FAQ’s for Structural Design Jobs

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1. A steel beam supporting loads from the floor slab as well as from wall is termed as

1. stringer beam

2. lintel beam

3. spandrel beam

4. header beam

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

1. displacement

2. load

3. slope

4. moment

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6. 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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7. 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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8. 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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9. 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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10. 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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11. 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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12. 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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13. 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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14. 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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15. 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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16. 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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17. The slenderness ratio of a column supported throughout its length by a masonry wall is

1. zero

2. 10

3. 100

4. infinity

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18. A circular column section is generally not used in actual practice because

1. it is uneconomical

2. it cannot carry the load safely

3. it is difficult to connect beams to the round sections

4. all of the above

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19. The actual thickness of butt weld as compared to the thickness of plate is usually

1. more

2. less

3. equal

4. none of the above

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20. For a standard 45° fillet, the ratio of size of fillet to throat thickness is

1. 0.042361111

2. 1 : V2

3. V2 : 1

4. 0.084027778

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21. 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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22. 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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23. 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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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. 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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27. 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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28. Effective depth and depth of the neutral axis respectively of a singly reinforced?

1. d

2. n

3. d+n/3

4. d-n/3

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29. 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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30. 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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31. 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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32. On a circular slab of radius, the maximum radial moment at the center if the load on the slab in wkn/m2

1. WR2/16

2. 2WR2/16

3. 3WR2/16

4. 5WR2/16

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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 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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36. 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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37. 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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38. 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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39. A single rolling load of 8 kN rolls alone a girder of 15 m span. the absolute maximum bending moment will be

1. 8 kN.m

2. 15 kN.m

3. 30 kN.m

4. 60 kN.m

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40. 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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41. 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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42. 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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43. 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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44. 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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45. 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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46. Shell structure does not have any?

1. Bending moment

2. Shear stress

3. Tensile stress

4. Compressive stress

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

1. Joints

2. Base

3. Bottom chords

4. Top chords

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48. 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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49. 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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50. 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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