Top 350+ Solved Concrete Technology and Design MCQ Questions Answer
Q. The strength and quality of concrete, depend upon:
a. grading of aggregates
b. surface area of aggregates
c. shape of aggregates
d. all the above
Q. The factor of safety for
a. steel and concrete are same
b. steel is lower than that for concrete
c. steel is higher than that for concrete
d. none of the above
Q. The preliminary test is repeated if the difference of compressive strength of three test specimens,exceeds
a. 5 kg/cm2
b. 8 kg/cm2
c. 10 kg/cm2
d. 15 kg/cm2
Q. Setting time of cement increases by adding
a. gypsum
b. hydrogen peroxide
c. calcium chloride
d. sodium oxide
Q. According to the recommendations of IS : 456-1978, the expansion joints
a. are provided where plane changes abruptly
b. are provided to ensure minimum resistance
c. do not carry reinforcement across them
d. all the above
Q. The impurity of mixing water which affects the setting time and strength of concrete, is
a. sodium sulphates
b. sodium chlorides
c. sodium carbonates and bicarbonates
d. calcium bicarbonates
Q. If the size of panel in a flat slab is 6 m × 6 m, then as per Indian Standard Code, the widths ofcolumn strip and middle strip are
a. 3.0 m and 1.5 m
b. 1.5 m and 3.0 m
c. 3.0 m and 3.0 m
d. 1.5 m and 1.5 m
Q. Pick up the incorrect statement from the following:
a. the bottom and top ends of slump mould are parallel to each other
b. the axis of the mould is perpendicular to the end faces
c. the internal surface of the mould is kept clean and free from set cement
d. the mould is in the form of a frustum of hexagonal pyramid
Q. The concrete mix which causes difficulty in obtaining a smooth finish, possess
a. segregation
b. internal friction
c. hardness
d. bleeding
Q. While designing the pile as a column, the end conditions are nearly
a. both ends hinged
b. both ends fixed
c. one end fixed and other end hinged
d. one end fixed and other end free
Q. The internal dimensions of a ware house are 15 m × 5.6 m, and the maximum height of piles is2.70 m, the maximum number of bags to be stored in two piles, are
a. 1500 bags
b. 2000 bags
c. 2500 bags
d. 3000 bags
Q. Pick up the incorrect statement from the following. While performing preliminary test on concrete
a. proportions of the material and water should be the same as to be used at the work site
b. cement should be mixed by hand in order to maintain uniformity
c. concrete mix should be stored in air-tight containers
d. concrete ingredients should be kept at a temperature of 37° ± 2°c
Q. In a spherical dome the hoop stress due to a concentrated load at crown is
a. compressive everywhere
b. tensile everywhere
c. partly compressive and partly tensile
d. zero
Q. I.S. Sieve Nos. 10 mm and 4.75 mm are generally used for grading of
a. coarse aggregates
b. fine aggregates
c. neither (a) nor (b)
d. both (a) and (b)