Top 350+ Solved Concrete Technology and Design MCQ Questions Answer
Q. Pick up the correct proportions of chemical ingredients of cement
a. lime : silica : alumina : iron oxide : 63 : 22 : 6 : 3
b. silica : lime : alumina : iron oxide : 63 : 22 : 6 : 3
c. alumina : silica : lime : iron oxide : 63 : 22 : 6 : 3
d. iron oxide : alumina : silica : lime : 63 : 22 : 6 : 3
Q. Internal friction between the ingredients of concrete, is decreased by using
a. less water
b. fine aggregates
c. rich mix
d. more water and coarse aggregates
Q. Pick up the correct statement from the following:
a. lime in excess, causes the cement to expand and disintegrate
b. silica in excess, causes the cement to set slowly
c. alumina in excess, reduces the strength of the cement
d. all the above
Q. If the effective plan area of a warehouse is 54 sq. m, and maximum height of piles permitted is 270cm, the number of cement bags to be stored, is
a. 2000 bags
b. 2200 bags
c. 2400 bags
d. 2700 bags
Q. The property of fresh concrete, in which the water in the mix tends to rise to the surface whileplacing and compacting, is called
a. segregation
b. bleeding
c. bulking
d. creep
Q. Workability of concrete for a given water content is good if the aggregates, are
a. rounded aggregate
b. irregular aggregate
c. angular aggregate
d. flaky aggregates
Q. For preparing ordinary concrete, the quantity of water used, is
a. 5% by weight of aggregates plus 20% of weight of cement
b. 10% by weight of aggregates plus 10% of weight of cement
c. 5% by weight of aggregates plus 30% of weight of cement
d. 30% by weight of aggregates plus 10% of weight of cement
Q. Finer grinding of cement
a. affects only the early development of strength
b. affects only the ultimate strength
c. both (a) and (b)
d. does not affect the strength
Q. The light weight aggregates are obtained from
a. sedimentary rocks
b. metamorphic rocks
c. igneous rocks
d. volcanic source
Q. The aggregate impact value of the aggregate used in
a. building concrete is less than 45
b. road pavement concrete is less than 30
c. runway concrete is less than 30
d. all the above
Q. For walls, columns and vertical faces of all structural members, the form work is generallyremoved after
a. 24 to 48 hours
b. 3 days
c. 7 days
d. 14 days
Q. Efflorescence in cement is caused due to an excess of
a. alumina
b. iron oxide
c. silica
d. alkalis
Q. For given workability the grading requiring the least amount of water is one that gives
a. greatest surface area for the given cement and aggregates
b. least surface area for the given cement and aggregates
c. least weight for the given cement and aggregates
d. greatest weight for the given cement and aggregates
Q. Minimum pitch of transverse reinforcement in a column is
a. the least lateral dimension of the member
b. sixteen times the smallest diameter of longitudinal reinforcement bar to be tied
c. forty-eight times the diameter of transverse reinforcement
d. lesser of the above three values
Q. Pick up the incorrect statement applicable to the field test of good cement.
a. when one thrusts one\s hand into a bag of cement, one should feel warm
b. the colour of the cement is bluish
c. by rubbing cement in between fingers, one should feed rough
d. all the above