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Free download in PDF Design of Steel Structures MCQs 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.
81
The allowable shear stress in the web of mild steel beams decreases with
where ‘h’ is height and t is thickness
[A]
decrease in h/t ratio
[B]
increase in h/t ratio
[C]
decrease in thickness
[D]
increase in height
Answer: increase in h/t ratio
82
In moment resistant connections, the moment resistance of riveted connection depends upon
[A]
shear in rivets
[B]
compression in rivets
[C]
tension in rivets
[D]
strength of rivets in bearing
Answer: tension in rivets
83
Pitch of tacking rivets, when double angles connected back to back and acting as tension members should not be more than
[A]
500 mm
[B]
600 mm
[C]
1000 mm
[D]
300 mm
84
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
85
For rivets in tension with counter-sunk heads, the tensile value shall be
[A]
reduced by 25 %
[B]
reduced by 33.3%
[C]
increased by 25 %
[D]
increased by 33.3 %
86
Lug angles
[A]
are used to reduce the length of connection.
[B]
are unequal angles.
[C]
increases shear lag.
[D]
all the above
Answer: are used to reduce the length of connection
87
The connection of intermediate vertical stiffeners to the web, not subjected to external loads, shall be designed for a minimum shear force (kN/m) of
where, t = the web thickness in mm
h = the outstand of stiffener in mm
[A]
75 t2/h
[B]
125 t3/h2
[C]
125 t2/h
[D]
175 t2/h
88
The moment of inertia of the pair of vertical stiffeners about the center line of the web should not be less than.
where, ‘t’ is the minimum required thick-ness of the web and ‘C is the maximum permitted clear distance between vertical stiffener for thickness ‘t’.
[A]
1.5dV/C
[B]
1.5d¥/C
[C]
1.5d¥/C2
[D]
1.5dY/C3
89
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
90
In case of plastic design, the calculated maximum shear capacity of a beam as per IS:800 shall be
where, Aw = effective cross-sectional area resisting shear fy = yield stress of the steel
[A]
0.55 Awfy
[B]
0.65 Awfy
[C]
0.75 Awfy
[D]
0.85 Awfy
91
The shape factor of an isosceles triangle for bending about the axis parallel to the base is:
[A]
1.5
[B]
1.7
[C]
2.0
[D]
2.34
92
In the virtual work method, the virtual quantity is
[A]
displacement
[B]
load
[C]
slope
[D]
moment
93
Which of the following conditions is to be satisfied both in elastic and plastic analysis ?
[A]
equilibrium condition
[B]
yield condition
[C]
plastic moment condition
[D]
mechanism condition
Answer: equilibrium condition
94
Other conditions being same, the load factor in indeterminate structures is
[A]
equal to load factor in determinate structures
[B]
more than the load factor in determinate structures
[C]
less than the load factor in determinate structures
[D]
unpredictable
Answer: more than the load factor in determinate structures
95
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
Answer: is always greater than 1
96
Load factor is
[A]
always equal to factor of safety
[B]
always less than factor of safety
[C]
always greater than factor of safety
[D]
sometimes greater than factor of safety
Answer: always greater than factor of safety
97
The mechanism method of plastic analysis satisfies
[A]
equilibrium and mechanism conditions
[B]
equilibrium and plastic moment conditions
[C]
mechanism and plastic moment conditions
[D]
equilibrium condition only
Answer: equilibrium and mechanism conditions
98
The statical method of plastic analysis satisfies
[A]
equilibrium and mechanism conditions
[B]
equilibrium and plastic moment conditions
[C]
mechanism and plastic moment conditions
[D]
equilibrium condition only
Answer: equilibrium and plastic moment conditions
99
Shape factor is a property which depends
[A]
only on the ultimate stress of the material
[B]
only on the yield stress of the material
[C]
only on the geometry of the section
[D]
both on the yield stress and ultimate stress of material
Answer: only on the geometry of the section
100
The moment-curvature relation at a plastic hinge is
[A]
linear
[B]
parabolic
[C]
constant moment for all curvatures
[D]
constant curvature for all moments
Answer: constant moment for all curvatures
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