PARISUTHAM INSTITUTE OF TECHNOLOGY AND SCIENCE
Department of Civil Engineering
III Year V Semester
CE2403 DESIGN OF RC AND BRICK MASONRY STRUCTURES
QUIZ-1
1. M10 grade of concrete approximates
a. 1:3:6
b. 1:1:2
c. 1:2:4
d. 1:1.5:3
2. M25 grade of concrete approximates
a. 1:3:6
b. 1:1:2
c. 1:2:4
d. 1:1.5:3
3. . In a pre-stressed member, it is advisable to use:
a. Low- strength concrete
b. High- strength concrete
c. High strength concrete and low tension steel
d. High strength concrete and high tension steel
4. Deflection can be controlled by using appropriate
a. Aspect ratio
b. Modular ratio
c. span/depth ratio
d. water/cement ratio
5. The maximum diameter of the reinforcement bars in RCC beams is limited to
a. 28mm
b. 40mm
c. One-eighth of the least dimension of the beams
d. One-tenth of the depth of beams.
6. The effective width of flange in RCC T-beam should be restricted to
a. Lo/6+bw+6df
b. Lo/12+bw+3df
c. Lo/3
d. c/c distance of the beams
7. the tension reinforcement in a RCC beam can be cut off at a point when it is no longer needed if
a. enough bond length is available
b. the shear at the cutoff point does not exceed two third
c. bending moment is zero
d. all the above
8. the maximum horizontal distance between parallel main reinforcement bars in solid slabs is
