50 MCQs on Steel Structures
Topic 1: Types of Steel Sections (10 MCQs)
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Which of the following is not a rolled steel section?
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(A) Angle section
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(B) Channel section
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(C) T-section
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(D) Cement block
✅ Answer: D
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An I-section is most efficient in:
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(A) Axial tension
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(B) Axial compression
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(C) Bending
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(D) Shear
✅ Answer: C
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The ISMB section stands for:
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(A) Indian Standard Metal Beam
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(B) Indian Standard Medium Beam
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(C) Indian Steel Metal Beam
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(D) Indian Standard I Beam
✅ Answer: B
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The most suitable steel section for a column is:
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(A) I-section
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(B) T-section
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(C) Hollow circular section
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(D) Channel section
✅ Answer: C
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Channels are typically used for:
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(A) Slabs
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(B) Girders
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(C) Trusses and bracings
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(D) Foundation
✅ Answer: C
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The effective length of a built-up column using two channel sections depends upon:
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(A) Load
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(B) Slenderness ratio
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(C) Distance between channels
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(D) Connection type
✅ Answer: C
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Which section is most preferred in trusses for members under tension?
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(A) Tubular section
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(B) Plate section
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(C) T-section
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(D) Channel section
✅ Answer: A
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Steel flats are mainly used for:
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(A) Beams
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(B) Columns
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(C) Bracing and ties
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(D) Floors
✅ Answer: C
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Which of the following is an unsymmetrical steel section?
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(A) Angle
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(B) I-section
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(C) Circular pipe
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(D) Box section
✅ Answer: A
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Box sections are more resistant to:
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(A) Tension
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(B) Buckling
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(C) Fatigue
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(D) Torsion
✅ Answer: D
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Topic 2: Riveted and Bolted Connections (10 MCQs)
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Rivets are mostly used in:
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(A) Temporary structures
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(B) Modern skyscrapers
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(C) Railway bridges
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(D) Underground pipelines
✅ Answer: C
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The failure of a riveted connection may occur by:
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(A) Shearing of rivet
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(B) Bearing failure
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(C) Tearing of plate
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(D) All of the above
✅ Answer: D
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Which bolt is tightened under tension using a torque wrench?
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(A) Friction bolt
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(B) Turned bolt
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(C) HSFG bolt
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(D) Anchor bolt
✅ Answer: C
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The strength of a riveted joint is least when:
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(A) Rivet is in single shear
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(B) Rivet is in double shear
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(C) Plate is in bearing
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(D) Rivet holes are oversized
✅ Answer: D
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Bolted connections are preferred over riveted ones due to:
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(A) Lower cost
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(B) Faster installation
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(C) Easy inspection and maintenance
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(D) All of the above
✅ Answer: D
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In bolted joints, slip-critical connections rely on:
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(A) Friction
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(B) Shear
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(C) Bearing
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(D) Bending
✅ Answer: A
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HSFG bolts are tightened to induce:
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(A) Bending
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(B) Shear
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(C) Tension
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(D) Fatigue
✅ Answer: C
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A gusset plate is used to:
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(A) Reduce buckling
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(B) Provide support
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(C) Connect multiple members
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(D) Strengthen beams
✅ Answer: C
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Bolted connections are designed based on:
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(A) Thread length
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(B) Bolt diameter
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(C) Shear and bearing
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(D) Compression force
✅ Answer: C
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The pitch of rivets is:
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(A) Distance between bolt and edge
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(B) Distance between centers of rivets
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(C) Diameter of rivet
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(D) Thickness of plate
✅ Answer: B
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Topic 3: Welded Connections (6 MCQs)
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Fillet welds are commonly used because:
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(A) Easy to inspect
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(B) Stronger than butt weld
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(C) No edge preparation required
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(D) All of the above
✅ Answer: C
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Throat thickness of a fillet weld is:
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(A) Hypotenuse of triangle
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(B) Vertical leg
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(C) Horizontal leg
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(D) Perpendicular from root to hypotenuse
✅ Answer: D
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Welded joints fail due to:
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(A) Cracking
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(B) Lack of fusion
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(C) Porosity
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(D) All of the above
✅ Answer: D
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The effective throat of a fillet weld is:
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(A) 0.5 × weld size
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(B) 0.7 × weld size
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(C) Equal to weld size
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(D) 1.5 × weld size
✅ Answer: B
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Which weld is strongest in axial tension?
