregate by dry hand
b. to mix coarse aggregates
c. to mix water to the cement, fine aggregates and coarse aggregates
d. all the above
Q. For a good concrete
a. aggregates should be hard and durable
b. water should be free from organic materials
c. cement should be sufficient to produce the required strength
d. all the above
Q. The process of hardening the concrete by keeping its surface moist is known
a. placing
b. wetting
c. curing
d. compacting