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 maximum reinforcement in a column to consider the practical problem is

a) 4%

b) 5%

c) 6%

d) 8%

2 / 50

2. A rib slab is provided for

a) plain ceiling

b) acoustic insulation

c) heat insulation

d) all of the above

3 / 50

3. An air entraining agent when added in concrete improves

a) strength

b) workability

c) density

d) durability

4 / 50

4. The minimum cover to the ties or spiral should not be less than

a) 8 mm

b) 10 mm

c) 12 mm

d) 25 mm

5 / 50

5. Workability of concrete is inversely proportional to

a) water-cement ratio

b) size of aggregate

c) time of transit

d) none of the above

6 / 50

6. Shear reinforcement in an RCC beam is used for

a) bending moment

b) shear force

c) moment of resistance

d) none of the above

7 / 50

7. 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%

8 / 50

8. The minimum vertical spacing of the main bars in an RCC beam should be

a) diameter of the bar or maximum size of the aggregate + 5mm

b) maximum size of the bar

c) maximum size of the bar or 2/3 maximum size of the aggregate

d) none of the above

9 / 50

9. The ratio of modulus of elasticity of steel to that of concrete is

a) modular ratio

b) Poisson's ratio

c) elasticity ratio

d) none of the above

10 / 50

10. The unit weight of RCC is taken as

a) 2.2 t/m³

b) 2.3 t/m³

c) 2.4 t/m³

d) 2.5 t/m³

11 / 50

11. The amount of reinforcement for main bars in a slab is based on

a) minimum shear force

b) maximum shear force

c) minimum bending moment

d) maximum bending moment

12 / 50

12. The minimum cover to the main bars in an RCC beam should be

a) 15mm or diameter of the bar

b) 25mm or diameter of the bar

c) 25mm size of the aggregate

d) 40 mm or diameter of the bar

13 / 50

13. Factor of safety is given by

a) ultimate load /working load

b) working load / ultimate load

c) (w+u)load

d) (u-w)load

14 / 50

14. 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

15 / 50

15. 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

16 / 50

16. The moment of resistance of an under-reinforced section is computed on the basis of

a) compressive force developed in concrete

b) tensile force developed in steel

c) both of the above

d) none of the above

17 / 50

17. 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

18 / 50

18. In R.C.C. beams, the tension reinforcement can be cut off at a point when it is no longer needed if

a) enough bond length is available

b) shear at the cut-off point does not exceed two-thirds of permissible at that section

c) bending moment is zero

d) none of the above

19 / 50

19. The resistance offered to slipping of steel bars in concrete is due to

a) adhesion

b) frictional resistance

c) mechanical resistance

d) all of the above

20 / 50

20. A column is considered as a long column if its slenderness ratio is more than

a) 40

b) 20

c) 24

d) 28

21 / 50

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

a) 10°C

b) 20°C

c) 27±2°C

d) 32°C

22 / 50

22. 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

23 / 50

23. Strength of concrete increases with

a) increase in water cement ratio

b) decrease in water cement ratio

c) decrease in size of aggregate

d) decrease in curing time

24 / 50

24. 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

25 / 50

25. Bond strength of HYSD bar as compared to plain bar is more by

a) 20%

b) 30%

c) 40%

d) 60%

26 / 50

26. The center-to-center spacing of vertical stirrups in a rectangular beam is

a) minimum near the support

b) maximum near the support

c) minimum near the center

d) none of the above

27 / 50

27. In an RCC beam, N.A means

a) not applicable

b) neutral axis

c) natural axis

d) normal axis

28 / 50

28. 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

29 / 50

29. According to the load factor method, the permissible load W on a short column reinforced with longitudinal bars and lateral stirrups is

a) stress in concrete × area of concrete

b) stress in steel × area of steel

c) stress in concrete × area of concrete + stress in steel × area of steel

d) none of the above

30 / 50

30. For a two-way slab, the main reinforcement is provided along the

a) length of the slab

b) breadth of the slab

c) diagonal of the slab

d) none of the above

31 / 50

31. The safe bond stress between concrete and steel is determined by

a) tensile test

b) compressive test

c) shear test

d) pull-out test

32 / 50

32. Minimum embedment of reinforcement in a concrete flexural member should be

a) 30 θ

b) 40 θ

c) 50 θ

d) 60 θ

33 / 50

33. The states of concrete are

a) elastic and hardened state

b) elastic and plastic state

c) plastic and hardened state

d) none of the above

34 / 50

34. If a beam fails in bond, then

a) increase the depth of the beam

b) use thicker but fewer numbers of bars

c) use thinner but more numbers of bars

d) providing vertical stirrups

35 / 50

35. 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

36 / 50

36. 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

37 / 50

37. 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

38 / 50

38. Inert material of cement concrete mix is

a) water

b) cement

c) aggregate

d) all of the above

39 / 50

39. Shear stress is not taken by

a) horizontal steel

b) vertical steel

c) inclined steel

d) none of the above

40 / 50

40. 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

41 / 50

41. A balanced design of a beam is a condition where the ..... stresses occurring are equal to the permissible stress.

a) least

b) average

c) greatest

d) none of these

42 / 50

42. The anchorage value of the standard hook is taken as 16 times the diameter of the reinforcing bar if the angle of the bend is equal to

a) 30°

b) 40°

c) 180°

d) any of the above

43 / 50

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

a) same

b) lower

c) higher

d) constant

44 / 50

44. In the analysis of a doubly reinforced beam, the assumption made is

a) tension is resisted by concrete only

b) compression is resisted by concrete only

c) the deformations in concrete and steel on both sides remain proportional to their distance from the neutral axis

d) all of the above

45 / 50

45. An RCC element, 1 m deep and 0.5 m wide will require minimum reinforcement @ 1% of the gross sectional area, what will be the area of reinforcing bars?

a) 500 mm²

b) 1000 mm²

c) 5000 mm²

d) 50,000 mm²

46 / 50

46. Shear stress diagram of a homogeneous beam is

a) rectangular

b) triangular

c) parabolic

d) elliptical

47 / 50

47. The size of fine aggregates does not exceed

a) 2.75 mm

b) 3.75 mm

c) 4.75 mm

d) 5.75 mm

48 / 50

48. 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

49 / 50

49. Fineness modulus of fine aggregate is between

a) 2-3.5

b) 3.5-5.0

c) 5-6.0

d) 6-7.0

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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Structural Design Online Test – Paper 3

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