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Free download in PDF Design of Steel Structures Short Questions and Answers for competitive exams. These short objective type questions with answers are very important for competitive exams. These short solved questions or quizzes are provided by Gkseries.
41
The relation between intensity of wind pressure p and velocity of wind V is taken as
[A]
pa V
[B]
paV2
[C]
p a (1/V)
[D]
paV”2
42
For the buildings having a low permeability, the internal wind pressure acting normal to the wall and roof surfaces is taken as
where p is basic wind pressure
[A]
zero
[B]
±0.2p
[C]
± 0.5 p
[D]
±0.7p
43
Generally the purlins are placed at the panel points so as to avoid
[A]
axial force in rafter
[B]
shear force in rafter
[C]
deflection of rafter
[D]
bending moment in rafter
Answer: bending moment in rafter
44
To minimize the total cost of a roof truss, the ratio of the cost of truss to the cost of purlins shall be
45
Normally, the angle of roof truss with asbestos sheets should not be less than
[A]
26’/2°
[B]
30°
[C]
35°
[D]
40°
46
The maximum permissible span of asbestos cement sheets is
[A]
650 mm
[B]
810 mm
[C]
1250 mm
[D]
1680 mm
47
The range of economical spacing of trusses varies from
[A]
L/3 to L/5
[B]
L/4to2L/5
[C]
L/3 to L/2
[D]
2L/5 to 3L/5 where L is span
48
The maximum spacing of vertical stiffeners is
where d is the distance between flange angles
[A]
1.33 d
[B]
1.25 d
[C]
1.5 d
[D]
1.75 d
49
Rivets connecting flange angles to cover plates in a plate girder are subjected to
[A]
horizontal shear only
[B]
vertical load only
[C]
both (a) and (b)
[D]
None of these
Answer: horizontal shear only
50
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
51
Gantry girders are designed to resist
[A]
lateral loads
[B]
longitudinal loads and vertical loads
[C]
lateral, longitudinal and vertical loads
[D]
lateral and longitudinal loads
Answer: lateral, longitudinal and vertical loads
52
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
Answer: shear and bending forces
53
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
Answer: prevent buckling of web
54
Intermediate vertical stiffeners in a plate girder need be provided if the depth of web exceeds
where t is thickness of web
[A]
50 t
[B]
85 t
[C]
200 t
[D]
250 t
55
The web crippling due to excessive bearing stress can be avoided by
[A]
increasing the web thickness
[B]
providing suitable stiffeners
[C]
increasing the length of the bearing plates
[D]
none of the above
Answer: increasing the length of the bearing plates
56
Minimum thickness of web in a plate girder, when the plate is accessible and also exposed to weather, is
[A]
5 mm
[B]
6 mm
[C]
8 mm
[D]
10 mm
57
Horizontal stiffener in a plate girder is provided to safeguard against
[A]
shear buckling of web plate
[B]
compression buckling of web plate
[C]
yielding
[D]
all of the above
Answer: compression buckling of web plate
58
Shear buckling of web in a plate girder is prevented by using
[A]
vertical intermediate stiffener
[B]
horizontal stiffener at neutral axis
[C]
bearing stiffener
[D]
none of the above
Answer: vertical intermediate stiffener
59
The live load for a sloping roof with slope 15°, where access is not provided to roof, is taken as
[A]
0.65 kN/m2
[B]
0.75 kN/m2
[C]
1.35 kN/m2
[D]
1.50 kN/m2
60
The internal pressure coefficient on walls for buildings with large permeability is taken as
[A]
± 0.2
[B]
±0.5
[C]
± 0.7
[D]
0
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