FAQ’s for Structural Design Jobs

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1. Pitch of tacking rivets, when double angles connected back-to-back and acting as tension members should not be more than

1. 500 mm

2. 600 mm

3. 1000 mm

4. 300 mm

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2. For rivets in tension with counter-sunk heads, the tensile value shall be

1. reduced by 25 %

2. reduced by 33.3%

3. increased by 25 %

4. increased by 33.3 %

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3. Which of the following conditions is to be satisfied both in elastic and plastic analysis?

1. equilibrium condition

2. yield condition

3. plastic moment condition

4. mechanism condition

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4. Other conditions being same, the load factor in indeterminate structures is

1. equal to load factor in determinate structures

2. more than the load factor in determinate structures

3. less than the load factor in determinate structures

4. unpredictable

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5. The ratio of plastic section modulus to elastic section modulus

1. is equal to 1

2. is always less than 1

3. is always greater than 1

4. can be less than 1

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6. In case of timber structures, the form factor for solid circular cross-section is taken as

1. 1.18

2. 1.414

3. 1.67

4. 1.81

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7. 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

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8. 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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9. 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

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10. As per IS: 875, for the purposes of specifying basic wind velocity, the country has been divided into

1. 4 zones

2. 5 zones

3. 6 zones

4. 7 zones

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11. Which of the following sections should preferably be used at places where torsion occurs?

1. angle section

2. channel section

3. box type section

4. any of the above

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12. 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

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13. The bracing between two columns of a steel tank will be designed to resist

1. horizontal shear due to wind or earthquake only

2. horizontal, shear due to wind or earthquake + 2.5% of column loads

3. column loads + 2.5% of horizontal shear due to wind or earthquake

4. column loads + full horizontal shear due to wind or earthquake

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14. The capacity of the smallest pressed steel tank is

1. 1000 liters

2. 1650 liters

3. 1950 liters

4. 2450 liters

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15. The basic wind speed is specified at a height ‘h’ above mean ground level in an open terrain. The value of ‘h’ is

1. 10 m

2. 20 m

3. 25 m

4. 50 m

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16. 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

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

1. 0.05

2. 0.1

3. 0.15

4. 0.2

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19. The maximum slenderness ratio of a steel column, the design of which is governed by wind or seismic forces is

1. 150

2. 200

3. 250

4. 350

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20. 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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21. A butt weld is specified by

1. effective throat thickness

2. plate thickness

3. size of weld

4. penetration thickness

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22. 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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23. 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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24. 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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25. When the axis of load lies in the plane of rivet group, then the most heavily loaded rivet will be the one which

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

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26. 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

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27. As the percentage of steel increases

1. Depth of neutral axis decreases

2. Depth of neutral axis increases

3. Lever arm increases

4. Lever arm decreases

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28. 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

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29. 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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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. 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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32. When a uniformly distributed load, shorter than the span of the girder, moves from left to right, then the conditions for maximum bending moment at a section is that

1. The head of the load reaches the section

2. The tail of the load reaches the section

3. The load position should be such that the section divides it equally on both sides

4. The load position should be such that the section divides the load in the same ratio as it divides the span

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33. 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

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34. 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

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35. In the slope deflection equations, the deformations are considered to be caused by

1. Bending moment

2. Shear force

3. Axial force

4. Both b & c

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36. If the size of panel in a flat slab is 6m x 6m, then as per Indian standard code, the widths of column strip and middle strip are

1. 3.0 m and 1.5 m

2. 1.5 m and 3.0 m

3. 3.0 m and 3.0 m

4. 1.5 m and 1.5 m

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37. 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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38. 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

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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 simply supported beam carries varying load from zero at one end and W at the other end. If the length of the beam is a, the maximum bending moment will be?

1. wa/27

2. wa2/27

3. w2a

4. wa2

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41. A simply supported beam A carries a point load at its mid span. Another identical beam B carries the same load but uniformly distributed over the entire span. The ratio of the maximum deflections of the beams A and B, will be?

1. 3-Feb

2. 2-Mar

3. 8-May

4. 5-Aug

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42. Shell structure does not have any?

1. Bending moment

2. Shear stress

3. Tensile stress

4. Compressive stress

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43. One of the criteria for the effective width of flange of T-beam is bf =-+bw+6Df6 in above formula, lo signifies?

1. Effective span of T-beam

2. Distance between points of zero moments in the beam

3. Distance between points of maximum moments in the beam

4. Clear span of the T-beam

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44. The basic wind speed is specified at a height ‘h’ above mean ground level in an open terrain. The value of ’h’ is

1. 10 m

2. 20 m

3. 25 m

4. 50 m

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45. The live load for a sloping roof with slope 15°, where access is not provided to roof, is taken as

1. 0.65 kN/m2

2. 0.75 kN/m2

3. 1.35 kN/m2

4. 1.50 kN/m2

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46. To minimize the total cost of a roof truss, the ratio of the cost of truss to the cost of purlins shall be

1. 1

2. 2

3. 3

4. 4

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47. Bearing stiffeners are provided at ( i) the supports, ii) the mid span, iii) the point of application of concentrated loads) The correct answer is

1. only (i)

2. both (i) and (ii)

3. both (i) and (iii)

4. (i), (ii) and (iii)

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48. 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

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49. 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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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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