Illinois Structural Steel Contractor
Licensing Examination Practice
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. Which of the following is the primary material used in structural steel
construction?
A. Aluminum
B. Steel
C. Concrete
D. Wood
Steel is the standard material for structural steel construction due to
its strength, durability, and flexibility.
2. What is the minimum yield strength for ASTM A36 structural steel?
A. 30 ksi
, B. 40 ksi
C. 36 ksi
D. 50 ksi
ASTM A36 steel has a minimum yield strength of 36 ksi, commonly
used in construction.
3. Which connection type is considered non-friction and does not rely on
tightness for strength?
A. Bolted slip-critical
B. Simple bolted
C. Welded moment
D. Riveted
Simple bolted connections rely on bearing and are not dependent on
friction between plates.
4. What is the primary purpose of a stiffener in a steel beam?
A. Increase beam length
B. Prevent local buckling
C. Reduce corrosion
D. Connect beams
Stiffeners are used to prevent local buckling of web panels in beams
under high compressive stress.
5. Which welding process uses a continuously fed consumable electrode
in an inert gas?
A. SMAW
, B. FCAW
C. GMAW (MIG welding)
D. Oxy-fuel welding
GMAW or MIG welding uses a continuously fed wire electrode with
shielding gas to protect the weld.
6. In structural steel design, what does L/360 represent?
A. Load factor
B. Yield stress
C. Maximum deflection limit
D. Bolt spacing
L/360 is the maximum allowable deflection for beams, where L is the
span length.
7. Which type of steel beam is most commonly used in floor framing?
A. Channel
B. Angle
C. I-beam (W-shape)
D. Plate girder
Wide flange I-beams are standard for floor framing due to high
bending efficiency.
8. What is the recommended minimum edge distance for a bolt in
structural steel?
A. 1x bolt diameter
B. 1.5x bolt diameter
, C. 2x bolt diameter
D. 3x bolt diameter
Minimum edge distance is typically twice the bolt diameter to
prevent tearing of the steel plate.
9. Which standard governs the design of structural steel in the United
States?
A. AISC 303
B. AISC 360
C. ASTM A992
D. AWS D1.1
AISC 360 is the Specification for Structural Steel Buildings, used in the
U.S.
10. Which type of beam is designed to resist lateral-torsional
buckling?
A. Cantilever beam
B. Simple beam
C. Laterally braced beam
D. Plate girder
Lateral bracing prevents twisting and increases the load-carrying
capacity of beams.
11. What is the primary purpose of primer paint on structural steel?
y y y y y y y y y y
A. Color coding
y
B. Aesthetic finish
y
Licensing Examination Practice
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. Which of the following is the primary material used in structural steel
construction?
A. Aluminum
B. Steel
C. Concrete
D. Wood
Steel is the standard material for structural steel construction due to
its strength, durability, and flexibility.
2. What is the minimum yield strength for ASTM A36 structural steel?
A. 30 ksi
, B. 40 ksi
C. 36 ksi
D. 50 ksi
ASTM A36 steel has a minimum yield strength of 36 ksi, commonly
used in construction.
3. Which connection type is considered non-friction and does not rely on
tightness for strength?
A. Bolted slip-critical
B. Simple bolted
C. Welded moment
D. Riveted
Simple bolted connections rely on bearing and are not dependent on
friction between plates.
4. What is the primary purpose of a stiffener in a steel beam?
A. Increase beam length
B. Prevent local buckling
C. Reduce corrosion
D. Connect beams
Stiffeners are used to prevent local buckling of web panels in beams
under high compressive stress.
5. Which welding process uses a continuously fed consumable electrode
in an inert gas?
A. SMAW
, B. FCAW
C. GMAW (MIG welding)
D. Oxy-fuel welding
GMAW or MIG welding uses a continuously fed wire electrode with
shielding gas to protect the weld.
6. In structural steel design, what does L/360 represent?
A. Load factor
B. Yield stress
C. Maximum deflection limit
D. Bolt spacing
L/360 is the maximum allowable deflection for beams, where L is the
span length.
7. Which type of steel beam is most commonly used in floor framing?
A. Channel
B. Angle
C. I-beam (W-shape)
D. Plate girder
Wide flange I-beams are standard for floor framing due to high
bending efficiency.
8. What is the recommended minimum edge distance for a bolt in
structural steel?
A. 1x bolt diameter
B. 1.5x bolt diameter
, C. 2x bolt diameter
D. 3x bolt diameter
Minimum edge distance is typically twice the bolt diameter to
prevent tearing of the steel plate.
9. Which standard governs the design of structural steel in the United
States?
A. AISC 303
B. AISC 360
C. ASTM A992
D. AWS D1.1
AISC 360 is the Specification for Structural Steel Buildings, used in the
U.S.
10. Which type of beam is designed to resist lateral-torsional
buckling?
A. Cantilever beam
B. Simple beam
C. Laterally braced beam
D. Plate girder
Lateral bracing prevents twisting and increases the load-carrying
capacity of beams.
11. What is the primary purpose of primer paint on structural steel?
y y y y y y y y y y
A. Color coding
y
B. Aesthetic finish
y
