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Design Of Steel Structures
Quiz 3
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Q.1
If the floor is supported at or near the bottom but top chords of a bridge is not braced, then the bridge is called
Deck type
Through type
Half through type
Double deck type
Q.2
By providing sufficient edge distance, which of the following failures of riveted joint can be avoided ?
tension failure of the plate
shear failure of the rivet
shear failure of the plate
crushing failure of the rivet
Q.3
The maximum permissible span of asbestos cement sheets is
650 mm
810 mm
1250 mm
1680 mm
Q.4
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
Q.5
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
Q.6
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
Q.7
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
Q.8
Hudson’s formula gives the dead weight of a truss bridge as a function of
bottom chord area
top chord area
effective span of bridge
heaviest axle load of engine
Q.9
The number of seismic zones in which the country has been divided are
3
5
6
7
Q.10
Maximum pitch of rivets, used in steel stacks, is limited to (where t is thickness of thinner plate being connected)
6t
101
121
161
Q.11
Intermediate vertical stiffeners in a plate girder need be provided if the depth of web exceeds (where t is thickness of web)
50 t
85 t
200 t
250 t
Q.12
The mechanism method and the statical method give
lower and upper bounds respectively on the strength of structure
upper and lower bounds respectively on the strength of structure
lower bound on the strength of structure
upper bound on the strength of structure
Q.13
The range of economical spacing of trusses varies from
L/3 to L/5
L/4to2L/5
L/3 to L/2
2L/5 to 3L/5 where L is span
Q.14
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
Q.15
In moment resistant connections, the moment resistance of riveted connection depends upon
Shear in rivets
Compression in rivets
Tension in rivets
Strength of rivets in bearing
Q.16
According to IS:800, in the Merchant Rankine formula the value of imperfection index (n) is
1.0
1.4
1.8
2.0
Q.17
Generally the purlins are placed at the panel points so as to avoid
Axial force in rafter
Shear force in rafter
Deflection of rafter
Bending moment in rafter
Q.18
The maximum slenderness ratio of a steel column, the design of which is governed by wind or seismic forces is
150
180
250
350
Q.19
The slenderness ratio of lacing bars should not exceed
100
120
145
180
Q.20
In the virtual work method, the virtual quantity is
Displacement
Load
Slope
Moment
Q.21
Shape factor is a property which depends
only on the ultimate stress of the material
only on the yield stress of the material
only on the geometry of the section
both on the yield stress and ultimate stress of material
Q.22
The elastic strain for steel is about
1/12 of strain at the initiation of strain hardening and about 1/120 of maximum strain
1/2 of strain at the initiation of strain hardening and about 1/12 of maximum strain
1/12 of strain at the initiation of strain hardening and 1/200 of maximum strain
1/24 of strain at the initiation of strain hardening and about 1/200 of maximum strain
Q.23
In a gusseted base, when the end of the column is machined for complete bearing on the base plate, then the axial load is assumed to be transferred to base plate
Fully by direct bearing
Fully through fastenings
50% by direct bearing and 50% through fastenings
75% by direct bearing and 25% through fastenings
Q.24
Bolts are most suitable to carry
shear
bending
axial tension
shear and bending
Q.25
The least dimension in case of a circular column of diameter D is taken as
0.5 D
0.68 D
0.88 D
0.78 D
Q.26
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
16 mm
20 mm
24 mm
27 mm
Q.27
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
Q.28
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
Q.29
For a standard 45° fillet, the ratio of size of fillet to throat thickness is
1:1
1 : V2
V2 : 1
2: 1
Q.30
In the cross-section of a weld, throat is the
minimum dimension
average dimension
maximum dimension
none of the above
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