Structural Design Online Test - Paper 3

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Vikash chaudhary

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Total Questions: 50
Time Allotted: 50 minutes
Passing Score: 70%
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1 / 50

1. The ultimate tensile strength of structural mild steel is about

a) 160 N/mm²

b) 260 N/mm²

c) 520 N/mm²

d) 420 N/mm²

2 / 50

2. The maximum diameter of bars in a beam is limited to

a) 25mm

b) 40mm

c) one-eighth of the least dimension of the beams

d) one-tenth of the depth

3 / 50

3. After casting, an ordinary cement concrete on drying

a) shrinks

b) expands

c) remains unchanged

d) can expand or shrink

4 / 50

4. Minimum spacing between horizontal parallel reinforcements of the same size should not be less than

a) one diameter

b) two diameters

c) three diameters

d) four diameters

5 / 50

5. The advantage of reinforced concrete is due to

a) monolithic character

b) economy because less maintenance cost

c) molding in any desired shape

d) all of the above

6 / 50

6. The types of failure in which stress in concrete and steel reaches its permissible value at a time is called balance failure. At this stage, the location of the neutral axis is

a) above the critical neutral axis

b) matches with the critical neutral axis

c) below the critical neutral axis

d) all of the above

7 / 50

7. A diagonal crack is introduced in a beam due to

a) bending moment (BM)

b) shear force (SF)

c) bending moment & shear force (BM & SF)

