FAQ’s for Structural Design Jobs

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1. The allowable shear stress in the web of mild steel beams decreases with (where ‘h’ is height and t is thickness)

1. decrease in h/t ratio

2. increase in h/t ratio

3. decrease in thickness

4. increase in height

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2. For a compression member with double angle section, which of the following section will give larger value of minimum radius of gyration?

1. equal angles back-to-back

2. unequal legged angles with long legs back-to-back

3. unequal legged angles with short legs back-to-back

4. both b or c

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3. 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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4. The shape factor of an isosceles triangle for bending about the axis parallel to the base is:

1. 1.5

2. 1.7

3. 2

4. 2.34

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

1. displacement

2. load

3. slope

4. moment

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6. 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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7. 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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8. The statical 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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9. 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

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10. 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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11. The portal bracing in a truss bridge is used to

1. transfer load from top of end posts to bearings

2. keep the rectangular shape of the bridge cross-section

3. stiffen the structure laterally

4. prevent the sidesway buckling of top chord

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12. 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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13. 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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14. 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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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. 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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17. As per IS: 800, for compression flange, the outstand of flange plates should not exceed (where t = thickness of thinnest flange plate)

1. 121

2. 161

3. 201

4. 251

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18. Minimum thickness of web in a plate girder, when the plate is accessible and also exposed to weather, is

1. 5 mm

2. 6 mm

3. 8 mm

4. 10 mm

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19. Economical depth of a plate girder corresponds to

1. minimum weight

2. minimum depth

3. maximum weight

4. minimum thickness of web

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20. 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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21. 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

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22. 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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23. A butt weld is specified by

1. effective throat thickness

2. plate thickness

3. size of weld

4. penetration thickness

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24. 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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25. Efficiency of a riveted joint, having the minimum pitch as per IS: 800, is

1. 0.4

2. 0.5

3. 0.6

4. 0.7

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26. 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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27. 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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28. 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

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29. 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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30. 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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31. 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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32. 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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33. 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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34. The self-weight of the footing, is

1. Not considered for calculating the upward pressure on footing

2. Also considered for calculating the upward pressure on footing

3. Not considered for calculating the area of the footing

4. Both B. and C.

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35. The nutral axis of a T-beam exists

1. Within the flange

2. At the bottom edge of the slab

3. Below the slab

4. All the above

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36. 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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37. Which of the following methods of structural analysis is a displacement method?

1. Moment distribution method

2. Column analogy method

3. Three moment equation

4. None of the above

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38. 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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39. 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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40. 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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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. 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. For a continuous slab of 3m 3.5m size, the minimum overall depth of slab to satisfy vertical deflection limits is?

1. 50 mm

2. 75 mm

3. 100 mm

4. 120 mm

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46. The relation between intensity of wind pressure p and velocity of wind V is taken as

1. pa V

2. paV2

3. p a (1/V)

4. paV”2

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47. 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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48. 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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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

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50. 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)

Your score is

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