Design of Steel Structure Mcqs

Practice Quiz On Design of Steel Structure Mcqs

30 Marks

1 / 30

The range of economical spacing of trusses varies from

L/3 to L/5

L/4 to 2L/5

L/3 to L/2

2L/5 to 3L/5

2 / 30

Angle of inclination of the lacing bar with the longitudinal axis of the column should preferably be between

10° to 30°

30° to 40°

40° to 70°

90°

3 / 30

The minimum thickness of a steel plate, which is directly exposed to weather and is not accessible for cleaning and repainting, should be:

4.5 mm

6 mm

8 mm

10 mm

4 / 30

The ratio of plastic section modulus to elastic section modulus

Is equal to 1

Is always less than 1

Is always greater than 1

Can be less than 1

5 / 30

In rolled steel beams, shear force is mostly resisted by

Web only

Flanges only

Web and flanges together

None of these

6 / 30

The beams supporting the steps of a stair are generally known as

Headers

Trimmers

Stringers

Spandrel beams

7 / 30

The maximum spacing of vertical stiffeners is

1.33 d

1.25 d

1.5 d

1.75 d

8 / 30

Load factor is

Always equal to factor of safety

Always less than factor of safety

Always greater than factor of safety

Sometimes greater than factor of safety

9 / 30

Horizontal stiffener in a plate girder is provided to safeguard against

Shear buckling of web plate

Compression buckling of web plate

Yielding

All of the above

10 / 30

The effective length of a battened column is increased by

5 %

10 %

15 %

20 %

11 / 30

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

Stringer beam

Lintel beam

Spandrel beam

Header beam

12 / 30

Intermediate vertical stiffeners in a plate girder need be provided if the depth of web exceeds

50 t

85 t

200 t

250 t

13 / 30

As per IS code, the maximum pitch of rivets in compression flange (thickness ‘t’) of a built up beam is

Lesser of 200 mm and 12t

Lesser of 250 mm and 12t

Lesser of 200 mm and 16t

Lesser of 250 mm and 16t

14 / 30

The moment-curvature relation at a plastic hinge is

Linear

Parabolic

Constant moment for all curvatures

Constant curvature for all moments

15 / 30

A tension member, if subjected to possible reversal of stress due to wind, the slenderness ratio of the member should not exceed

180

200

300

350

16 / 30

The deflection of beams may be decreased by

Decreasing the depth of beam

Increasing the depth of beam

Increasing the span

Increasing the width of beam

17 / 30

The maximum permissible slenderness ratio of compression member carrying dead and superimposed load, is

180

200

250

350

18 / 30

The forces acting on the web splice of a plate girder are

Axial forces

Shear and axial forces

Shear and bending forces

Axial and bending forces

19 / 30

When the axis of load lies in the plane of rivet group, then the rivets are subjected to

Only shear stresses

Only tensile stresses

Both (A) and (B)

None of the above

20 / 30

Length of an outstanding leg of a vertical stiffener, may be taken equal to

1/10th of clear depth of the girder plus 15 mm

1/20th of clear depth of the girder plus 20 mm

1/25th of clear depth of the girder plus 25 mm

1/30th of clear depth of the girder plus 50 mm

21 / 30

The cross-section of a standard fillet is a triangle whose base angles are

20° and 70°

30° and 60°

45° and 45°

40° and 50°

22 / 30

Bending compressive and tensile stresses respectively are calculated based on

Net area and gross area

Gross area and net area

Net area in both cases

Gross area in both cases

23 / 30

The effective length of a fillet weld should not be less than

Two times the weld size

Four times the weld size

Six times the weld size

Weld size

24 / 30

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

1.0 mm

1.5 mm

2.0 mm

2.5 mm

25 / 30

The best arrangement to provide unified behaviour in built up steel columns is by

Lacing

Battening

Tie plates

Perforated cover plates

26 / 30

Poisson's ratio for steel within elastic limit, ranges from

0.15 to 0.20

0.20 to 0.24

0.25 to 0.33

0.33 to 0.35

27 / 30

According to I.S. : 800 – 1871, lacing bars resist transverse shear equal to

1.0% of the axial load

2.0% of the axial load

2.5% of the axial load

3.0% of the axial load

28 / 30

Pitch of tacking rivets, when double angles connected back to back and acting as tension members should not be more than

500 mm

600 mm

1000 mm

300 mm

29 / 30

Bearing stiffener in a plate girder is used to

Transfer the load from the top flange to the bottom one

Prevent buckling of web

Decrease the effective depth of web

Prevent excessive deflection

30 / 30

The minimum pitch of rivet holes of diameter d should not be less than

1.25 d

1.5 d

2.5 d

Your score is

According to I.S. : 800 – 1871, lacing bars resist transverse shear equal to

A) 1.0% of the axial load

B) 2.0% of the axial load

C) 2.5% of the axial load

D) 3.0% of the axial load

C) 2.5% of the axial load

When the axis of load lies in the plane of rivet group, then the rivets are subjected to

A) Only shear stresses

B) Only tensile stresses

C) Both (A) and (B)

D) None of the above

A) Only shear stresses

The ratio of plastic section modulus to elastic section modulus

A) Is equal to 1

B) Is always less than 1

C) Is always greater than 1

D) Can be less than 1

C) Is always greater than 1

The forces acting on the web splice of a plate girder are

A) Axial forces

B) Shear and axial forces

C) Shear and bending forces

D) Axial and bending forces

C) Shear and bending forces

The minimum thickness of a steel plate, which is directly exposed to weather and is not accessible for cleaning and repainting, should be:

A) 4.5 mm

B) 6 mm

C) 8 mm

D) 10 mm

C) 8 mm

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

A) Stringer beam

B) Lintel beam

C) Spandrel beam

D) Header beam

C) Spandrel beam

A tension member, if subjected to possible reversal of stress due to wind, the slenderness ratio of the member should not exceed

A) 180

B) 200

C) 300

D) 350

As per IS code, the maximum pitch of rivets in compression flange (thickness ‘t’) of a built up beam is

A) Lesser of 200 mm and 12t

B) Lesser of 250 mm and 12t

C) Lesser of 200 mm and 16t

D) Lesser of 250 mm and 16t

A) Lesser of 200 mm and 12t

Angle of inclination of the lacing bar with the longitudinal axis of the column should preferably be between

A) 10° to 30°

B) 30° to 40°

C) 40° to 70°

D) 90°

C) 40° to 70°

Bearing stiffener in a plate girder is used to

A) Transfer the load from the top flange to the bottom one

B) Prevent buckling of web

C) Decrease the effective depth of web

D) Prevent excessive deflection

B) Prevent buckling of web

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