What is the primary material used in the construction of steel structures?
A Concrete
B Aluminum
C Steel
D Wood
Steel is the primary material used in steel structures due to its high strength, durability, and ability to withstand heavy loads, making it ideal for large-scale constructions like buildings and bridges.
What is the main purpose of tension members in steel structures?
A Resist tensile forces
B Resist shear
C Resist bending
D Resist torsion
Tension members in steel structures are designed to resist tensile (pulling) forces. These include elements such as cables, tie rods, and braces in trusses and bridges, which carry loads that stretch the material.
What is a key characteristic of structural steel?
A Low strength
B High brittleness
C Low weight
D High ductility
Structural steel is known for its high ductility, which allows it to deform significantly before failure. This characteristic makes steel suitable for structures that need to absorb stresses, such as in buildings and bridges.
Which type of steel connection is most commonly used in modern steel frames?
A Screwed
B Bolted
C Riveted
D Glued
Bolted connections are most commonly used in modern steel frames due to their ease of assembly and disassembly. They are also strong enough to withstand the stresses in large structures like high‐rise buildings.
What type of steel is typically used in the construction of plate girders?
A Stainless steel
B High‐strength steel
C Alloy steel
D Mild steel
High‐strength steel is used in the construction of plate girders to provide the necessary strength and durability for long‐span structures. These girders must be able to carry significant loads without bending or failing.
What is the primary purpose of fireproofing in steel structures?
A Prevent rust
B Enhance aesthetics
C Improve fire resistance
D Reduce cost
Fireproofing is applied to steel structures to improve their fire resistance. Since steel loses its strength at high temperatures, fireproofing materials like coatings and concrete encasements help protect the structure during a fire.
Which type of steel member is used to resist compressive forces in a structure?
A Column
B Tension member
C Bracing
D Beam
Columns are steel members designed to resist compressive forces. They transfer loads from beams and slabs to the foundation, helping maintain the stability of the overall structure.
What is the typical use of a gantry girder in industrial settings?
A Carry pedestrian loads
B Provide support for roof trusses
C Resist seismic forces
D Support crane loads
Gantry girders are specifically designed to support crane loads in industrial buildings. These girders must be capable of handling heavy vertical and horizontal forces due to the movement of cranes and lifting equipment.
What is the primary function of a roof truss in a steel structure?
A Provide aesthetic appeal
B Support roof loads
C Resist wind forces
D Support column loads
Roof trusses are used to support roof loads and transfer them to the supporting walls or columns. They help distribute the weight of the roof evenly, making them essential for the stability of large buildings.
What type of buckling occurs when a beam twists while bending?
A Lateral torsional buckling
B Local buckling
C Flexural buckling
D Global buckling
Lateral torsional buckling occurs when a beam experiences both bending and twisting, typically under high bending moments. This type of buckling is a concern in long, slender beams.
What is the term used for the combination of steel and concrete in a single structure?
A Precast section
B Reinforced structure
C Composite structure
D Built‐up section
A composite structure combines the strength of steel and concrete. Steel provides tensile strength, while concrete resists compression, allowing for a more efficient use of materials and enhanced load‐bearing capacity.
Which of the following is a feature of cold-formed steel sections?
A They are produced by rolling steel at high temperatures.
B They are used for heavy load-bearing structures.
C They are typically made from aluminum.
D They are easy to fabricate and lightweight.
Cold-formed steel sections are manufactured by bending thin steel sheets at room temperature, making them lightweight and easy to fabricate. They are ideal for framing applications, such as in walls and roofs.
What is the function of a stiffener in plate girders?
A Distribute shear forces
B Prevent buckling
C Enhance aesthetic appeal
D Provide additional tension resistance
Stiffeners are used in plate girders to prevent buckling of the web or flanges. They add strength to the girder by providing additional support, ensuring that it can carry more load without failing.
Which material is commonly used to coat steel for corrosion protection?
A Paint
B Leather
C Copper
D Wood
Paint is the most common material used to protect steel from corrosion. It creates a protective layer that prevents moisture and air from coming into contact with the steel, reducing rust and degradation.
What is the primary purpose of prestressed steel in construction?
A Reduce cost
B Increase ductility
C Improve load-carrying capacity
D Enhance aesthetic value
Prestressed steel is used to improve the load-carrying capacity of structures. By introducing internal stresses that oppose external loads, prestressed steel reduces the likelihood of cracking and enhances the performance of elements like beams and bridges.