ICC Structural Steel and Bolting Special
Inspector Certification Newest (2026
Update) Actual Practice Questions – Set
150+ Most Common Exam Frequently
Tested Questions And Answers In
Details 100% Verified Exam Highly
Recommendable For Grade A+
1. A high-strength bolt installed in a slip-critical connection primarily relies on
which mechanism for load transfer?
A. Bearing of bolt shank against hole
B. Friction between connected plates
C. Weld fusion strength
D. Shear deformation of bolt threads
Answer: ✔ B. (Friction between connected plates)
Rationale: In slip-critical connections, load is transferred through friction
developed by bolt pretension clamping the faying surfaces together.
2. What is the primary purpose of pre-tensioning high-strength bolts in
structural steel connections?
A. Reduce bolt diameter
B. Prevent corrosion
C. Increase frictional resistance between plies
D. Allow bolts to yield before steel
,Answer: ✔ C. (Increase frictional resistance between plies)
Rationale: Pretension creates clamping force that increases friction and prevents
slip in the joint.
3. In structural steel inspection, what is the acceptable method for verifying
bolt pretension using the turn-of-nut method?
A. Measuring bolt temperature
B. Counting nut rotation from snug-tight condition
C. Checking weld bead size
D. Measuring bolt elongation only
Answer: ✔ B. (Counting nut rotation from snug-tight condition)
Rationale: Turn-of-nut method ensures proper tension by rotating the nut a
specified amount after snug-tightening.
4. What is the primary function of ASTM A325 and A490 bolts?
A. Decorative fastening
B. High-strength structural connections
C. Temporary scaffolding
D. Electrical grounding
Answer: ✔ B. (High-strength structural connections)
Rationale: These bolts are designed for structural steel connections requiring high
strength and reliability.
5. A bolted joint classified as “bearing-type” primarily transfers load through:
A. Friction only
B. Weld shear
C. Bolt bearing against hole walls
D. Adhesive bonding
Answer: ✔ C. (Bolt bearing against hole walls)
Rationale: Bearing-type connections allow limited slip and transfer load through
contact between bolt and hole.
, 6. What is the minimum required condition before applying the turn-of-nut
method?
A. Painted surfaces
B. Snug-tight condition
C. Fully welded joint
D. Galvanized coating only
Answer: ✔ B. (Snug-tight condition)
Rationale: Turn-of-nut method begins only after all plies are brought into firm
contact (snug-tight).
7. Which defect is most critical in high-strength bolted connections?
A. Slight paint overspray
B. Missing washers in non-critical joints
C. Under-tensioned bolts in slip-critical connections
D. Minor surface rust
Answer: ✔ C. (Under-tensioned bolts in slip-critical connections)
Rationale: Insufficient pretension reduces friction capacity and may cause joint
slip or failure.
8. In steel inspection, “faying surfaces” refer to:
A. Bolt heads
B. Weld zones
C. Contact surfaces between connected steel parts
D. Anchor rods
Answer: ✔ C. (Contact surfaces between connected steel parts)
Rationale: Faying surfaces are the mating surfaces in bolted connections that
develop friction.
9. What is the primary concern when inspecting galvanized high-strength
bolts?
A. Color variation
B. Lubrication affecting torque-tension relationship
, C. Thread length only
D. Weld compatibility
Answer: ✔ B. (Lubrication affecting torque-tension relationship)
Rationale: Galvanizing changes friction properties, affecting torque-based
installation methods.
10.Which ASTM specification governs structural bolts used in heavy steel
construction (legacy designation)?
A. ASTM A36
B. ASTM A325
C. ASTM A500
D. ASTM A53
Answer: ✔ B. (ASTM A325)
Rationale: A325 bolts are historically used for structural steel connections
requiring high strength.
11.A “snug-tight” joint is best described as:
A. Fully tensioned bolt
B. Tightened with impact wrench to yield
C. Tightened to bring plies into firm contact
D. Loosely installed bolt
Answer: ✔ C. (Tightened to bring plies into firm contact)
Rationale: Snug-tight condition ensures alignment and full contact before final
tensioning.
12.Which inspection method directly measures bolt elongation?
