COLORADO STRUCTURAL STEEL AND BOLTING
SPECIAL INSPECTOR CERTIFICATION EXAM
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) Q&A 2026 |INSTANT DOWNLOAD PDF
1. What is the primary purpose of structural steel special
inspection during bolting operations?
A. To design steel connections
B. To ensure compliance with approved construction
documents and standards
C. To fabricate steel members in the shop
D. To replace the contractor’s quality control program
Rationale: Special inspectors verify compliance, not design or
fabrication.
Correct Answer: B
2. Which ASTM standard commonly applies to high-strength
structural bolts?
A. ASTM A36
B. ASTM A325 (now replaced by F3125 Grade A325)
C. ASTM A500
D. ASTM A992
,Rationale: F3125 covers structural bolts including former
A325/A490 designations.
Correct Answer: B
3. What is the main purpose of pretensioning bolts in
structural steel connections?
A. To reduce steel weight
B. To increase corrosion resistance
C. To improve joint friction and structural performance
D. To simplify fabrication
Rationale: Pretension creates clamping force for slip resistance.
Correct Answer: C
4. Which method is commonly used to verify bolt tension?
A. Visual inspection only
B. Turn-of-nut method
C. Magnetic testing
D. Paint thickness measurement
Rationale: Turn-of-nut is a standard tensioning verification
method.
Correct Answer: B
5. What does “snug-tight condition” mean?
,A. Full design tension applied
B. Tightened to maximum torque
C. Firm contact of plies without deformation or impact
wrenching
D. Loose fit for alignment only
Rationale: Snug-tight ensures full contact without pretension.
Correct Answer: C
6. Which organization publishes the AISC Specification?
A. OSHA
B. American Institute of Steel Construction
C. ASTM International
D. ANSI
Rationale: AISC issues steel design and construction standards.
Correct Answer: B
7. What is the primary role of a special inspector in bolted
connections?
A. Approve project budget
B. Verify bolt installation and tightening procedures
C. Design welds
D. Operate cranes
, Rationale: Inspectors ensure compliance with installation
requirements.
Correct Answer: B
8. Which condition may cause bolt relaxation after
installation?
A. Proper lubrication
B. Oversized holes
C. Surface coating creep or embedment loss
D. Use of calibrated wrenches
Rationale: Embedment and coating compression reduce
preload.
Correct Answer: C
9. What is the function of hardened washers in structural
bolting?
A. Reduce corrosion
B. Distribute load and prevent embedment loss
C. Increase bolt length
D. Act as spacers only
Rationale: Washers help maintain tension and load
distribution.
Correct Answer: B
SPECIAL INSPECTOR CERTIFICATION EXAM
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) Q&A 2026 |INSTANT DOWNLOAD PDF
1. What is the primary purpose of structural steel special
inspection during bolting operations?
A. To design steel connections
B. To ensure compliance with approved construction
documents and standards
C. To fabricate steel members in the shop
D. To replace the contractor’s quality control program
Rationale: Special inspectors verify compliance, not design or
fabrication.
Correct Answer: B
2. Which ASTM standard commonly applies to high-strength
structural bolts?
A. ASTM A36
B. ASTM A325 (now replaced by F3125 Grade A325)
C. ASTM A500
D. ASTM A992
,Rationale: F3125 covers structural bolts including former
A325/A490 designations.
Correct Answer: B
3. What is the main purpose of pretensioning bolts in
structural steel connections?
A. To reduce steel weight
B. To increase corrosion resistance
C. To improve joint friction and structural performance
D. To simplify fabrication
Rationale: Pretension creates clamping force for slip resistance.
Correct Answer: C
4. Which method is commonly used to verify bolt tension?
A. Visual inspection only
B. Turn-of-nut method
C. Magnetic testing
D. Paint thickness measurement
Rationale: Turn-of-nut is a standard tensioning verification
method.
Correct Answer: B
5. What does “snug-tight condition” mean?
,A. Full design tension applied
B. Tightened to maximum torque
C. Firm contact of plies without deformation or impact
wrenching
D. Loose fit for alignment only
Rationale: Snug-tight ensures full contact without pretension.
Correct Answer: C
6. Which organization publishes the AISC Specification?
A. OSHA
B. American Institute of Steel Construction
C. ASTM International
D. ANSI
Rationale: AISC issues steel design and construction standards.
Correct Answer: B
7. What is the primary role of a special inspector in bolted
connections?
A. Approve project budget
B. Verify bolt installation and tightening procedures
C. Design welds
D. Operate cranes
, Rationale: Inspectors ensure compliance with installation
requirements.
Correct Answer: B
8. Which condition may cause bolt relaxation after
installation?
A. Proper lubrication
B. Oversized holes
C. Surface coating creep or embedment loss
D. Use of calibrated wrenches
Rationale: Embedment and coating compression reduce
preload.
Correct Answer: C
9. What is the function of hardened washers in structural
bolting?
A. Reduce corrosion
B. Distribute load and prevent embedment loss
C. Increase bolt length
D. Act as spacers only
Rationale: Washers help maintain tension and load
distribution.
Correct Answer: B
