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 effective width of a column strip of a flat slab is

a) one-fourth the width of the panel

b) half the width of the panel

c) radius of the column

d) diameter of the column

2 / 50

2. 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

3 / 50

3. The compressive strength of concrete determined from a 150mm × 150mm cylinder as compared to that determined from a 150mm cube is

a) more

b) less

c) equal

d) none of the above

4 / 50

4. The minimum number of main bars in a circular column is

a) 4

b) 6

c) 8

d) 12

5 / 50

5. If the corners of a two-way slab are held down firmly

a) buckling takes place

b) deflection at the center increases

c) cracks develop near the corners

d) all of the above

6 / 50

6. 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

7 / 50

7. A doubly reinforced beam is used

a) when extra safety factor is required

b) when the depth and width of the beam are restricted

c) when the depth of the beam is more than the width

d) a large moment of resistance is desired

8 / 50

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

a) 4%

b) 5%

c) 6%

d) 8%

9 / 50

9. The length of the straight portion of a bar beyond the end of the hook should be at least

a) four times the diameter

b) five times the diameter

c) six times the diameter

d) seven times the diameter

10 / 50

10. 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

11 / 50

11. A rib slab is provided for

a) plain ceiling

b) acoustic insulation

c) heat insulation

d) all of the above

12 / 50

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

a) 10°C

b) 20°C

c) 27±2°C

d) 32°C

13 / 50

13. In a rectangular R.C.C beam, the ratio of the maximum shear stress to average shear stress is

a) 1.25

b) 1.33

c) 1.43

d) 1.53

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. The size of fine aggregates does not exceed

a) 2.75 mm

b) 3.75 mm

c) 4.75 mm

d) 5.75 mm

16 / 50

16. The minimum diameter of bars for a slab is generally

a) 6 mm

b) 8 mm

c) 10 mm

d) 12 mm

17 / 50

17. The maximum spacing between longitudinal bars in a column is

a) 200 mm

b) 300 mm

c) 400 mm

d) 500 mm

18 / 50

18. After casting, an ordinary cement concrete on drying

a) shrinks

b) expands

c) remains unchanged

d) can expand or shrink

19 / 50

19. In the working stress design, the allowable bending compressive strain in RCC is

a) 0.003

b) 0.0003

c) 0.002

d) none of the above

20 / 50

20. Shear stress diagram of a homogeneous beam is

a) rectangular

b) triangular

c) parabolic

d) elliptical

21 / 50

21. Modulus of elasticity for concrete improves by

a) age

b) higher w/c ratio

c) shorter curing period

d) all of the above

22 / 50

22. Workability of concrete is inversely proportional to

a) water-cement ratio

b) size of aggregate

c) time of transit

d) none of the above

23 / 50

23. 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

24 / 50

24. In a singly reinforced beam, the effective cover is measured from

a) centroid of steel

b) inner face of outer steel

c) all of the above

d) outer face of outer steel

25 / 50

25. Weep holes are provided in retaining and breast walls to

a) increase compaction

b) increase architectural beauty

c) drain off the water from the fillings

d) none of the above

26 / 50

26. 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

27 / 50

27. A T-beam behaves like a rectangular beam of width equal to its flange if its neutral axis

a) remains within the flange

b) remains within the web

c) coincides with the geometrical center of the beam

d) none of the above

28 / 50

28. The load-carrying capacity of helically reinforced column compared to a tied column is

a) 5% less

b) 5% more

c) 10% less

d) 10% more

29 / 50

29. 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

30 / 50

30. The maximum bulking of sand generally occurs at a percentage moisture content of

a) 5

b) 8

c) 11

d) 4

31 / 50

31. The enlarged head of a supporting column of a flat slab is technically known as

a) capital

b) drop panel

c) column head

d) none of the above

32 / 50

32. The minimum length of the bar which must be embedded in concrete beyond any section to develop bond is

a) development length

b) lap length

c) splice length

d) curved length

33 / 50

33. The ratio of diameter of reinforcing bars and the slab thickness is

a) 1/5

b) 1/6

c) 1/7

d) 1/8

34 / 50

34. Due to shrinkage stress, a simply supported beam having reinforcement only at the bottom tends to

a) deflect downward

b) deflect upward

c) deflect upward or downward

d) none of the above

35 / 50

35. The workability of concrete can be improved by

a) more sand

b) more cement

c) more fine aggregate

d) fineness of coarse aggregate

36 / 50

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

a) 4

b) 6

c) 8

d) 12

37 / 50

37. As the size of the cube increases, the strength of the cube

a) decreases

b) increases

c) increases but decreasing rate

d) decreases but decreasing rate

38 / 50

38. The strength of concrete is directly proportional to

a) cement water ratio

b) water cement ratio

c) sand cement ratio

d) water aggregate ratio

39 / 50

39. The approximate ratio of the direct tensile strength to direct compressive strength test

a) 0.33

b) 0.25

c) 0.10

d) 0.05

40 / 50

40. Factor of safety is given by

a) ultimate load /working load

b) working load / ultimate load

c) (w+u)load

d) (u-w)load

41 / 50

41. The types of failure occurring in a beam due to shear force is termed as

a) diagonal tension failure

b) flexural tension failure

c) diagonal compression failure

d) all of the above

42 / 50

42. If the thickness of the slab is 100 mm then the maximum diameter of the bar placed in the slab should be

a) 8 mm

b) 10 mm

c) 12 mm

d) 16 mm

43 / 50

43. 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

44 / 50

44. Minimum spacing between horizontal parallel reinforcements of different sizes should not be less than

a) one times the thinner bar

b) two times the thinner bar

c) one times the thicker bar

d) two times the thicker bar

45 / 50

45. 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

46 / 50

46. 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

47 / 50

47. Inert material of cement concrete mix is

a) water

b) cement

c) aggregate

d) all of the above

48 / 50

48. Generally, the compressive strength of the cover block is more than the compressive strength of the concrete. The main function of the cover block is

a) maintain cover on the side of steel

b) maintain cover below steel

c) maintain cover above steel

d) maintain cover between steel and formwork

49 / 50

49. In a doubly reinforced beam, the maximum shear stress occurs

a) along the centroid

b) along the natural axis

c) on planes between the neutral axis and the tensile reinforcement

d) on planes between the neutral axis and the compressive reinforcement

50 / 50

50. Fineness modulus of fine aggregate is between

a) 2-3.5

b) 3.5-5.0

c) 5-6.0

d) 6-7.0

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Structural Design Online Test – Paper 3

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