A. Turn-of-nut method
B. Direct tension indicator
C. Calibrated wrench method
D. Ultrasonic tension measurement
Inspector Certification Newest (2026
Update) Actual Practice Questions – Set
150+ Most Common Exam Frequently
Tested Questions And Answers In
Details 100% Verified Exam Highly
Recommendable For Grade A+
1. A high-strength bolt installed in a slip-critical connection primarily relies on
which mechanism for load transfer?
A. Bearing of bolt shank against hole
B. Friction between connected plates
C. Weld fusion strength
D. Shear deformation of bolt threads
Answer: ✔ B. (Friction between connected plates)
Rationale: In slip-critical connections, load is transferred through friction
developed by bolt pretension clamping the faying surfaces together.
2. What is the primary purpose of pre-tensioning high-strength bolts in
structural steel connections?
A. Reduce bolt diameter
B. Prevent corrosion
C. Increase frictional resistance between plies
D. Allow bolts to yield before steel
,Answer: ✔ C. (Increase frictional resistance between plies)
Rationale: Pretension creates clamping force that increases friction and prevents
slip in the joint.
3. In structural steel inspection, what is the acceptable method for verifying
bolt pretension using the turn-of-nut method?
A. Measuring bolt temperature
B. Counting nut rotation from snug-tight condition
C. Checking weld bead size
D. Measuring bolt elongation only
Answer: ✔ B. (Counting nut rotation from snug-tight condition)
Rationale: Turn-of-nut method ensures proper tension by rotating the nut a
specified amount after snug-tightening.
4. What is the primary function of ASTM A325 and A490 bolts?
A. Decorative fastening
B. High-strength structural connections
C. Temporary scaffolding
D. Electrical grounding
Answer: ✔ B. (High-strength structural connections)
Rationale: These bolts are designed for structural steel connections requiring high
strength and reliability.
5. A bolted joint classified as “bearing-type” primarily transfers load through:
A. Friction only
B. Weld shear
C. Bolt bearing against hole walls
D. Adhesive bonding
Answer: ✔ C. (Bolt bearing against hole walls)
Rationale: Bearing-type connections allow limited slip and transfer load through
contact between bolt and hole.
, 6. What is the minimum required condition before applying the turn-of-nut
method?
A. Painted surfaces
B. Snug-tight condition
C. Fully welded joint
D. Galvanized coating only
Answer: ✔ B. (Snug-tight condition)
Rationale: Turn-of-nut method begins only after all plies are brought into firm
contact (snug-tight).
7. Which defect is most critical in high-strength bolted connections?
A. Slight paint overspray
B. Missing washers in non-critical joints
C. Under-tensioned bolts in slip-critical connections
D. Minor surface rust
Answer: ✔ C. (Under-tensioned bolts in slip-critical connections)
Rationale: Insufficient pretension reduces friction capacity and may cause joint
slip or failure.
8. In steel inspection, “faying surfaces” refer to:
A. Bolt heads
B. Weld zones
C. Contact surfaces between connected steel parts
D. Anchor rods
Answer: ✔ C. (Contact surfaces between connected steel parts)
Rationale: Faying surfaces are the mating surfaces in bolted connections that
develop friction.
9. What is the primary concern when inspecting galvanized high-strength
bolts?
A. Color variation
B. Lubrication affecting torque-tension relationship
, C. Thread length only
D. Weld compatibility
Answer: ✔ B. (Lubrication affecting torque-tension relationship)
Rationale: Galvanizing changes friction properties, affecting torque-based
installation methods.
10.Which ASTM specification governs structural bolts used in heavy steel
construction (legacy designation)?
A. ASTM A36
B. ASTM A325
C. ASTM A500
D. ASTM A53
Answer: ✔ B. (ASTM A325)
Rationale: A325 bolts are historically used for structural steel connections
requiring high strength.
11.A “snug-tight” joint is best described as:
A. Fully tensioned bolt
B. Tightened with impact wrench to yield
C. Tightened to bring plies into firm contact
D. Loosely installed bolt
Answer: ✔ C. (Tightened to bring plies into firm contact)
Rationale: Snug-tight condition ensures alignment and full contact before final
tensioning.
12.Which inspection method directly measures bolt elongation?
A. Turn-of-nut method
B. Direct tension indicator
C. Calibrated wrench method
D. Ultrasonic tension measurement
