FAQ’s for Structural Design Jobs

/50

1 / 50

1. The minimum thickness of a steel plate, which is directly exposed to weather and is not accessible for cleaning and repainting, should be:

1. 4.5 mm

2. 6 mm

3. 8 mm

4. 10 mm

2 / 50

2. The elastic strain for steel is about

1. 1/12 of strain at the initiation of strain hardening and about1/120 of maxi-mum strain

2. 1/2 of strain at the initiation of strain hardening and about 1/12of maxi-mum strain

3. 1/12 of strain at the initiation of strain hardening and 1/200 of maximum strain

4. 1/24 of strain at the initiation of strain hardening and about1/200 of maximum strain

3 / 50

3. The least dimension in case of a circular column of diameter D is taken as

1. 0.5 D

2. 0.68 D

3. 0.88 D

4. D

4 / 50

4. The bracing provided in the plane of end posts is called

1. sway bracing

2. portal bracing

3. top lateral bracing

4. bottom lateral bracing

5 / 50

5. The centrifugal force due to curvature of track is assumed to act on the bridge at a height of

1. 1.23 m above the rail level

2. 1.50 m above the rail level

3. 1.83 m above the rail level

4. 2.13 m above the rail level

6 / 50

6. The effect of racking forces is considered in the design of i) lateral braces, ii) chord members. The correct answer is

1. only (i)

2. only (ii)

3. both (i) and (ii)

4. none of the above

7 / 50

7. If the loaded length of span in meters of a railway steel bridge carrying a single track is 6 m, then impact factor is taken as

1. 0.5 Only

2. 0.1 Only

3. between 0.5 and 1.0

4. 0.2 Only

8 / 50

8. Hudson’s formula gives the dead weight of a truss bridge as a function of

1. bottom chord area

2. top chord area

3. effective span of bridge

4. heaviest axle load of engine

9 / 50

9. The allowable tensile stress in structural mild steel plates for steel tank is assumed as

1. 150.0 MPa on gross area

2. 95.0 MPa on net area

3. 105.5 MPa on net area

4. 105.5 MPa on gross area

10 / 50

10. The number of seismic zones in which the country has been divided are

1. 3

2. 4

3. 5

4. 6

11 / 50

11. Steel tanks are mainly designed for

1. weight of tank

2. wind pressure

3. water pressure

4. earthquake forces

12 / 50

12. Minimum pitch provided in riveted steel tanks is (where d is diameter of rivets)

1. 1.5 d

2. 2.0 d

3. 2.5 d

4. 3.0 d

13 / 50

13. Rivets connecting flange angles to cover plates in a plate girder are subjected to

1. horizontal shear only

2. vertical load only

3. both a and b

4. none of the above

14 / 50

14. Bearing stiffener in a plate girder is used to

1. transfer the load from the top flange to the bottom one

2. prevent buckling of web

3. decrease the effective depth of web

4. prevent excessive deflection

15 / 50

15. Economical depth of a plate girder corresponds to

1. minimum weight

2. minimum depth

3. maximum weight

4. minimum thickness of web

16 / 50

16. The overlap of batten plates with the main members in welded connections should be more than (where t = thickness of the batten plate)

1. 3t

2. 4t

3. 6t

4. 8t

17 / 50

17. The effective length of a battened column is increased by

1. 0.05

2. 0.1

3. 0.15

4. 0.2

18 / 50

18. According to IS:800, in the Merchant Rankine formula the value of imperfection index (n) is

1. 1

2. 1.4

3. 1.8

4. 2

19 / 50

19. The best arrangement to provide unified behavior inbuilt up steel columns is by

1. lacing

2. battening

3. tie plates

4. perforated cover plates

20 / 50

20. If the 20 mm rivets are used in lacing bars, then the minimum width of lacing bar should be

1. 40mm

2. 60mm

3. 80mm

4. 100mm

21 / 50

21. The actual thickness of butt weld as compared to the thickness of plate is usually

1. more

2. less

3. equal

4. none of the above

22 / 50

22. When the bolts are subjected to reversal of stresses, the most suitable type of bolt is

1. black bolt

2. ordinary unfinished bolt

3. turned and fitted bolt

4. high strength bolt

23 / 50

23. By providing sufficient edge distance, which of the following failures of riveted joint can be avoided?

1. tension failure of the plate

2. shear failure of the rivet

3. shear failure of the plate

4. crushing failure of the rivet

24 / 50

24. If the thickness of plate to be connected by a rivet is 16mm, then suitable size of rivet as per Unwin’s formula will be

