Top 350+ Solved Concrete Technology and Design MCQ Questions Answer
Q. To prevent segregation, the maximum height for placing concrete, is
a. 100 cm
b. 125 cm
c. 150 cm
d. 200 cm
Q. For a simply supported beam of span 15 m, the minimum effective depth to satisfy the verticaldeflection limits should be
a. 600 mm
b. 750 mm
c. 900 mm
d. more than 1 m
Q. For compacting plain concrete road surface of thickness less than 20 cm, we use
a. internal vibrator
b. screed vibrator
c. form vibrator
d. none of these
Q. Expansion joints are provided if the length of concrete structures exceeds
a. 10 m
b. 15 m
c. 15 m
d. 45 m
Q. The permissible diagonal tensile stress in reinforced brick work is
a. about 0.1 n/mm²
b. zero
c. 0.3 n/mm² to 0.7 n/mm²
d. about 1.0 n/mm²
Q. Separation of water or water sand cement from a freshly concrete, is known
a. bleeding
b. creeping
c. segregation
d. flooding
Q. The critical section for finding maximum bending moment for footing under masonry wall islocated
a. at the middle of the wall
b. at the edge of the wall
c. halfway between the middle and edge of the wall
d. at a distance equal to effective depth of footing from the edge of the wall
Q. On a grading curve, the gap grading is represented by
a. a horizontal line
b. a vertical line
c. n.w. inclined line
d. n.e. inclined line
Q. High temperature
a. increases the strength of concrete
b. decreases the strength of concrete
c. has no effect on the strength of concrete
d. none of these
Q. Horizontal construction joints in concrete walls are generally provided at
a. soffit level
b. window sill level
c. floor level
d. all the above
Q. Stress strain curve of high tensile steel
a. has a definite yield point
b. does not show definite yield point but yield point is defined by 0.1% proof stress
c. does not show definite yield point but yield point is defined by 0.2% proof stress
d. does not show definite yield point but yield point is defined by 2% proof stress,
Q. Addition of pozzolana to cement causes
a. reduction in permeability
b. loss of heat of hydration
c. reduction in bleeding
d. all the above
Q. Permissible compressive strength of M 200 concrete grade is
a. 100 kg/cm2
b. 150 kg/cm2
c. 200 kg/cm2
d. 250 kg/cm2
Q. The high strength of rapid hardening cement at early stage, is due to its
a. finer grinding
b. burning at high temperature
c. increased lime cement
d. higher content of tricalcium