Top 350+ Solved Concrete Technology and Design MCQ Questions Answer
Q. While designing an air entrained concrete
a. water cement ratio is reduced
b. proportion of aggregates is reduced
c. an allowance for the entrained air is made
d. all the above
Q. M 150 grade of concrete approximates
a. 1 : 3 : 6 mix
b. 1 : 1 :2 mix
c. 1 : 2 : 4 mix
d. 1 : 1.5 : 3 mix
Q. Permissible compressive strength of M 300 concrete grade is
a. 100 kg/cm2
b. 150 kg/cm2
c. 200 kg/cm2
d. 300 kg/cm2
Q. Strength of concrete increases with
a. increase in water-cement ratio
b. increase in fineness of cement
c. decrease in curing time
d. decrease in size of aggregate
Q. For ensuring quality of concrete, use
a. single sized aggregates
b. two sized aggregate
c. graded aggregates
d. coarse aggregates
Q. In working stress design, permissible bond stress in the case of deformed bars is more than that inplain bars by
a. 10 %
b. 20 %
c. 30 %
d. 40 %
Q. Workability improved by adding
a. air-entraining agent
b. foaming agent
c. oily-agent
d. all the above
Q. A T-shaped retaining wall mainly consists of
a. one cantilever
b. two cantilevers
c. three cantilevers
d. four cantilevers
Q. Pick up the correct statement from the following:
a. insufficient quantity of water makes the concrete mix harsh
b. insufficient quantity of water makes the concrete unworkable
c. excess quantity of water makes the concrete segregated
d. all the above
Q. The fineness modulus of fine aggregate is in the range of
a. 2.0 to 3.5
b. 3.5 to 5.0
c. 5.0 to 7.0
d. 6.0 to 8.5
Q. After casting, an ordinary cement concrete on drying
a. expands
b. mix
c. shrinks
d. none of these
Q. The most commonly used admixture which prolongs the setting and hardening time is
a. gypsum
b. calcium chloride
c. sodium silicate
d. all of the above
Q. For given water content, workability decreases if the concrete aggregates contain an excess of
a. thin particles
b. flat particles
c. elongated particles
d. all the above