Top 350+ Solved Concrete Technology and Design MCQ Questions Answer
Q. To obtain cement dry powder, lime stones and shales or their slurry, is burnt in a rotary kiln at atemperature between
a. 1100° and 1200°c
b. 1200° and 1300°c
c. 1300° and 1400°c
d. 1400° and 1500°c
Q. In a pile of length , the points of suspension from ends for lifting it are located at
a. 0.207 l
b. 0.25 l
c. 0.293 l
d. 0.333 l
Q. Curing a concrete for long period ensures better
a. volume stability
b. strength
c. water resistance
d. all the above
Q. Batching error means inaccuracy in the quantity of
a. aggregates
b. cement
c. water
d. all the above
Q. If X, Y and Z are the fineness modulli of coarse, fine and combined aggregates, the percentage (P)of fine aggregates to combined aggregates, is
a. p = [(z - x)/(z - y)] × 100
b. p = [(x - z)/(z - y)] × 100
c. p = [(x - z)/(z + y)] × 100
d. p = [(z + x)/(z - y)] × 100
Q. If the depth of actual neutral axis in a beam is more than the depth of critical neutral axis, then thebeam is called
a. balanced beam
b. under-reinforced beam
c. over-reinforced beam
d. none of the above
Q. Proper proportioning of concrete, ensures
a. desired strength and workability
b. desired durability
c. water tightness of the structure
d. all the above
Q. The relation between modulus of rupture fcr, splitting strength fcs and direct tensile strength fcl isgiven by
a. fcr - fcs = fcl
b. fcr > fcs > fcl
c. fcr < fcs < fcl
d. fcs > fcr > fcl
Q. Air entrainment in the concrete increases
a. workability
b. strength
c. the effects of temperature variations
d. the unit weight
Q. Construction joints are provided
a. where b.m. and s.f. are small
b. where the member is supported by other member
c. at 18 m apart in huge structures
d. all the above
Q. Maximum distance between expansion joints in structures as per IS: 456 1978 is
a. 20 m
b. 30 m
c. 45 m
d. 60 m
Q. In a spherical dome subjected to concentrated load at crown or uniformly distributed load, themeridional force is always
a. zero
b. tensile
c. compressive
d. tensile or compressive
Q. An aggregate is said to be flaky, if its least dimension is less than
a. 2/3 mean dimension
b. 3/4 mean dimension
c. 3/5 mean dimension
d. 5/8 mean dimension