# Structural Design Specification Interview Questions

## Structural Design Specifications – Civil Engineering Questions and Answers

1. A continuous beam shall be deemed to be a deep beam if the ratio of its effective span to overall depth, is
A. 2.0
B. 2.5
C. less than 2
D. less than 2.5

2. The gap between web plates and flange plates for fillet welds should not be more than
A. 0.5 mm
B. 0.75 mm
C. 1.0 mm
D. 1.25 mm
E. 1.5 mm

3. If D is the overall thickness of the slab, the diameter of the reinforcing bars should not exceed
A. 1/4 D
B. 1/5 D
C. 1/6 D
D. 1/7 D
E. 1/8 D

4. The area of the concrete in compression plus the area of reinforcement transferred on the basis of modular ratio, is called
A. transferred section
B. equivalent section
C. cracked section
D. none of these.

5. The depth ‘d’ of webs without horizontal stiffeners and consisting of tongue plates is taken lesser than the depth of the girder between the flanges less the sum of the depth of the tongue plates, and
A. eight times the sum of the thickness of tongue plates
B. six times the sum of the thickness of tongue plates
C. four times the sum of the thickness of tongue plates
D. None of the above.

6. For design of a column the eccentricity of loading shall be taken as the distance from the assumed point of application of the load to the centroid of the column, subject to a minimum of
A. 10 mm
B. 20 mm
C. 30 mm
D. 40 mm
E. 50 mm

7. The maximum area of compression reinforcement in a beam of cross section B x D is limited to
A. 0.02 BD
B. 0.03 BD
C. 0.04 BD
D. 0.05 BD

8. Moist curing of the exposed surfaces of concrete is done at least for
A. 3 days
B. 5 days
C. 7 days
D. 14 days

9. Pick up the incorrect statement from the following:
A. The gross section of the web of rolled I-beams is the depth of the beam multiplied by the web thickness
B. The gross section of the web of channels is the depth of the web multiplied by its thickness
C. The gross section of the web of plate girders is the depth of the web plate multiplied by its thinkness
D. None of these.

10. For battened struts, the effective length is increased by
A. 5%
B. 7.5%
C. 10%
D. 12.5%
E. 15%

11. The test strength of the sample is taken as the average of the strength of
A. 2 specimens
B. 3 specimens
C. 4 specimens
D. 5 specimens

12. The maximum deflection of a structure should not normally exceed lesser of the span/350 or
A. 10 mm
B. 15 mm
C. 20 mm
D. 25 mm

13. Pick up the correct statement regarding columns.
A. The cross sectional area of longitudinal reinforcement, should not be less than 0.8% nor more than 4% of its gross sectional area
B. The minimum of longitudinal bars provided in rectangular and circular columns are 4 and 6 respectively
C. In helically reinforced column, the minimum number of longitudinal reinforcement should be six
D. If the effective length of a column is less than three times its lateral dimension, it is generally called a pedestal
E. All the above.

14. For heavily reinforced concrete member, the nominal maximum size of the aggregates should be restricted to
A. 5 mm less than the minimum clear distance between the main bars
B. 5 mm less than the minimum cover to the reinforcement
C. smaller of (a) and (b)
D. greater of (a) and (b)

15. The minimum pitch i.e., the distance between centres of rivet holes is not less than
A. 1.5 times the hole diameter
B. 2.0 times the hole diameter
C. 2.5 times the hole diameter
D. 3.0 times the hole diameter
E. None of these.

16. Dispersion of load through the flange to web is considered as dispersed uniformly at an angle ?° is
A. 10°
B. 15°
C. 20°
D. 25°
E. 30°

17. The outstand of stiffeners should be (where t is the thickness of flat).
A. 6 t
B. 8 t
C. 10 t
D. 12 t

18. The grade of concrete generally not used in the reinforced concrete, is
A. M 10
B. M 15
C. M 20
D. M 40

19. The cover to the main reinforced may be reduced up to one third of the specified cover but not less than
A. 5 mm
B. 7 mm
C. 10 mm
D. 15 mm

