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 strength of concrete increases with an increase in

a) water cement ratio

b) size of aggregate

c) aggregate cement ratio

d) moisture content

2 / 50

2. When the material is loaded with tensile force at both ends, then the test is known as

a) tensile test

b) compressive test

c) shear test

d) all of the above

3 / 50

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

a) 1/5

b) 1/6

c) 1/7

d) 1/8

4 / 50

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

a) 28

b) 12

c) 20

d) 24

5 / 50

5. 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

6 / 50

6. 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

7 / 50

7. 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

8 / 50

8. The entrapped air in concrete

a) increases workability

b) decreases workability

c) increases strength

d) none of the above

9 / 50

9. The radius of bar bend to form a hook should not be less than

a) twice the diameter

b) thrice the diameter

c) four times the diameter

d) five times the diameter

10 / 50

10. 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

11 / 50

11. 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

12 / 50

12. Shear stress diagram of a homogeneous beam is

a) rectangular

b) triangular

c) parabolic

d) elliptical

13 / 50

13. High increase in temperature......the strength of concrete.

a) increases

b) has no effect

c) decreases

d) none of the above

14 / 50

14. Strength of concrete show an increase with

a) decrease in rate of loading

b) increase in rate of loading

c) unaffected by rate of loading

d) depends on the application of load

15 / 50

15. Poisson's ratio for concrete

a) increases with a richer mix

b) decreases with a richer mix

c) remains constant

d) increases with a poor mix

16 / 50

16. In cold weather, concrete curing should be continued for... days

a) 7

b) 14

c) 21

d) 28

17 / 50

17. A column fails by buckling is called a long column while failure by crushing is called

a) big column

b) long column

c) small column

d) short column

18 / 50

18. The cover provided in the column having size less than 200 mm x 200 mm is

a) 15

b) 20

c) 25

d) 40

19 / 50

19. After casting, an ordinary cement concrete on drying

a) shrinks

b) expands

c) remains unchanged

d) can expand or shrink

20 / 50

20. Shear in a concrete beam is caused by

a) props only

b) variation of B.M along the span

c) weak bond

d) none of the above

21 / 50

21. The beam section is redesigned if the shear stress exceeds the allowable shear stress by ... times

a) 2

b) 4

c) 6

d) 8

22 / 50

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

a) 100 mm

b) 200 mm

c) 300 mm

d) 400 mm

23 / 50

23. 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

24 / 50

24. The lap length of a direct tension reinforcement bar in an RCC beam should be more than

a) 30 times the diameter of the bar

b) 48 times the diameter of the bar

c) 24 times the diameter of the bar

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

25 / 50

25. A slender column is a

a) short column

b) long column

c) mix

d) column of varying cross-section

26 / 50

26. In a column, the minimum cover provided at the end of reinforcement is

a) 10 mm

b) 25 mm or 2 θ of bar, whichever is greater

c) 40 mm or greater than the diameter of the bar

d) at least θ of the bar

27 / 50

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

a) buckling

b) concrete

c) steel

d) length

28 / 50

28. Strength of concrete increases with

a) increase in water cement ratio

b) increase in fineness of cement

c) decrease in size of aggregate

d) decrease in curing time

29 / 50

29. 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

30 / 50

30. 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

31 / 50

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

a) 4%

b) 5%

c) 6%

d) 8%

32 / 50

32. 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

33 / 50

33. 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

34 / 50

34. 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

35 / 50

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

a) 10°C

b) 20°C

c) 27±2°C

d) 32°C

36 / 50

36. The slope of weep hole is generally provided at (spacing- 1.5 to 3.0m)

a) 1 in 4

b) 1 in 8

c) 1 in 16

d) 1 in 32

37 / 50

37. The shear reinforcement in an RCC beam is provided to resist

a) diagonal tension

b) diagonal compression

c) vertical shear

d) horizontal shear

38 / 50

38. 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

39 / 50

39. 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

40 / 50

40. The factor of safety for steel is based on its

a) yield stress

b) ultimate stress

c) both (a) and (b) above

d) none of the above

41 / 50

41. 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

42 / 50

42. Shear stress is not taken by

a) horizontal steel

b) vertical steel

c) inclined steel

d) none of the above

43 / 50

43. 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

44 / 50

44. The maximum ratio of span to depth ratio of a slab simply supported and spanning in one direction is

a) 25

b) 30

c) 35

d) 40

45 / 50

45. A rib slab is provided for

a) plain ceiling

b) acoustic insulation

c) heat insulation

d) all of the above

46 / 50

46. 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

47 / 50

47. The initial and final setting times for ordinary Portland cement are approximately related by (where T & t are the final and initial setting times)

a) T = 540+t

b) T = 270+t

c) T = 90+1.2t

d) T = 90+t

48 / 50

48. As per IS: 456:2000, the minimum diameter of reinforcement in a column shall not be less than

a) 12 mm

b) 16 mm

c) 18 mm

d) 20 mm

49 / 50

49. 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

50 / 50

50. In the case of a cantilever beam, main reinforcement is provided

a) on the top face of the beam

b) on the bottom face of the beam

c) on the middle face of the beam

d) all of the above

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Structural Design Online Test – Paper 3

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