d) none of the above

8 / 50

8. The strength and quality of concrete depends on

a) aggregate shape

b) aggregate grading

c) surface area of the aggregate

d) all of the above

9 / 50

9. For a cantilever of effective depth of 50cm, the maximum span to satisfy vertical deflection limit is

a) 3.0m

b) 3.5m

c) 4.0m

d) 4.5m

10 / 50

10. The effective span of a simply supported slab is

a) clear span plus the effective depth of the slab

b) span between outer faces of two walls

c) distance between the center of bearing

d) none of the above

11 / 50

11. According to the steel beam theory of doubly reinforced beams

a) tension is resisted by tension steel

b) compression is resisted by compression steel

c) stress in tension steel equals the stress in compression steel

d) all of the above

12 / 50

12. The designed main bars are placed in a two-way slab

a) along the short span

b) along the long span

c) perpendicular to the length of the slab

d) all of the above

13 / 50

13. In an RCC beam, if the amount of steel increases, the depth of N.A.

a) remains constant

b) decreases

c) increases

d) none of the above

14 / 50

14. Laps in bars are equal to

a) bond length

b) twice bond length

c) 1.5 to twice bond length

d) none of the above

15 / 50

15. A flat slab is supported

a) on beams

b) on columns

c) on beams and columns

d) on columns monolithically built with slab

16 / 50

16. Steel beam theory is used for

a) design of a simple steel beam

b) steel beam encased in concrete

c) a beam if shear exceeds 4 times allowable shear stress

d) doubly reinforced beams ignoring compressive stress in concrete

17 / 50

17. If the effective length of a 32 cm diameter column is 4.40 mts slenderness ratio is

a) 45

b) 50

c) 55

d) 60

18 / 50

18. In a two-way slab, the lifting of corners occurs due to

a) zero moment at the center

b) torsional moments on the slab

c) unbalanced moments on the slab

d) none of the above

19 / 50

19. Shear stress is not taken by

a) horizontal steel

b) vertical steel

c) inclined steel

d) none of the above

20 / 50

20. Distribution reinforcement in a simply supported slab is provided to distribute

a) load

b) temperature stress

c) shrinkage stress

d) all of the above

21 / 50

21. In R.C.C. works, the proportion of the mixture 1:1.5:3, the volume of the cement is in

a) 0.2 m³

b) 0.4 m³

c) 0.5 m³

d) 0.1 m³

22 / 50

22. The amount of reinforcement for main bars in a slab is based upon

a) minimum bending moment

b) maximum bending moment

c) minimum shear stress

d) maximum shear force

23 / 50

23. The maximum reinforcement in a column to consider the practical problem is

a) 4%

b) 5%

c) 6%

d) 8%

24 / 50

24. Main reinforcement in an RCC beam is used for

a) bending moment

b) shear force

c) moment of resistance

d) none of the above

25 / 50

25. A continuous beam shall be deemed to be a deep beam if the ratio of effective span to overall depth is

a) 2

b) 2.5

c) 3

d) 3.5

26 / 50

26. The limits of the percentage of the longitudinal reinforcement in a column are given by

a) 0.8% to 6%

b) 0.8%

c) 1.0% to 4%

d) 1.0% to 6%

27 / 50

27. If the slenderness ratio for a column is 100 then the column is said to be

a) long

b) medium

c) short

d) none of the above

28 / 50

28. The minimum cover at the end of reinforcement should be

a) 20 Φ

b) 25 mm

c) mini. of (a) and (b) above

d) max. of (a) and (b) above

29 / 50

29. The minimum number of main bars in an octagonal column is

a) 4

b) 6

c) 8

d) 12

30 / 50

30. The minimum cover in a slab is neither less than the diameter of the bar nor less than

a) 15 mm

b) 20 mm

c) 25 mm

d) 30 mm

31 / 50

31. In a column, the pitch of the ties shall be

a) least lateral dimension of the column

b) 16 x θ of the smallest longitudinal bar

c) 48 x θ of the transverse reinforcement

d) least of the above

32 / 50

32. The factor of safety for steel as compared to concrete is

a) same

b) lower

c) higher

d) constant

33 / 50

33. The main reason for placing the main bar at the top in the case of a cantilever slab is

a) load at the top

b) tension at the top

c) all of the above

d) compression at the top

34 / 50

34. Surface vibrator is effective only when the thickness of concrete does not exceed

a) 5 cm

b) 70 cm

c) 15 cm

d) 20 cm

35 / 50

35. The maximum spacing of side-face reinforcement in a beam should be

a) 100 mm

b) 200 mm

c) 300 mm

d) 400 mm

36 / 50

36. Singly reinforced beam & doubly reinforced beam are decided based on

a) bending moment

b) shear force

c) bending moment & shear force

d) none of the above

37 / 50

37. The ratio of effective length of a column which is fixed at both ends to the distance between the supports is about

a) 2.0

b) 1.0

c) 0.7

d) 0.50

38 / 50

38. The maximum strain in the tension reinforcement in the section of a flexural member at failure shall not be less than (if fy is the characteristic strength of steel and Es is the modulus of elasticity of steel)

a) 0.0020

b) fy/(1.15Es) + 0.002

c) fy/(1.15Es) + 0.003

d) 0.0300

39 / 50

39. Spacing of longitudinal bars measured along the periphery of the column should not be more than (as per IS: 456-2000)

a) 20 cm

b) 25 cm

c) 30 cm

d) 15 cm

40 / 50

40. The minimum lap length at the splice of compression reinforcement in RCC

a) 24 times the diameter of the bar or lap length

b) 30 times the diameter of the bar or lap length

c) 48 times the diameter of the bar or lap length

d) 30 times the diameter of the bar or twice the development length

41 / 50

41. The workability of concrete is directly proportional to

a) grading of the aggregate

b) time of transit

c) aggregate cement ratio

d) none of the above

42 / 50

42. In a simply supported slab, alternate bars are curtailed at

a) 1/4th of the span

b) 1/5th of the span

c) 1/6th of the span

d) 1/7th of the span

43 / 50

43. The long column takes a lesser load as compared to a short column due to

a) buckling

b) concrete

c) steel

d) length

44 / 50

44. The one-way slab is one

a) which is short and bends in two directions

b) the slab which bends only along one direction

c) reinforced in one direction only

d) all of the above

45 / 50

45. In a singly reinforced beam

a) compression is borne entirely by concrete

b) steel possesses initial stresses when embedded in concrete

c) plane sections transverse to the center line of the beam before bending remain plane sections after bending

d) elastic modulii for concrete and steel have different values within the limits of deformation of the beam

46 / 50

46. The minimum overall depth kept at the edge of R.C. footings is

a) 50 cm

b) 25 cm

c) 15 cm

d) 10 cm

47 / 50

47. Placing of concrete should preferably be done at a temperature of

a) 10°C

b) 20°C

c) 27±2°C

d) 32°C

48 / 50

48. Workability of concrete is inversely proportional to

a) water-cement ratio

b) size of aggregate

c) time of transit

d) none of the above

49 / 50

49. For a reinforced concrete section, the shape of shear stress diagram is

a) wholly parabolic

b) wholly rectangular

c) parabolic above the neutral axis and rectangular below the neutral axis

d) rectangular above the neutral axis and parabolic below the neutral axis

50 / 50

50. The minimum amount of steel required in RCC column (230x350) is

a) 360 mm²

b) 460 mm²

c) 560 mm²

d) 600 mm²

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