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 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 connection of intermediate vertical stiffeners to the web, not subjected to external loads, shall be designed for a minimum shear force (kN/m) of (where, t = the web thickness in mm, h = the outstand of stiffener in mm)

1. 75 t2/h

2. 125 t3/h2

3. 125 t2/h

4. 175 t2/h

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5. 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

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6. 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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7. 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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8. 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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9. Load factor is

1. always equal to factor of safety

2. always less than factor of safety

3. always greater than factor of safety

4. sometimes greater than factor of safety

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10. 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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11. The mechanism method and the statical method give

1. lower and upper bounds respectively on the strength of structure

2. upper and lower bounds respectively on the strength of structure

3. lower bound on the strength of structure

4. upper bound on the strength of structure

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12. 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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13. 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

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14. The diameter of base of conical flare of a steel stack is (where d is the diameter of the cylindrical part)

1. less than d

2. equal to d

3. more than d

4. all of the above

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

1. 3

2. 4

3. 5

4. 6

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17. 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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18. Gantry girders are designed to resist

1. lateral loads

2. longitudinal loads and vertical loads

3. lateral, longitudinal and vertical loads

4. lateral and longitudinal loads

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19. 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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20. 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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21. Horizontal stiffener in a plate girder is provided to safe guard against

1. shear buckling of web plate

2. compression buckling of web plate

3. yielding

4. all of the above

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22. 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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23. 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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24. 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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25. 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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26. 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

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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. 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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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. An under-reinforced section means

1. Steel is provided at the underside only

2. Steel provided is insufficient

3. Steel provided on one face only

4. Steel will yield first

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

1. Stainless steel

2. TOR Steel

3. Mild steel3

4. High tension steel

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34. 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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35. 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

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36. 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

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37. 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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38. The centroid of compressive force, from the extreme compression fiber, in limit state design lies at a distance of ? (Where xu is the depth of natural axis at the limit state of collapse)

1. 0.367 xu

2. 0.416 xu

3. 0.446 xu

4. 0.573 xu

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39. 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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40. 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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41. Normally in a truss structure, tension occurs at/for?

1. Joints

2. Base

3. Bottom chords

4. Top chords

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42. 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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43. 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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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 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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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. 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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48. As per IS: 800, for compression flange, the out stand 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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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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