20. For the plain reinforcing bars in compression, the permissible design bond stress in tension, is increased by
A. 10%
B. 15%
C. 20%
D. 25%
E. 30%

21. The reduced level of third floor of a building near a column is 205.350 m. The reduced levels of the undersides of four beams supporting the fourth floor framing into the column mutually perpendicular are 208.350 m, 208.450 m, 208.500 m and 208.550 m. The supported length of the column is
A. 3.000 m
B. 3.100 m
C. 3.150 m
D. 3.200 m

22. The maximum compressive strength on 15 cm cubes of M 20 grade concrete at 7 days, should be a minimum of
A. 7 N/mm2
B. 10 N/mm2
C. 15 N/mm2
D. 20 N/mm2

23. The distance between, rivet line and the nearest edge of a joint not exposed to weather, is taken (where t is thickness in mm of the thinner outside plate).
A. 6 t
B. 8 t
C. 10 t
D. 12 t

24. The over all depth of a solid slab is 20 cm and effective depth is 15 cm. The horizontal distance between parallel main reinforcement should not be more than
A. 30 cm
B. 40 cm
C. 45 cm
D. 60 cm

25. Pick up the correct precaution while spilicing the reinforcing bars
A. These are provided away from the sections of maximum stress
B. These are staggered
C. These are provided if the B.M. is more than 50% of M.R.
D. Not more than half the bars are spliced at a section
E. All the above.

26. The ratio of minimum compressive strength on 15 cm cubes prepared with the concrete of M 20 grade and M 40 grade, at 7 days should be at least
A. 1/3
B. 1/2
C. 3/2
D. 2.0

27. The minimum compressive strength on 15 cm cubes of M 30 grade concrete at 7 days, should be a minimum of
A. 7 N/mm2
B. 10 N/mm2
C. 20 N/mm2
D. 30 N/mm2

28. The grade of plain concrete to be used in sea water or structures exposed to sea water, should be
A. M lO
B. M 15
C. M 20
D. M 30

29. In case of continuous beams, the distance between the points of zero moment, may be obtained as (where l is the effective span).
A. 0.5 l
B. 0.6 l
C. 0.7 l
D. 0.8 l

30. The reinforcing bars in beams are not bundled in contact if the diameter of the bars, exceeds
A. 12 mm
B. 20 mm
C. 35 mm
D. 30 mm
E. 36 mm

31. For the reinforced concrete member totally immersed in sea water, the normal cover provided for the reinforcing bars is further increased by
A. 10 mm
B. 20 mm
C. 30 mm
D. 40 mm
E. 50 mm

32. The effective and actual lengths of a cantilever are same if continuous at the support,
A. unstrained against torsion at the support and free at the end
B. with partial restraint against torsion of the support and free at the end
C. restrained against torsion at the support and free at the end
D. none of the these.

33. The slenderness ratio of single angle discontinuous struts conmected by a single rivet or bolt, shall not exceed
A. 110
B. 130
C. 150
D. 180

34. In adverse circumtances, the reinforced concrete member immersed in sea water or subjected to sea spray, the maximum permissible cover for the reinforcing bars, should not exceed
A. 40 mm
B. 50 mm
C. 60 mm
D. 70 mm
E. 75 mm

35. If a column is subjected to dead load and super imposed load only, the maximum ratio 1/r should not be greater than
A. 180
B. 250
C. 350
D. 400

36. If the dimensions of a rectangular section of a short column are 15 cm x 20 cm, its unsupported length should be restricted to
A. 9.0 m
B. 10.0 m
C. 11.0 m
D. 12.0 m

37. The designed transverse shear in lacing is assumed as
A. 2.5% of axial load
B. 3% of axial load
C. 3.5% of axial load
D. 4% of axial load.

38. For the stability of a structural part, the weight or anchorage should be
A. 1.2 times the minimum overturning moment due to dead load
B. 1.4 times the minimum overturning moment due to dead load
C. sum of (a) and (b)
D. none of these.

39. The creep coefficient i.e. the ratio of ultimate creep and elastic strain after
A. 7 days is 2.2
B. 28 days is 1.6
C. 365 days is 1.1
D. all the above.