Q.1
The effect of adding calcium chloride in concrete isi) to increase shrinkageii) to decrease shrinkageiii) to increase setting timeiv) to decrease setting timeThe correct answer is
  • (i) and (iii)
  • (i)and(iv)
  • (ii) and (iii)
  • (ii) and (iv)
Q.2
Bulking of sand is maximum if moisture content is about
  • 2 %
  • 4 %
  • 6 %
  • 10 %
Q.3
The percentage of voids in cement is approximately
  • 25%
  • 40%
  • 60%
  • 80%
Q.4
If the depth of actual neutral axis in a beam is more than the depth of critical neutral axis, then the beam is called
  • balanced beam
  • under-reinforced beam
  • over-reinforced beam
  • none of the above
Q.5
According to IS: 456-the column or the strut is the member whose effective length is greater than
  • The least lateral dimension
  • 2 times the least lateral dimension
  • 3 times the least lateral dimension
  • 4 times the least lateral dimension
Q.6
The relation between modulus of rupture fcr, splitting strength fcs and direct tensile strength fcl is given by
  • tcr – rcs = tct
  • fcr>fcs>fc.
  • fcr
  • fc5>fcr>fC
Q.7
For a cantilever of effective depth of 0.5m, the maximum span to satisfy vertical deflection limit is
  • 3.5 m
  • 4 m
  • 4.5 m
  • 5 m
Q.8
The purpose of reinforcement in pre-stressed concrete is
  • To provide adequate bond stress
  • To resist tensile stresses
  • To impart initial compressive stress in concrete
  • All of the above
Q.9
Minimum grade of concrete to be used in reinforced concrete as per IS:456-is
  • M15
  • M20
  • M10
  • M25
Q.10
In T-shaped R C. retaining walls, the main reinforcement in the stem is provided on
  • the front face in one direction
  • the front face in both directions
  • the inner face in one direction
  • the inner face in both directions
Q.11
According to ISI recommendations, the maximum depth of stress block for balanced section of a beam of effective depth d is
  • 0.43 d
  • 0.55 d
  • 0.68 d
  • 0.85 d
Q.12
Which of the following R.C. retaining walls is suitable for heights beyond 6m?
  • L-shaped wall
  • T-shaped wall
  • counterfort type
  • all of the above
Q.13
Which of the following has high tensile strength ?
  • plain hot rolled wires
  • cold drawn wires
  • heat treated rolled wires
  • all have same tensile strength
Q.14
In a counterfort retaining wall, the main reinforcement is provided on thei) bottom face in front counterfortii) inclined face in front counterfortiii) bottom face in back counterfortiv) inclined face in back counterEortThe correct answer is
  • (i) and (ii),
  • (ii) and (iii)
  • (i) and (iv)
  • (iii) and (iv)
Q.15
In order to obtain the best workability of concrete, the preferred shape of aggregate is
  • rounded
  • elongated
  • angular
  • all of the above
Q.16
Modulus of rupture of concrete is a measure of
  • flexural tensile strength
  • direct tensile strength
  • compressive strength
  • split tensile strength
Q.17
Normally prestressing wires are arranged in the
  • upper part of the beam
  • lower part of the beam
  • center
  • anywhere
Q.18
A higher modular ratio shows
  • higher compressive strength of con-crete
  • lower compressive strength of concrete
  • higher tensile strength of steel
  • lower tensile strength of steel
Q.19
To minimize the effect of differential settlement, the area of a footing should be designed for
  • Dead load only
  • Dead load + live load
  • Dead load + fraction of live load
  • Live load + fraction of dead load
Q.20
The load carrying capacity of a helically reinforced column as compared to that of a tied column is about
  • 5% less
  • 10% less
  • 5% more
  • 10% more
0 h : 0 m : 1 s