1. 16 mm

2. 20 mm

3. 24 mm

4. 27 mm

25 / 50

25. If the thickness of thinnest outside plate is 10 mm, then the maximum pitch of rivets in tension will be taken as

1. 120 mm

2. 160 mm

3. 200 mm

4. 300 mm

26 / 50

26. The minimum number of main steel bars provided in R.C.C.

1. All the above

2. Rectangular columns are 4

3. Circular columns are 6

4. Octagonal columns are 8

27 / 50

27. If the size of a column is reduced above the floor, the main bars of the column, are

1. Continued up

2. Bent inward at the floor level

3. Stopped just below the floor level and separate lap bars provided

4. All the above

28 / 50

28. With usual notations the depth of the neutral axis of a balanced section, is given by

1. mc/t=(d-n)/n

2. t/mc=(d-n)/n

3. t/mc=(d+n)/n

4. mc/t=n/(d-n)

29 / 50

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

1. Tension is resisted by tension steel

2. Compression is resisted by compression steel

3. Stress in tension steel equals the stress in compression steel

4. All the above

30 / 50

30. The width of the rib of a T-beam , is generally kept between

1. 1/7 to 1/3 of rib depth

2. 1/3 to 1/2 of rib depth

3. 1/2 to 3/4 of rib depth

4. 1/3 to 2/3 of rib depth

31 / 50

31. By over-reinforcing a beam, the moment of resistance can be increased not more than

1. 0.1

2. 0.15

3. 0.2

4. 0.25

32 / 50

32. The steel generally used in R.C.C. work, is

1. Stainless steel

2. TOR Steel

3. Mild steel3

4. High tension steel

33 / 50

33. The maximum thickness of the cover at the end of a reinforcing bar should not be less than twice the diameter of the bar subject to a minimum of

1. 10 mm

2. 15 mm

3. 20 mm

4. 25 mm

34 / 50

34. The maximum bending moment due to a train of wheel loads on a simply supported girder

1. Always occurs at center of span

2. Always occurs under a wheel load

3. Never occurs under a wheel load

4. None of the above

35 / 50

35. For a two-hinged arch, if one of the supports settles down vertically, then the horizontal thrust

1. Is increased

2. Is decreased

3. Remains unchanged

4. Becomes zero

36 / 50

36. Bending moment at any section in a conjugate beam gives in the actual beam

1. Slope

2. Curvature

3. Deflection

4. Bending moment

37 / 50

37. While using three moments equation, a fixed end of a continuous beam is replaced by an additional span of

1. Zero length

2. Infinite length

3. Zero moment of inertia

4. None of the above

38 / 50

38. The three moments equation is applicable only when

1. The beam is prismatic

2. There is no settlement of supports

3. There is no discontinuity such a hinges within the span

4. The spans are equal

39 / 50

39. The carryover factor in a prismatic member whose far end is fixed is

1. 2-Jan

2. 4-Mar

3. 1

40 / 50

40. In moment distribution method, the sum of distribution factors of all tha members meeting at any joint is always

1. Zero

2. Less than 1

3. 1

4. Greater than 1

41 / 50

41. A steel rod 1 meter long having square cross section is pulled under a tensile load of 8 tones the extension in the rod was 1 mm only. if E steel=2x106kg/cm2, the side of the rod, is

1. 1 cm

2. 1.5 cm

3. 2 cm

4. 2.5 cm

42 / 50

42. The maximum deflection due to a load W at the free end of a cantilever of length L and having flexural rigidity EI, is?

1. WL2/2EI

2. wL2/3EI

3. wL3/2EI

4. wL3/3EI

43 / 50

43. The maximum deflection due to a uniformly distributed load w/unit length over entire span of a cantilever of length l and of flexural rigidly EI, is?

1. wl3/3EI

2. w14/3EI

3. w14/8EI

4. w14/12EI

44 / 50

44. A rod of uniform cross-section A and length L force P. The young’s modules E of the material, is?

1. E=/A. L

2. E=/P. L

3. E=/P. L/A

4. E=/P. A

45 / 50

45. For a simply supported beam of span 15m, the maximum effective depth to satisfy vertical deflection limit should be?

1. 600 mm

2. 750 mm

3. 900 mm

4. More than 1 m

46 / 50

46. The effect of racking forces is considered in the design of ( i) lateral braces, ii) chord members) The correct answer is

1. only (i)

2. only (ii)

3. both (i) and (ii)

4. none of the above

47 / 50

47. For the buildings having a low permeability, the internal wind pressure acting normal to the wall and roof surfaces is taken as (where p is basic wind pressure)

1. zero

2. ±0.2p

3. ± 0.5 p

4. ±0.7p

48 / 50

48. The maximum permissible span of asbestos cement sheets is

1. 650 mm

2. 810 mm

3. 1250 mm

4. 1680 mm

49 / 50

49. The range of economical spacing of trusses varies from

1. L/3 to L/5

2. L/4to2L/5

3. L/3 to L/2

4. 2L/5 to 3L/5 where L is span

50 / 50

50. Minimum pitch of the rivets shall not be less than where d is gross diameter of rivet

1. 1.5 d

2. 2.0 d

3. 2.5 d

4. 3.0 d

Your score is

© 2023 Civil Jobs Training, All rights reserved