Civil Design of Steel Structure Part-4

Test Preparation on Civil Design of Steel Structure Part-4

1.

The equivalent axial tensile load Pe, which produces an average axial tensile stress in the section equivalent to the combined stress due to axial tension P and bending M, at the extreme fiber of the section, is given by (where Z is the section modulus of the section).

1Pe = P + MA/Z
2Pe = P - MA/Z
3Pe = P - Z/MA
4Pe = P + Z/MA

2.

Live load

1Varies in magnitude
2Varies in position
3Is expressed as uniformly distributed load
4All the above

3.

The maximum permissible slenderness ratio of a member carrying loads resulting from wind is

1180
2200
3250
4300

4.

The average shear stress for rolled steel beam section is

1845 kg/cm2
2945 kg/cm2
31025 kg/cm2
41500 kg/cm2

5.

For a rectangular section, the ratio of the maximum and average shear stresses, is

11.5
22.0
32.5
43.5

6.

For the steel member exposed to weather and accessible for repainting, the thickness of steel should not be less than (accepting the webs of Indian Standard rolled steel joists and channels).

14 mm
26 mm
38 mm
410 mm

7.

The permissible stress in bending for rolled steel I-beams and channels, is

11500 kg/cm2
21575 kg/cm2
3945 kg/cm2
41650 kg/cm2

8.

The distance measured along one rivet line from the centre of a rivet to the centre of adjoining rivet on an adjacent parallel rivet line, is called

1Pitch of rivet
2Gauge distance of rivet
3Staggered pitch
4All the above

9.

The effective length of a simply supported beam with ends restrained against torsion, and also the ends of compression flange partially restrained against lateral bending, is given by

1L = span
2L = 0.85 span
3L = 0.75 span
4L = 0.7 span

10.

The permissible bearing stress in steel, is

11500 kg/cm2
21890 kg/cm2
32025 kg/cm2
42340 kg/cm2

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