Design of Steel Structures Quiz | Design of Steel Structures MCQs and Answers

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Questions
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
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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

Answer: 1000 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

Answer: spandrel 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 %

Answer: reduced 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

Answer: 125 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

Answer: 1.5d¥/C2
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

Answer: 8 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

Answer: 0.55 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

Answer: 2.34
92 In the virtual work method, the virtual quantity is
A displacement
B load
C slope
D moment

Answer: displacement
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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