Steel Design Test 1

Question 1
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For the structural member exposed to weathering but not accessible for painting is required to be connected to other member using rivet connection, then the minimum diameter of rivet required to ensure safety of the structure as per IS 800:1984 is ______

A
14 mm

B
16 mm

C
18 mm

D
20 mm

Question 2
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A fillet weld is used to connect two plates of the square edge of thickness 8 mm and 12 mm. The welded surface meets at an angle of 100^°. What would be the minimum and maximum possible throat thickness of welded connection respectively as per the codal provisions of IS 800:2007?

A
3.25 mm and 6.825 mm respectively

B
5 mm and 6.825 mm respectively

C
3.25 mm and 4.225 mm respectively

D
5 mm and 4.225 mm respectively

Question 3
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According to IS: 875 Part 3, the design wind speed acting on industrial roof is estimated based on the basic wind speed by multiplying it by factors K1, K2 and K3, where K1 is called:

A
Terrain height factor

B
Structure size factor

C
Topography factor

D
Risk coefficient

Question 4
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For a rectangular cross-section, when the extreme fibre strain was ε_y, the yield moment capacity is M_y. What would be the value of the resisting moment when the extreme fibre strain is 2ε_y?

A
1.000 M_y

B
1.250 M_y

C
1.375 M_y

D
1.550 M_y

Question 5
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Which of the following is true in reference to the ‘plastic sections’ defined in IS 800:2007?

A
It can develop a plastic hinge and collapse mechanism.

B
It can develop a plastic hinge but cannot develop a collapse mechanism.

C
It may fail before reaching yielding.

D
It can develop the yield moment only.

Question 6
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A lug angle connection is made with ISA 90 × 90 × 10 mm of Fe 410 with a longer leg connected to the gusset plate with 18 mm diameter rivets. Calculate the tensile load capacity of the tie due to yielding of Gross-section. (α = 0.8)

A
255 kN

B
333.75 kN

C
386.36 kN

D
388.25 kN

Question 7
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A column section ISHB 350 @ 661.2 N/m carries a factored axial compressive load of 2000 kN and factored bending moment of 100 kN-m the thickness of the base plate is 30 mm. Calculate moment capacity of the base plate for 410-grade steel?

A
25.63 kNmm

B
35.65 kNmm

C
40.91 kNmm

D
49.2 kNmm

Question 8
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Which of the following statement are incorrect regarding arrangements of battens as per IS 800: 2007?
For a battened compression member:
i) The spacing of battens shall be such that the slenderness ratio of any component should be less than 50.
ii) The thickness of the batten plates shall be less than one of the distance between the rivets.
iii) The effective depth of any batten shall not be less than twice the width of one member.
iv) The effective slenderness ratio of the battened column shall be taken as 1.5 times the actual slenderness ratio.

A
i, ii and iii only

B
ii, iii and iv only

C
i, iii, and iv only

D
i, ii, ii, and iv only

Question 9
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The difference between gross diameter and nominal diameter for the rivets up to 25 mm diameter is

A
1.0 mm

B
1.5 mm

C
2.0 mm

D
2.5 mm

Question 10
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If the thickness of plate to be connected by a rivet is 16 mm, then suitable size of rivet as per Unwin’s formula will be

A
16 mm

B
20 mm

C
24 mm

D
27 mm

Question 11
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According to IS Specifications, the maximum pitch of rivets in compression is (where t is thickness of thinnest outside plate or angle)

A
lesser of 200 mm and 12 t

B
lesser of 200 mm and 16 t

C
lesser of 300 mm and 32 t

D
lesser of 300 mm and 24 t

Question 12
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Buckling of the compression flange of a girder, without transverse stiffeners, can be avoided if (with standard notations)

A
\(\frac{d}{{{t}_{w}}}\le 345\epsilon _{f}^{2}\)

B
\(\frac{d}{{{t}_{w}}}\le 270\epsilon _{f}^{2}\)

C
\(\frac{d}{{{t}_{w}}}\le 345{{\epsilon }_{w}}\)

D
\(\frac{d}{{{t}_{w}}}\le 250{{\epsilon }_{w}}\)

Question 13
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Load on connection is not eccentric for

A
lap joint

B
single cover butt joint

C
double cover butt joint :

D
all the joints mentioned in (a), (b) and (c) of the question

Question 14
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ISMB 200 has been used as a column of the unsupported length of 15 m in an industrial building as pure compression member with the radius of gyration about the major axis is 50 mm and about the minor axis is 20 mm. Along the minor axis, the column has fixed against rotation and translation at both ends and along the major axis, the column is restrained in position but no in direction at both ends. Which of the following is correct keeping in view of the codal provisions of IS 800:2007 about buckling?

A
Buckling may occur about the major axis

B
Buckling may occur about the minor axis.

C
Buckling may occur either major axis or minor axis.

D
Buckling neither occurs about major axis nor minor axis.

