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Free download in PDF Design of Steel Structures Multiple Choice Questions with 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.
61
The centrifugal force due to curvature of track is assumed to act on the bridge at a height of
[A]
1.23 m above the rail level
[B]
1.50 m above the rail level
[C]
1.83 m above the rail level
[D]
2.13 m above the rail level
Answer: 1.83 m above the rail level
62
If the floor is supported at or near the bottom but top chords of a bridge are not braced, then the bridge is called
[A]
deck type
[B]
through type
[C]
half through type
[D]
double deck type
Answer: half through type
63
If the loaded length of span in meters of a railway steel bridge carrying a single track is 6 m, then impact factor is taken as
[A]
0
[B]
0.5
[C]
between 0.5 and 1.0
[D]
1.0
Answer: between 0.5 and 1.0
64
Hudson’s formula gives the dead weight of a truss bridge as a function of
[A]
bottom chord area
[B]
top chord area
[C]
effective span of bridge
[D]
heaviest axle load of engine
Answer: bottom chord area
65
The diameter of base of conical flare of a steel stack is
where d is the diameter of the cylindrical part
[A]
less than d
[B]
equal to d
[C]
more than d
[D]
any of the above
66
The minimum thickness of plates in a steel stack should be
[A]
4 mm
[B]
5 mm
[C]
6 mm
[D]
8 mm
67
The bracing between two columns of a steel tank will be designed to resist
[A]
horizontal shear due to wind or earthquake only
[B]
horizontal, shear due to wind or earthquake + 2.5% of column loads
[C]
column loads + 2.5% of horizontal shear due to wind or earthquake
[D]
column loads + full horizontal shear due to wind or earthquake
Answer: horizontal, shear due to wind or earthquake + 2.5% of column loads
68
The capacity of the smallest pressed steel tank is
[A]
1000 litre
[B]
1650 litre
[C]
1950 litre
[D]
2450 litre
69
Which of the following sections should preferably be used at places where torsion occurs ?
[A]
angle section
[B]
channel section
[C]
box type section
[D]
any of the above
70
Steel tanks are mainly designed for
[A]
weight of tank
[B]
wind pressure
[C]
water pressure
[D]
earthquake forces
71
The allowable tensile stress in structural mild steel plates for steel tank is assumed as
[A]
95.0 MPa on net area
[B]
105.5 MPa on net area
[C]
105.5 MPa on gross area
[D]
150.0 MPa on gross area
Answer: 105.5 MPa on net area
72
Minimum pitch provided in riveted steel tanks is
where d is diameter of rivets
[A]
1.5 d
[B]
2.0 d
[C]
2.5 d
[D]
3.0 d
73
The number of seismic zones in which the country has been divided are
74
As per IS : 875, for the purposes of specifying basic wind velocity, the country has been divided into
[A]
4 zones
[B]
5 zones
[C]
6 zones
[D]
7 zones
75
Area of openings for buildings of large permeability is more than
[A]
10% of wall area
[B]
20% of wall area
[C]
30% of wall area
[D]
50% of wall area
76
The external wind pressure acting on a roof depends on
[A]
degree of permeability of roof
[B]
slope of roof
[C]
both (a) and (b)
[D]
none of the above
77
The risk coefficient k, depends on
[A]
mean probable design life of structures
[B]
basic wind speed
[C]
both (a) and (b)
[D]
none of the above
78
The basic wind speed is specified at a height ‘h’ above mean ground level in an open terrain. The value of’h’ is
[A]
10 m
[B]
20 m
[C]
25 m
[D]
50 m
79
The portal bracing in a truss bridge is used to
[A]
transfer load from top of end posts to bearings
[B]
keep the rectangular shape of the bridge cross-section
[C]
stiffen the structure laterally
[D]
prevent the sidesway buckling of top chord
Answer: transfer load from top of end posts to bearings
80
The sway bracing is designed to transfer
[A]
2Vi % of the top panel wind load to bottom bracing
[B]
10% of the top panel wind load to bottom bracing
[C]
25% of the top panel wind load to bottom bracing
[D]
50% of the top panel wind load to bottom bracing
Answer: 50% of the top panel wind load to bottom bracing
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