FAQ’s for Structural Design Jobs

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1. In the virtual work method, the virtual quantity is

1. displacement

2. load

3. slope

4. moment

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2. 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

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3. 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

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4. If the floor is supported at or near the bottom but top chords of a bridge are not braced, then the bridge is called

1. deck type

2. through type

3. half through type

4. double deck type

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5. 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

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6. Steel tanks are mainly designed for

1. weight of tank

2. wind pressure

3. water pressure

4. earthquake forces

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7. Intermediate vertical stiffeners in a plate girder need be provided if the depth of web exceeds 9where t is thickness of web)

1. 501 t

2. 851 t

3. 200 t

4. 2501 t

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8. Minimum spacing of vertical stiffeners is limited to (where d is the distance between flange angles)

1. d/4

2. d/3

3. d/2

4. 2d/3

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9. Shear buckling of web in a plate girder is prevented by using

1. vertical intermediate stiffener

2. horizontal stiffener at neutral axis

3. bearing stiffener

4. none of the above

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10. 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

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11. The use of tie plates in laced columns is

1. prohibited

2. not prohibited

3. permitted at start and end of lacing system only

4. permitted between two parts of the lacing

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

1. lacing

2. battening

3. tie plates

4. perforated cover plates

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13. The maximum slenderness ratio of a compression member carrying both dead and superimposed load is

1. 180

2. 200

3. 250

4. 350

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14. According to IS Specifications, the maximum pitch of rivets in compression is (where t is thickness of thinnest outside plate or angle)

1. lesser of 200 mm and 12 t

2. lesser of 200 mm and 161

3. lesser of 300 mm and 32 t

4. lesser of 3 00 mm and 24 t

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15. In the cross-section of a weld, throat is the

1. minimum dimension

2. average dimension

3. maximum dimension

4. none of the above

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16. 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

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17. Diameter of a bolt hole is usually taken as

1. gross diameter of bolt

2. nominal diameter + 1.5 mm

3. nominal diameter + 2.0 mm

4. nominal diameter of bolt

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18. Select the correct statement

1. Material cost of a rivet is higher than that of a bolt.

2. Tensile strength of a bolt is lesser than that of a rivet.

3. Bolts are used as a temporary fastening whereas rivets are used as permanent fastenings.

4. Riveting is less noisy than bolting.

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19. The difference between gross diameter and nominaldia meter for the rivets up to 25 mm diameter is

1. 1.0 mm

2. 1.5 mm

3. 2.0 mm

4. 2.5 mm

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20. When the axis of load lies in the plane of rivet group, then the rivets are subjected to

1. only shear stresses

2. only tensile stresses

3. both (a)and (b)

4. none of the above

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21. In a gusseted base, when the end of the column is machined for complete bearing on the base plate, then the axial load is assumed to be transferred to base plate

1. fully by direct bearing

2. fully through fastenings

3. 50% by direct bearing and 50% through fastenings

4. 75% by direct bearing and 25% through fastenings

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22. 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

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23. 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

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24. For the design of a simply supported T-beam the ratio of the effective span to the overall depth of the beam is limited to

1. 10

2. 15

3. 20

4. 25

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25. The maximum ratio of span to depth of a slab simply supported and spanning in two directions, is

1. 25

2. 30

3. 35

4. 40

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26. If the length of an intermediate span of a continuous slab is 5m, the length of the end span is kept

1. 4.5 m

2. 4.0 m

3. 3.5 m

4. 3.0 m

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27. The spacing of the main bars in a simply supported slab, should not exceed its effective depth by

1. Three times

2. Four times

3. Five times

4. Six times

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

1. 1/4th of the span

2. 1/5th of the span

3. 1/6th of the span

4. 1/7th of the span

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29. The width of the flange of a L-beam, should be less than

1. One-sixth of the effective span

2. Breadth of the rib + four times thickness of the slab

3. Breadth of the rib + half clear distance between ribs

4. Least of the above

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30. If the width of the foundation for two equal columns is restricted, the shape of the footing generally adopted, is

1. Square

2. Rectangular

3. Triangular

4. Trapezoidal

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31. In the displacement method of structural analysis, the basic unknowns are

1. Displacements

2. Force

3. Displacements and forces

4. None of the above

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32. Which of the following methods of structural analysis is a force method?

1. Slope deflection method

2. Column analogy method

3. Moment distribution method

4. None of the above

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33. Which of the following is not the displacement method?

1. Equilibrium method

2. Column analogy method

3. Moment distribution method

4. Kani’s method

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

1. 2-Jan

2. 4-Mar

3. 1

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35. 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

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36. When shear stress exceeds the permissible limit in a slab, then it is reduced by

1. Increasing the depth

2. Providing shear reinforcement

3. Using high strength steel

4. Using thinner bars but more in number

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37. A truss containing j joints and m members, will be a simple truss if?

1. m = 2j – 3

2. j = 2m – 3

3. m = 3j – 2

4. j = 3m – 2

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38. A lift of weight W is lifted by a rope with an acceleration f. if the area of cross-section of the rope is A, the stress in the rope is?

1. [W(1+f/G)]/A

2. (1-g/f)/A

3. [W(2+f/G)]/A

4. [W(2+g/f)]A

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39. If a concrete column 200×200 mm in cross-section is reinforced with four steel bars of 1200 mm2 total cross-sectional area. Calculate the safe load for the column if permissible stress in concrete is 5 N/mm2 and Es is 15Ec?

1. 264 MN

2. 274 MN

3. 284 MN

4. 294 MN

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40. 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

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41. A cantilever of length is subjected to a bending moment at its free end If EI is the rigidity of the section, the deflection of the free end, is?

1. ML/EI

2. ML/2EI

3. ML2/2EI

4. ML2/3EI

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42. Normally in a truss structure, tension occurs at/for?

1. Joints

2. Base

3. Bottom chords

4. Top chords

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43. Which of the below is a disadvantage of frame structure?

1. Ease of construction

2. Economy

3. Speed of construction

4. Large Span lengths

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44. For a cantilever of effective depth of 0.5m, the maximum span to satisfy vertical deflection limit is?

1. 4.5 m

2. 5 m

3. 3.5 m

4. 4 m

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45. The sway bracing is designed to transfer

1. 2Vi % of the top panel wind load to bottom bracing

2. 10% of the top panel wind load to bottom bracing

3. 25% of the top panel wind load to bottom bracing

4. 50% of the top panel wind load to bottom bracing

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46. 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

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47. The maximum permissible span of asbestos cement sheets is

1. 650 mm

2. 810 mm

3. 1250 mm

4. 1680 mm

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48. Intermediate vertical stiffeners in a plate girder need be provided if the depth of web exceeds (where t is thickness of web)

1. 501

2. 851

3. 200 t

4. 2501

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49. 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

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50. When the axis of load lies in the plane of rivet group, then the most heavily loaded rivet will be the one which (where, Fa is the load shared by each rivet due to axial load and F mis the shearing load due to moment in any rivet.)

1. is at the maximum distance from CG of the rivet group

2. is at the minimum distance from CG of the rivet group

3. gives the maximum angle between the two forces Fa and Fm

4. gives the minimum angle between the two forces Fa and Fm

Your score is

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