Question 15
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In a design of beam columns, the values of plastic section ratio β_b = 1, the plastic sectional modulus Z_pz= 3948812 mm³, the yield stress fy = 250 N/mm² and critical moment of M_cr = 16866 × 10⁶ N.mm. The non-dimensional lateral torsional slenderness ratio will be nearly

A
0.141

B
0.242

C
0.323

D
0.424

Question 16
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The centre to centre maximum distance between bolts in tension member of thickness 10 mm is

A
200 mm

B
160 mm

C
120 mm

D
100 mm

Question 17
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The type of stress induced in the foundation bolts fixing a column to its footing is

A
pure compression

B
bearing

C
pure tension

D
bending

Question 18
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What is the safe load P that can be transmitted by the fillet-welded joint shown in the figure below if the safe allowable shear stress in the fillet weld is 108 MPa?

A
60 kN

B
66 kN

C
77 kN

D
81 kN

Question 19
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A 6 mm thick mild steel plate is connected to an 8 mm thick plate by 16 mm diameter shop rivets. What is-the number of rivets required to carry an 80 kN load?

A
2

B
3

C
4

D
6

Question 20
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Calculate the bending strength of ISLB 350 @ 486 N/m which is classified as a plastic section. Considering the beam to be laterally supported. The unsupported length of simply supported beam is 3 m. Z_pz = 851.11 × 10³ mm³ and Z_ez = 751.9 × 10³ mm³, r_y = 31.7 mm and γ_mo = 1.1.

A
186.82 kNm

B
175.86 kNm

C
193.43 kNm

D
205.36 kNm

Question 21
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What is the permissible tensile stress in bolts used for column bases (fy is the yield stress of the steel)?

A
20N/mm²

B
150N/mm²

C
0.6f_y

D
0.4f_y

Question 22
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A plate girder is designed to resist the maximum bending moment of 12000 kNm. The slenderness ratio for the section is 180 and grade of steel to be used is Fe250. The gross-sectional area of the beam (A) is given, by the relationship:
\({\rm{A}} = \frac{{2{{\rm{M}}_{\rm{z}}}}}{{{\rm{d}}{{\rm{f}}_{\rm{y}}}}} + \frac{{{{\rm{d}}^2}}}{{\rm{k}}}\)
Where,
M_z = Maximum bending moment, f_y= Design strength of flanges, b_f = width of the flange, and d = depth of web/circle. Calculate the economical depth of girder (in meters, rounded up to one decimal places)

A
1.90-2.10

B
1.904-2.101

C
1.907-2.106

D
1.909-2.102

Question 23
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Economical depth of a plate girder is given by where M is maximum moment in the plate girder, σ_tw is allowable bending stress and t_w is thickness of web

A

B

C

D

Question 24
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Minimum spacing of vertical stiffeners is limited to where d is the distance between flange angles.

A
d/4

B
d/3

C
d/2

D
2d/3

Question 25
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Which one of the following is correct?

An intermediate vertical stiffener connected to the web is designed to withstand a shearing force of not less than where t is web thickness in mm and h is the outstand of stiffener in mm.

A
100t/h

B
150t²/h

C
125h/t²

D
125t²/h

Submit Test

Steel Design Te...

Question 1

14 mm

16 mm

18 mm

20 mm

Question 2

3.25 mm and 6.825 mm respectively

5 mm and 6.825 mm respectively

3.25 mm and 4.225 mm respectively

5 mm and 4.225 mm respectively

Question 3

Terrain height factor

Structure size factor

Topography factor

Risk coefficient

Question 4

1.000 My

1.250 My

1.375 My

1.550 My

Question 5

It can develop a plastic hinge and collapse mechanism.

It can develop a plastic hinge but cannot develop a collapse mechanism.

It may fail before reaching yielding.

It can develop the yield moment only.

Question 6

255 kN

333.75 kN

386.36 kN

388.25 kN

Question 7

25.63 kNmm

35.65 kNmm

40.91 kNmm

49.2 kNmm

Question 8

i, ii and iii only

ii, iii and iv only

i, iii, and iv only

i, ii, ii, and iv only

Question 9

1.0 mm

1.5 mm

2.0 mm

2.5 mm

Question 10

16 mm

20 mm

24 mm

27 mm

Question 11

lesser of 200 mm and 12 t

lesser of 200 mm and 16 t

lesser of 300 mm and 32 t

lesser of 300 mm and 24 t

Question 12

\(\frac{d}{{{t}_{w}}}\le 345\epsilon _{f}^{2}\)

\(\frac{d}{{{t}_{w}}}\le 270\epsilon _{f}^{2}\)

\(\frac{d}{{{t}_{w}}}\le 345{{\epsilon }_{w}}\)

\(\frac{d}{{{t}_{w}}}\le 250{{\epsilon }_{w}}\)

Question 13

lap joint

single cover butt joint

double cover butt joint :

all the joints mentioned in (a), (b) and (c) of the question

Question 14

Buckling may occur about the major axis

Buckling may occur about the minor axis.

Buckling may occur either major axis or minor axis.

Buckling neither occurs about major axis nor minor axis.

Question 15

0.141

0.242

0.323

0.424

Question 16

200 mm

160 mm

120 mm

1.000 M_y

1.250 M_y

1.375 M_y

1.550 M_y

20N/mm²

150N/mm²

0.6f_y

0.4f_y

150t²/h

125h/t²

125t²/h