a. 5times the effective depth or 450mm whichever is smaller
b. 3times the effective depth or 450mm whichever is smaller
c. 200mmtimes the effective depth or 450mm whichever is smaller
d. 7times the effective depth or 450mm whichever is smaller
9. The minimum cover to the main reinforcement in RCC beam must be
a. 15mm or diameter of the bar
b. 25mm or diameter of the bar
c. 40mm or diameter of the bar
d. 25mm or size of course aggregate
10. The minimum cover to the main reinforcement in RCC slab must be
a. 15mm or diameter of the bar
b. 25mm or diameter of the bar
c. 40mm or diameter of the bar
d. 25mm or size of course aggregate
11. Working stress design assumes
a. Elastic stress strain relation
b. Linear stress strain relation
c. Elastic and linear stress strain relation
d. Isotropic material
12. The stress caused by different loads can be superimposed in
a. Working stress design
b. Ultimate strength design
c. Limit state design
d. Plastic design
13. In the limit state method partial factor of safety for concrete is taken as
a. 3
b. 2
c. 1.15
d. 1.5
14. In the limit state method partial factor of safety for steel is taken as
a. 3
b. 2
c. 1.15
d. 1.5
15. A partition wall is designed to carry
a. Live load
b. Imposed load
c. Vertical loads
d. No external loads
16. A shear wall is designed to carry
a. Axial shear and bending forces
b. Shear force
c. Shear and bending
d. Axial and bending
17. The maximum strain in the tension reinforcement in the section
a. 1.15Es/Fy+0.002
b. Fy/1.15Es+0.002
c. 1.15ES/Fy
d. None of the above
18. In the limit state method the over reinforced section
a. Are not permitted
b. Are permitted
c. Are permitted only in extreme cases
d. None of the above
19. The distance to the neutral axis from the top compression fiber of a singly reinforced
rectangular section is given by
a. Xu=0.36fckb/0.87fyAst
b. Xu=0.36fyAst/0.87fckast
c. Xu=0.36FYb/0.87fckast
d. Xu=0.87fyast /0.36fckb
20. In a reinforced concrete section, the shape of the nominal shear stress diagram is
a. Parabolic over the full depth
b. Parabolic above neutral axis and rectangular below
c. Rectangular over the full depth
d. Rectangular above neutral axis and parabolic below
21. which of the following test gives the workability of concrete
a. compression test
b. bending test
c. slump test
d. none of the above
22. Which component of concrete is responsible for the strength of the concrete
a. Magnesium oxide
b. Silica
c. Alumina
d. Calcium sulphate
23. The entrained air in concrete
a. increase workability
b. decrease workability
c. increase strength
d. none of these
24. The approximate value of the ratio between direct tensile and flexural strength is
a. 0.33
b. 0.5
c. 0.75
d. 1.0
25. The factor of safety for
a. Steel and concrete are same
b. Steel is lower than that for concrete
c. Steel is higher than that for concrete
d. None of the above
26. If a beam fails in bond, then its bond strength can be increased most economically by
a. Increasing the depth of beam
b. Using thinner bars but more in number
c. Using thicker bars but less in number
d. Providing vertical stirrups
27. The plies in plywood are so placed that the grain of each ply are:
a. Parallel to each other
b. At right angle to each other
c. 45° oblique to adjacent grain
d. Not constrained by any consideration
28. Modulus of elasticity of steel as per IS code shall be taken as
a. 20kN/cm2
b. 200kN/cm2
c. 20kN/mm2
d. 2 x 105N/mm2
29. If the depth of actual neutral axis in a beam is more than the depth of critical neutral axis then
the beam is called
a. Balanced beam
b. Under reinforced beam
c. Over reinforced beam
d. None of the above
30. Which type of cement is recommended in large mass concrete works like dam?
a. Ordinary Portland
b. High alumina
c. Low heat Portland
d. Portland pozzollona
31. The ratio of the diameter of reinforcing bars and slab thickness is
a. ¼
b. 1/5
c. 1/6
d. 1/8
32. The percentage of reinforcement in case of slabs when HYSD are used is not less than
a. 0.15
b. 0.12
c. 0.30
d. 1.00
33. The slab id designed as one way if the ratio of long span to short span is
a. Less than 1
b. Between 1 and 1.5
c. Between 1.5 and 2
d. Greater than 2
34. The main reason for providing number of reinforcing bars at a support in a simply supported
beam is to resist in that zone
a. Compressive stress
b. Shear stress
c. Bond stress
d. Tensile stress
35. When the shear stress exceeds the permissible limit in a slab then it is reduced by
a. Increasing the depth
b. Providing shear reinforcement
c. Using high strength steel
36.
37.
38.
39.
40.
41.
42.
43.
44.
d. Using thinner bars but more in numbers
According to IS code the maximum compressive stress in concrete for design purpose is taken as
a. 0.370fck
b. 0.416fck
c. 0.446fck
d. 0.670fck
The creep strain are
a. Caused due to dead load only
b. Caused due to live load only
c. Caused due to both dead and live load
d. Independent of load
A beam curved in plan is designed for
a. Bending moment and shear
b. Bending moment and torsion
c. Shear and torsion
d. Bending moment, shear and torsion
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 0.2% proof stress
c. Does not show definite yield point but yield point is defined by 0.1% proof stress
d. Does not show definite yield point but yield point is defined by 2% proof stress
The bond strength between steel and concrete is due to
a. Friction
b. Adhesion
c. Both friction and adhesion
d. None of the above
For reinforced concrete exposed to sulphate attack minimum grade required
a. M10
b. M15
c. M20
d. M25
in the limit state design of concrete for flexure the area of stress block is taken as
a. 0.36 fck Xu
b. 0.42 fck Xu
c. 0.446 fck Xu
d. 0.53 fck Xu
In limit state design the limiting value of depth of neutral axis is
a. 0.53d
b. 0.48d
c. 0.45d
d. 0.43d
Design strength of concrete for limit state of collapse is taken as
a. Fck
b. 0.67fck/FOS
c. 0.67fck
d. FOS fck
45. In the LSM design of concrete structure the strain distribution is assumed to be
a. Linear
b. Non linear
c. Parabolic
d. Parabolic and rectangular
46. Mulim of a singly reinforced balanced RC rectangular beam section is
a. 0.115fck bd2
b. 0.138 fck bd2
c. 0.185 fck bd2
d. 0.225 fck bd2
47. For a given grade of steel the limiting reinforcement index for a singly reinforced beam is
proportional to
a. Fck
b. Fy
c. Fy/fck
d. Fck/Fy
48. In case of two slab the limiting deflection of the slab is
a. Primarily a function of the long span
b. Primarily a function of the short span
c. Independent of long or short span
d. Dependent on both long and short spans
49. A doubly reinforced beam is considered less economical than a singly reinforced beam because
a. Tensile steel required is more than that for a balanced section
b. Shear reinforcement is more
c. Concrete is not stressed to its full value
d. Compressive steel is under stressed
50. Torsion resisting capacity of a given RC section
a. Decrease with decrease in stirrups spacing
b. Decreases with increase in longitudinal bars
c. Does not depend upon stirrups and longitudinal steels
d. Increase with the increase in stirrup and longitudinal steels