Free Model Online Design of Steel Structures test2

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1. The best arrangement to provide unified behaviour in built up steel columns is by ______.
lacing	battening
tie plates	perforated cover plates

2. If the 20 mm rivets are used in lacing bars, then the minimum width of lacing bar should be ______.
40mm	60mm
80mm	100mm

3. The use of tie plates in laced columns is _____.
prohibited	not prohibited
permitted at start and end of lacing system only	permitted between two parts of the lacing

4. Lacing bars in a steel column should be designed to resist _______.
bending moment due to 2.5% of the column load	shear force due to 2.5% of the column load
2.5% of the column load	both (a) and (b)

5. 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°

6. The effective length of a battened column is increased by _______.
5%	10%
15%	20%

7. The overlap of batten plates with the main members in welded connections should be more than ______.
3t	4t
6t	8t

8. The slenderness ratio of lacing bars should not exceed ______.
100	120
145	180

9. Economical depth of a plate girder corresponds to ______.
minimum weight	minimum depth
maximum weight	minimum thickness of web

10. Shear buckling of web in a plate girder is prevented by using _______.
vertical intermediate stiffener	horizontal stiffener at neutral axis
bearing stiffener	none of the above

11. 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

12. Minimum thickness of web in a plate girder, when the plate is accessible and also exposed to weather, is _____.
5 mm	6 mm
8 mm	10 mm

13. The web crippling due to excessive bearing stress can be avoided by ______.
increasing the web thickness	providing suitable stiffeners
increasing the length of the bearing plates	none of the above

14. As per IS : 800, for compression flange, the outstand of flange plates should not exceed
121	161
201	251

15. Intermediate vertical stiffeners in a plate girder need be provided if the depth of web exceeds ______.
501	851
200t	2501

16. 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

17. 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

18. Gantry girders are designed to resist _______.
lateral loads	longitudinal loads and vertical loads
lateral, longitudinal and vertical loads	lateral and longitudinal loads

19. Minimum spacing of vertical stiffeners is limited to ______.
d/4	d/3
d/2	2d/3

20. Rivets connecting flange angles to cover plates in a plate girder are subjected to ______.
horizontal shear only	vertical load only
both (a) and (b)	none of the above