Top 350+ Solved Concrete Technology and Design MCQ Questions Answer
Q. Log Angles machine is used to test the aggregate for
a. crushing strength
b. impact value
c. abrasion resistance
d. water absorption
Q. The property of the ingredients to separate from each other while placing the concrete is called
a. segregation
b. compaction
c. shrinkage
d. bulking
Q. Pick up the correct statement from the following:
a. higher workability indicates unexpected increase in the moisture content
b. higher workability indicates deficiency of sand
c. if the concrete mix is dry, the slump is zero
d. all the above
Q. The process of mixing, transporting, placing and compacting concrete using Ordinary Port landCement should not take more than
a. 30 minutes
b. 40 minutes
c. 60 minutes
d. 90 minutes
Q. The strength of concrete after one year as compared to 28 days strength is about
a. 10 to 15% more
b. 15 to 20% more
c. 20 to 25% more
d. 25 to 50% more
Q. Specified compressive strength of concrete is obtained from cube tests at the end of
a. 3 days
b. 7 days
c. 21 days
d. 28 days
Q. Pick up the incorrect statement from the following:
a. tricalcium silicate (c3s) hydrates rapidly
b. tricalcium silicate (c3s) generates more heat of hydration
c. tricalcium silicate (c3s) develops early strength
d. tricalcium silicate (c3s) has more resistance to sulphate attack
Q. If the permissible stress in steel in tension is 140 N/mm², then the depth of neutral axis for a singlyreinforced rectangular balanced section will be
a. 0.35 d
b. 0.40 d
c. 0.45 d
d. dependent on grade of concrete also
Q. A construction joint is provided where
a. bending moment is small
b. shear force is small
c. the member is supported by other member
d. all the above
Q. Sand generally contains salt if it is obtained from:
a. nala beds
b. river beds
c. sea beds
d. none of these
Q. According to IS: 4561978, minimum slenderness ratio for a short column is
a. less than 12
b. less than 18
c. between 18 and 24
d. more than 24
Q. Water cement ratio is
a. volume of water to that of cement
b. weight of water to that of cement
c. weight of concrete to that of water
d. both (a) and (b) of the above
Q. For a concrete mix 1:3:6 and water cement ratio 0.6 both by weight, the quantity of waterrequired per bag, is
a. 10 kg
b. 12 kg
c. 14 kg
d. 16 kg
Q. Pick up the incorrect statement from the following:
a. in properly graded aggregates, bulk density is more
b. in single size aggregates, bulk density is least
c. in single size aggregates, bulk density is maximum
d. none of these