WorksheetsMultiple Choice Questions: Introduction to Steel Structures
Total questions: 40
Worksheet time: 23mins
Steel materials have advantages over concrete in terms of:
Resistance to corrosion
Heavier structural weight
High tensile strength and ductility
Lower material costs
Properties of steel that allow large plastic deformation to occur before breaking it is called:
Melting strength
Ultimate strength
Ductility
Violence
The modulus of elasticity of steel generally ranges from:
100 GPa
150 GPa
200 GPa
250 GPa
The following is not a type of structural steel:
Carbon steel
High strength low alloy steel
Stainless steel
Cast steel
The steel manufacturing process involves the formation of steel profiles through hot rolling is called:
Cold forming
Hot rolling
Extrusion
Casting
Steel structure planning standards that are commonly used in Indonesia is:
SNI 03-1729-2019
SNI 03-2847-2019
SNI 03-1727-2019
SNI 03-1726-2019
In steel structure design, the strength reduction factor (ϕ) is used to:
Reduce the workload
Increase the nominal capacity of the cross-section
Taking into account material and manufacturing uncertainties
Increase structural ductility
What does LRFD stand for in steel structure planning methods?
Load Resistance Factor Design
Limit State Factor Design
Load and Resistance Factor Design
Limit Load Factor Design
What is meant by yield stress (fy) in steel is:
Advantages of using steel structures compared to wooden structures is:
Resistant to termite attacks
Lower maintenance costs
Lighter weight
Better fire resistance
The main function of tension rods in a structure is:
Withstand axial compressive forces
Withstand axial tensile forces
Withstand bending moments
Withstand shear forces
One of the design criteria for tension rods is:
Yield failure at gross cross-sectional area
Local buckling failure
Shear failure of joints
Yield failure at net cross-sectional area
The net cross-sectional area (An) for the tension rod is:
Total cross-sectional area without reducing the holes
Gross cross-sectional area minus bolt hole area
Strength reduction factor (γ) for yield failure at cross-sectional area the gross pull rod is:
0.75
0.85
0.90
1.00
The effect of bolt holes on the cross-section of the tension rod causes:
Increased tensile strength
Decrease in effective cross-sectional area
Increased ductility
Decrease in yield stress
The conditions of collapse that can occur in tension rods are:
Melting at gross cross-section and bending
Melting at net cross-section and bending
Melting on gross-section and fracture on net cross-section
Local bending and global bending
The minimum recommended plate width to prevent block shear rupture in tension bar bolted connections is:
The smaller the better
There are no limits
Depends on the number of bolts
Must meet certain requirements of the standard
The strength reduction factor (γ) for fracture failure at the effective net cross-sectional area of the tension bar is:
0.75
0.85
0.90
1.00
What is meant by the shear lag effect on tension rods is:
Uneven stress distribution on the cross-section due to connections
Delay in melting of the cross-section
Shifting of the center of gravity of the cross section
Effect of vibration on the tension rod
For double angle profiles that are connected to one of the legs, the shear lag factor (U) value is generally:
Equal to 1.0
Less than 1.0
Greater than 1.0
Not relevant
The main failure conditions that need to be considered in compression members are:
Melt
Fracture
Bend
Slide
The factor that most influences the bending capacity of a compression rod is:
Slenderness ratio
Length of the rod
Type of support
Surface finish
The effective length (KL) of a column is:
Actual length of column
The actual length of the column multiplied by the effective length factor (K)
Actual length of column minus length of connection
Actual length of column plus length of connection
The effective length factor (K) for a column with hinges at both ends is:
0.5
0.7
1.0
2.0
Local buckling conditions can occur if:
High cross-sectional slimness ratio
The width of the plate element is relatively thick
The width-to-thickness ratio of the plate elements exceeds the permitted limit.
The steel used has low yield strength
The slenderness ratio (ŷ) of a compression member is defined as:
(K * L) / r
L / r
r / (K * L)
The buckling curve in compression member design describes:
Relationship between compressive stress and strain
Relationship between compressive load and lateral deformation
Relationship between critical bending stress and slenderness ratio
Relationship between effective length and moment of inertia
The strength reduction factor (ÿ) for a compression rod in bending condition is:
0.75
0.85
0.90
1.00
The most efficient steel profile for resisting compressive forces is:
Profile I
T Profile
HSS Profile (Hollow Structural Section)
Channel Profile
In HSS profiles, the width-to-thickness ratio constraints of plate elements to prevent local buckling are stricter than in open flange profiles because:
The plate elements are not confined on one side only.
The plate elements are confined on all sides
Has a smaller radius of gyration
Made of different types of steel
Bolted connections have several failure modes, except:
Slide the bolt
Torn bolt holes on the plate (bearing failure)
Pull the bolt
Bolt flexibility
The nominal shear strength of one bolt (Rn) is calculated based on:
Cross-sectional area of bolts and yield stress of steel
Cross-sectional area of the bolt and ultimate tensile stress of the bolt
Cross-sectional area of the bolt and ultimate shear stress of the bolt
Bolt diameter and plate thickness
The types of bolts generally used for structural connections are:
Common black bolts
High-strength bolts
Light steel bolts
Stainless steel bolts
For bearing-type bolt connections, slide the bolts occurs when:
The plate is torn
The bolt is permanently shifted in its hole
The shear stress on the bolt reaches its ultimate shear stress.
The bolt experiences elongation
The strength reduction factor (γ) for shear failure of bolts is:
0.65
0.70
The bearing force on the plate due to the bolts is calculated based on:
Bolt diameter and plate thickness
Bolt diameter and plate yield stress
Bolt diameter, plate thickness, and ultimate tensile stress of the plate
Bolt diameter, plate thickness, and distance between bolts
Minimum edge distance (end distance) and minimum bolt pitch (pitch distance) is set to prevent:
Local buckling of the plate
Block shear rupture failure
Torn or broken at the end of the plate
Excessive deformation at the joint
Friction type bolted connections (slip-critical connections) are designed for:
Prevent slippage between plates under working load conditions.
Maximize deformation at the joint
Facilitates installation in the field
Reduce the number of bolts required
If the shear plane passes through the bolt thread (threaded portion), then:
The shear strength of the bolt will increase
The shear strength of the bolt will be reduced
There is no effect on the shear strength of the bolt
The bolt cannot withstand shear forces.
What is meant by block shear rupture is:
Plate failure due to simultaneous shear and tension in the joint area
Bolt failure due to simultaneous shear and tension
Plate failure due to local buckling
Bolt failure due to excessive support