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(A) Intermittent weld
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(B) Plug weld
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(C) Butt weld
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(D) Fillet weld
✅ Answer: C
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For shop welding, the preferred method is:
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(A) Gas welding
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(B) MIG welding
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(C) Manual arc welding
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(D) Submerged arc welding
✅ Answer: D
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Topic 4: Design of Tension and Compression Members (10 MCQs)
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The maximum stress in a tension member occurs at:
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(A) Center
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(B) At supports
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(C) Section with bolt holes
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(D) Section with welds
✅ Answer: C
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Net effective area in tension members is calculated by:
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(A) Gross area + Hole area
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(B) Gross area – Hole area
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(C) Gross area × Hole dia
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(D) Hole dia × Plate thickness
✅ Answer: B
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Which failure mode is critical for slender compression members?
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(A) Yielding
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(B) Shear
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(C) Local buckling
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(D) Elastic buckling
✅ Answer: D
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Slenderness ratio is defined as:
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(A) L/D
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(B) L/r
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(C) A/P
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(D) D/t
✅ Answer: B
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Euler’s formula is valid for:
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(A) Long columns
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(B) Short columns
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(C) All columns
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(D) Stub columns
✅ Answer: A
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Minimum thickness for tension member to avoid corrosion is:
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(A) 4 mm
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(B) 5 mm
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(C) 6 mm
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(D) 10 mm
✅ Answer: C
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The value of slenderness ratio for steel compression members should be less than:
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(A) 80
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(B) 120
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(C) 180
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(D) 250
✅ Answer: D
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Compression members are also known as:
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(A) Stiffeners
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(B) Braces
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(C) Struts
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(D) Webs
✅ Answer: C
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Angle sections are usually used for:
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(A) Beams
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(B) Columns
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(C) Bracing members
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(D) Footings
✅ Answer: C
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Tension members in trusses are generally designed for:
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(A) Yield strength
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(B) Buckling
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(C) Plastic failure
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(D) Compression
✅ Answer: A
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Topic 5: Design of Beams and Columns (8 MCQs)
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Beams are primarily designed for:
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(A) Axial load
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(B) Bending
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(C) Torsion
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(D) Tension
✅ Answer: B
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Shear force in steel beams is resisted mainly by:
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(A) Flange
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(B) Web
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(C) Entire cross-section
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(D) Plate stiffeners
✅ Answer: B
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Lateral torsional buckling in beams occurs due to:
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(A) High axial force
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(B) Lack of lateral restraint
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(C) Improper support
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(D) Torsional inertia
✅ Answer: B
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Columns subjected to axial loads are:
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(A) Subject to tension
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(B) Always fail by yielding
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(C) Subject to buckling
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(D) Not affected by load length
✅ Answer: C
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Effective length of a column depends on:
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(A) Diameter
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(B) Slenderness ratio
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(C) End conditions
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(D) Load applied
✅ Answer: C
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Beam depth is increased to resist:
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(A) Axial force
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(B) Bending moment
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(C) Shear
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(D) Lateral torsion
✅ Answer: B
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Web stiffeners in beams are provided to resist:
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(A) Axial load
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(B) Shear buckling
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(C) Lateral torsion
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(D) Flexure
✅ Answer: B
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A compound column is made by:
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(A) Welding two channels
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(B) Bolting flats
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(C) Combining sections to increase strength
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(D) Using composite materials
✅ Answer: C
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Topic 6: Basic Concepts of Plastic Design (6 MCQs)
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Plastic design assumes:
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(A) Material yields at ultimate load
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(B) Linear behavior
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(C) Elastic stress distribution
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(D) Constant strain
✅ Answer: A
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Plastic hinge is formed when:
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(A) Structure starts yielding
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(B) Structure cracks
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(C) Section reaches plastic moment
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(D) Load is removed
✅ Answer: C
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Shape factor for a rectangular section is:
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(A) 1
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(B) 1.2
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(C) 1.5
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(D) 2
✅ Answer: C
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Plastic moment is:
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(A) Less than elastic moment
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(B) Greater than elastic moment
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(C) Equal to elastic moment
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(D) Independent of material
✅ Answer: B
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Collapse load in plastic design is determined by:
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(A) Stiffness
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(B) Number of supports
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(C) Plastic hinges
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(D) Elastic modulus
✅ Answer: C
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A structure becomes a mechanism when:
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(A) 1 plastic hinge forms
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(B) Load increases
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(C) Number of hinges = Degrees of freedom
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(D) It vibrates
✅ Answer: C
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