FAQ’s for Structural Design Jobs

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1. Lug angles

1. are used to reduce the length of connection.

2. are unequal angles.

3. increases shear lag.

4. all the above

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2. In case of plastic design, the calculated maximum shear capacity of a beam as per IS:800 shall be (where, Aw = effective cross-sectional area resisting shear fy = yield stress of the steel)

1. 0.55 Awfy

2. 0.65 Awfy

3. 0.75 Awfy

4. 0.85 Awfy

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

1. displacement

2. load

3. slope

4. moment

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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 mechanism method of plastic analysis satisfies

1. equilibrium and mechanism conditions

2. equilibrium and plastic moment conditions

3. mechanism and plastic moment conditions

4. equilibrium condition only

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6. The moment-curvature relation at a plastic hinge is

1. linear

2. parabolic

3. constant moment for all curvatures

4. constant curvature for all moments

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7. 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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8. 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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9. The external wind pressure acting on a roof depends on

1. degree of permeability of roof

2. slope of roof

3. both a and b

4. none of the above

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10. The risk coefficient k, depends on

1. mean probable design life of structures

2. basic wind speed

3. both a and b

4. none of the above

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11. 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

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12. 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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13. The web crippling due to excessive bearing stress can be avoided by

1. increasing the web thickness

2. providing suitable stiffeners

3. increasing the length of the bearing plates

4. none of the above

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14. The slenderness ratio of lacing bars should not exceed

1. 100

2. 120

3. 145

4. 180

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15. Lacing bars in a steel column should be designed to resist

1. bending moment due to 2.5% of the column load

2. shear force due to 2.5% of the column load

3. 2.5% of the column load

4. both a and b

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16. 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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17. Angle of inclination of the lacing bar with the longitudinal axis of the column should preferably be between

1. 10° to 30°

2. 30° to 40°

3. 40° to 70°

4. 90°

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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

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19. The effective length of a battened strut effectively held in position at both ends but not restrained in direction is taken as

1. 1.8 L

2. L

3. 1.1 L

4. 1.5 L

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20. According to IS Specifications, the effective length of a column effectively held in position at both ends and restrained in direction at one end is taken as

1. 0.67 L

2. 0.8 L

3. L

4. 1.5 L

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21. 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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22. 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

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23. Bending compressive and tensile stresses respectively are calculated based on

1. net area and gross area

2. gross area and net area

3. net area in both cases

4. gross area in both cases

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24. The width of the flange of a T-beam should be less than

1. One-third of the effective span of the T-beam

2. Distance between the centres of T-beam

3. Breadth of the rib plus twelve times the thickness of the slab

4. Least of the above

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25. The effective width of a column strip of a flat slab, is

1. One-fourth the width of the panel

2. Half the width of the panel

3. Radius of the column

4. Diameter of the column

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26. 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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27. At-beam behaves as a rectangular beam of a width equal to its flange if its neutral axis

1. Remains within the flange

2. Remains below the slab

3. Coincides the geometrical centre of the beam

4. None of these

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28. 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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29. The minimum thickness of s flat slab is taken

1. L/32 for end panels without drops

2. L/36 for end panels without drops

3. L/36 for interior panels without drops

4. All the above

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30. 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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31. When a uniformly distributed load, longer than the span of the girder, moves from left to right, then the maximum bending moment at mid section of span occurs when the uniformly distributed load occupies

1. Less than the left half span

2. whole of left half span

3. More than the left half span

4. Whole span

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

1. Slope

2. Curvature

3. Deflection

4. Bending moment

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33. 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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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. According to IS codes recommendations, the maximum depth of stress block for balanced section of a beam of effective depth d is

1. 0.43 d

2. 0.55 d

3. 0.68 d

4. 0.85 d

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37. 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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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. Shell structure does not have any?

1. Bending moment

2. Shear stress

3. Tensile stress

4. Compressive stress

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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. In frame structure, what transfers the load to columns?

1. Foundation

2. Beams

3. Slabs

4. Roofs

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44. 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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45. Generally, the purlins are placed at the panel points so as to avoid

1. axial force in rafter

2. shear force in rafter

3. deflection of rafter

4. bending moment in rafter

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46. Normally, the angle of roof truss with asbestos sheets should not be less than

1. 26°/2°

2. 30°

3. 35°

4. 40°

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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 maximum spacing of vertical stiffeners is (where d is the distance between flange angles)

1. 1.33 d

2. 1.25 d

3. 1.5 d

4. 1.75 d

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49. Battening is preferable when the( i) column carries axial load only, ii) space between the two main components is not very large, iii) column is eccentrically loaded The correct answer is)

1. only (i)

2. only (iii)

3. (i) and (ii)

4. (ii) and (iii)

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50. Which of the following types of riveted joint is free from bending stresses ?

1. lap joint

2. butt joint with single cover plate

3. butt joint with double cover plates

4. none of the above

Your score is

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