ILLINOIS STRUCTURAL ENGINEER EXAM PRACTICE QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT DOWNLOAD PDF
Core Domains
1. Structural Analysis & Mechanics (Loads, Forces, Deflections)
2. Steel Design and Detailing (AISC 360)
3. Reinforced Concrete Design (ACI 318)
4. Foundation and Geotechnical Engineering
5. Lateral Force Design (Wind and Seismic – ASCE 7)
6. Construction Documents, Codes, and Standards (IBC, Illinois-specific amendments)
7. Structural Materials and Durability (Wood, Masonry, Concrete, Steel)
8. Professional Practice, Ethics, and Contract Documents
9. Bridge and Special Structures (IDOT context)
10. Structural Load Paths and Redundancy
Introduction
,*This practice examination assesses the knowledge, skills, and judgment required for licensure as a Structural
Engineer in Illinois. The exam evaluates foundational theory, code application, ethical decision-making, and real-
world structural design scenarios. Each multiple-choice question is designed to mirror the complexity and
format of the actual licensing exam. Emphasis is placed on load path continuity, material-specific design
provisions, lateral force resisting systems, and compliance with IBC, ACI 318, AISC 360, ASCE 7, and Illinois
amendments. Candidates must demonstrate both technical accuracy and professional responsibility. This
assessment includes scenario-based questions requiring critical thinking and code application. Mastery of these
questions indicates readiness for independent structural engineering practice.*
SECTION ONE: QUESTIONS 1 – 100
1. A steel beam with a compact section is braced at 6 ft intervals. The unbraced length Lb is less than Lp per
AISC 360. What is the nominal moment capacity?
A. 0.7Fy Sx
B. 1.6Fy Zx
C. Mp = Fy Z x
D. Mn = Cb [Mp − (Mp − 0.7Fy Sx )(Lb − Lp )/(Lr − Lp )]
,🟢C
🔴 RATIONALE: When Lb ≤ Lp , the beam does not experience lateral-torsional buckling, and the nominal
moment capacity is the full plastic moment Mp = Fy Z x .
2. Which of the following loads is classified as an environmental load per ASCE 7?
A. Live load from occupants
B. Snow load on roof
C. Crane impact load
D. Construction load
🟢B
🔴 RATIONALE: Snow load is an environmental load. Live, crane, and construction loads are occupancy or
operational loads.
3. A reinforced concrete column is subjected to axial load only. The minimum eccentricity for design per ACI 318
is:
A. 0.10 times the column thickness
B. 0.6 in.
C. 0.5 in.
D. 0.1 in.
, 🟢A
🔴 RATIONALE: ACI 318 requires a minimum eccentricity of 0.1 times the column thickness to account for
construction tolerances and unintended bending.
4. For a site in Chicago with Ss = 1.2g and Site Class D, the short-period spectral response acceleration SMS
per ASCE 7 is Fa Ss . If Fa = 1.2, what is SMS ?
A. 1.44g
B. 1.20g
C. 1.00g
D. 0.84g
🟢A
🔴 RATIONALE: SMS = Fa Ss = 1.2 × 1.2 = 1.44g . This is used to calculate design spectral acceleration.
5. A structural engineer stamps drawings for a warehouse but does not visit the site. A construction error causes
partial collapse. This violates which ethical principle?
A. Confidentiality
B. Competence and duty of care
C. Conflict of interest
D. Advertising integrity
ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT DOWNLOAD PDF
Core Domains
1. Structural Analysis & Mechanics (Loads, Forces, Deflections)
2. Steel Design and Detailing (AISC 360)
3. Reinforced Concrete Design (ACI 318)
4. Foundation and Geotechnical Engineering
5. Lateral Force Design (Wind and Seismic – ASCE 7)
6. Construction Documents, Codes, and Standards (IBC, Illinois-specific amendments)
7. Structural Materials and Durability (Wood, Masonry, Concrete, Steel)
8. Professional Practice, Ethics, and Contract Documents
9. Bridge and Special Structures (IDOT context)
10. Structural Load Paths and Redundancy
Introduction
,*This practice examination assesses the knowledge, skills, and judgment required for licensure as a Structural
Engineer in Illinois. The exam evaluates foundational theory, code application, ethical decision-making, and real-
world structural design scenarios. Each multiple-choice question is designed to mirror the complexity and
format of the actual licensing exam. Emphasis is placed on load path continuity, material-specific design
provisions, lateral force resisting systems, and compliance with IBC, ACI 318, AISC 360, ASCE 7, and Illinois
amendments. Candidates must demonstrate both technical accuracy and professional responsibility. This
assessment includes scenario-based questions requiring critical thinking and code application. Mastery of these
questions indicates readiness for independent structural engineering practice.*
SECTION ONE: QUESTIONS 1 – 100
1. A steel beam with a compact section is braced at 6 ft intervals. The unbraced length Lb is less than Lp per
AISC 360. What is the nominal moment capacity?
A. 0.7Fy Sx
B. 1.6Fy Zx
C. Mp = Fy Z x
D. Mn = Cb [Mp − (Mp − 0.7Fy Sx )(Lb − Lp )/(Lr − Lp )]
,🟢C
🔴 RATIONALE: When Lb ≤ Lp , the beam does not experience lateral-torsional buckling, and the nominal
moment capacity is the full plastic moment Mp = Fy Z x .
2. Which of the following loads is classified as an environmental load per ASCE 7?
A. Live load from occupants
B. Snow load on roof
C. Crane impact load
D. Construction load
🟢B
🔴 RATIONALE: Snow load is an environmental load. Live, crane, and construction loads are occupancy or
operational loads.
3. A reinforced concrete column is subjected to axial load only. The minimum eccentricity for design per ACI 318
is:
A. 0.10 times the column thickness
B. 0.6 in.
C. 0.5 in.
D. 0.1 in.
, 🟢A
🔴 RATIONALE: ACI 318 requires a minimum eccentricity of 0.1 times the column thickness to account for
construction tolerances and unintended bending.
4. For a site in Chicago with Ss = 1.2g and Site Class D, the short-period spectral response acceleration SMS
per ASCE 7 is Fa Ss . If Fa = 1.2, what is SMS ?
A. 1.44g
B. 1.20g
C. 1.00g
D. 0.84g
🟢A
🔴 RATIONALE: SMS = Fa Ss = 1.2 × 1.2 = 1.44g . This is used to calculate design spectral acceleration.
5. A structural engineer stamps drawings for a warehouse but does not visit the site. A construction error causes
partial collapse. This violates which ethical principle?
A. Confidentiality
B. Competence and duty of care
C. Conflict of interest
D. Advertising integrity
