What is the primary purpose of a plate girder in steel structures?
A Resist torsion
B Support light loads
C Span long distances
D Span short distances
Plate girders are used to span long distances in steel structures. They are built by welding or bolting steel plates to form an I-section, providing high strength and stiffness for bridges and industrial buildings.
Which of the following is a common type of welded joint?
A Butt joint
B Lap joint
C Pin joint
D Cleat joint
A butt joint is a common type of welded joint where two pieces of steel are joined end-to-end. It is widely used in steel structures for its simplicity and ability to transfer loads efficiently.
What is the main advantage of using cold-formed steel sections?
A Low strength
B High cost
C Difficult fabrication
D Lightweight
Cold-formed steel sections are lightweight and easy to fabricate, making them ideal for applications like purlins, wall studs, and lightweight framing in buildings.
Which of the following is a key property of structural steel?
A Low ductility
B High strength-to-weight ratio
C Low elasticity
D High brittleness
Structural steel has a high strength-to-weight ratio, making it ideal for constructing large and tall structures without excessive weight. It also offers good ductility and elasticity.
What is the primary purpose of a roof truss?
A Support roof loads
B Support floor loads
C Resist seismic loads
D Resist wind loads
Roof trusses are designed to support roof loads and transfer them to the supporting walls or columns. They are lightweight and efficient for spanning large distances.
Which of the following is a common type of bolted connection?
A Adhesive connection
B Welded connection
C Bearing-type connection
D Riveted connection
A bearing-type bolted connection relies on the shear strength of bolts to transfer loads. It is commonly used in steel structures due to its ease of assembly and disassembly.
What is the primary cause of lateral torsional buckling in beams?
A Axial compression
B Bending moments
C Torsional forces
D Shear forces
Lateral torsional buckling occurs in beams due to bending moments, causing the beam to twist and bend simultaneously. It is a critical failure mode in long, slender beams.
Which of the following is a common method to prevent corrosion in steel structures?
A Painting
B Riveting
C Welding
D Bolting
Painting is a common method to prevent corrosion in steel structures. Protective coatings like paint or galvanizing create a barrier between the steel and the environment, preventing rust.
What is the primary purpose of a gantry girder?
A Support floor loads
B Support roof loads
C Support wind loads
D Support crane loads
Gantry girders are designed to support crane loads in industrial buildings. They are subjected to heavy vertical and horizontal forces due to crane movement.
Which of the following is a common type of built-up section?
A I-section
B Box section
C Angle section
D Channel section
A box section is a built-up section formed by welding or bolting multiple steel plates together. It is used when standard rolled sections are insufficient for design requirements.
What is the primary purpose of fireproofing in steel structures?
A Increase load capacity
B Prevent corrosion
C Improve fire resistance
D Enhance aesthetics
Fireproofing improves the fire resistance of steel structures by protecting the steel from high temperatures. Materials like intumescent coatings or concrete encasement are used to maintain structural integrity during a fire.
Which of the following is a common type of tension member?
A Tie rod
B Plate girder
C Column
D Beam
A tie rod is a common type of tension member used to resist axial tensile forces. It is often used in trusses and bridges to maintain structural stability.
What is the primary purpose of fatigue analysis in steel structures?
A Assess static load capacity
B Evaluate dynamic load effects
C Measure corrosion rate
D Determine fire resistance
Fatigue analysis evaluates the effects of repeated or fluctuating loads on steel structures. It helps predict the lifespan of components subjected to cyclic loading, such as bridges and crane girders.
Which of the following is a common type of steel coating?
A Plastic
B Concrete
C Paint
D Wood
Paint is a common type of steel coating used to protect steel from corrosion. It creates a barrier between the steel and the environment, preventing moisture and oxygen from causing rust.
What is the primary purpose of prestressed steel?
A Improve load-carrying capacity
B Increase ductility
C Enhance aesthetics
D Reduce weight
Prestressed steel is used to improve the load-carrying capacity of structures by introducing internal stresses that counteract external loads. This technique is commonly used in bridges and long-span structures.