Post-Tensioned Concrete Special Inspector
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1. A post-tensioning system is primarily used to:
A. Increase concrete density
B. Reduce curing time
C. Introduce compressive stresses to counteract tensile forces
D. Eliminate the need for reinforcement
✔ Correct Answer: C. Introduce compressive stresses to counteract tensile
forces
Explanation: Post-tensioning applies compressive force to concrete,
improving its performance under tensile loading conditions.
2. Which component anchors the tendon force into the concrete?
A. Sheathing
B. Anchorage
C. Duct
D. Spacer
✔ Correct Answer: B. Anchorage
Explanation: Anchorages transfer the prestressing force from the tendon
to the concrete structure.
3. The elongation of a tendon during stressing is primarily used to:
A. Measure concrete strength
, B. Confirm applied force
C. Check grout consistency
D. Verify anchor placement
✔ Correct Answer: B. Confirm applied force
Explanation: Measured elongation is compared with theoretical values to
verify proper prestressing force.
4. What is the typical material used for post-tensioning tendons?
A. Aluminum
B. Mild steel
C. High-strength steel
D. Copper
✔ Correct Answer: C. High-strength steel
Explanation: High-strength steel provides the required tensile capacity for
prestressing applications.
5. A bonded post-tensioning system differs from unbonded because:
A. It uses plastic ducts
B. Tendons are greased
C. Tendons are grouted after stressing
D. It requires no anchorages
✔ Correct Answer: C. Tendons are grouted after stressing
Explanation: Grouting bonds the tendon to the concrete along its length,
improving load transfer.
6. The primary purpose of duct in bonded systems is to:
A. Protect anchorages
B. Allow tendon movement
C. Provide a path for grout and tendon placement
D. Reduce stress losses
✔ Correct Answer: C. Provide a path for grout and tendon placement
Explanation: Ducts house the tendon and later allow grout injection for
bonding.
, 7. Which document governs most post-tensioning inspection practices in the
U.S.?
A. ASTM C150
B. ACI 318
C. OSHA 1926
D. AASHTO LRFD
✔ Correct Answer: B. ACI 318
Explanation: ACI 318 provides structural concrete design and inspection
requirements including prestressing.
8. What is the primary hazard during stressing operations?
A. Concrete cracking
B. Tendon rupture
C. Grout leakage
D. Formwork failure
✔ Correct Answer: B. Tendon rupture
Explanation: High tension forces pose significant safety risks if tendons
fail.
9. A stressing jack must be calibrated:
A. Once per project
B. Weekly
C. At specified intervals and after repairs
D. Only when malfunctioning
✔ Correct Answer: C. At specified intervals and after repairs
Explanation: Regular calibration ensures accurate force application.
10.The wedge in an anchorage system functions to:
A. Lubricate tendons
B. Grip and hold the tendon
C. Measure elongation
D. Seal grout
✔ Correct Answer: B. Grip and hold the tendon
Explanation: Wedges lock the tendon in place after stressing.
Certification Practice Exam Newest (2025 -
2026 Update) From Real Past Papers Questions
– Set 100 Most Common Exam Frequently
Tested Questions And Answers In Details 100%
Verified Exam Highly Recommendable For
Grade A+
1. A post-tensioning system is primarily used to:
A. Increase concrete density
B. Reduce curing time
C. Introduce compressive stresses to counteract tensile forces
D. Eliminate the need for reinforcement
✔ Correct Answer: C. Introduce compressive stresses to counteract tensile
forces
Explanation: Post-tensioning applies compressive force to concrete,
improving its performance under tensile loading conditions.
2. Which component anchors the tendon force into the concrete?
A. Sheathing
B. Anchorage
C. Duct
D. Spacer
✔ Correct Answer: B. Anchorage
Explanation: Anchorages transfer the prestressing force from the tendon
to the concrete structure.
3. The elongation of a tendon during stressing is primarily used to:
A. Measure concrete strength
, B. Confirm applied force
C. Check grout consistency
D. Verify anchor placement
✔ Correct Answer: B. Confirm applied force
Explanation: Measured elongation is compared with theoretical values to
verify proper prestressing force.
4. What is the typical material used for post-tensioning tendons?
A. Aluminum
B. Mild steel
C. High-strength steel
D. Copper
✔ Correct Answer: C. High-strength steel
Explanation: High-strength steel provides the required tensile capacity for
prestressing applications.
5. A bonded post-tensioning system differs from unbonded because:
A. It uses plastic ducts
B. Tendons are greased
C. Tendons are grouted after stressing
D. It requires no anchorages
✔ Correct Answer: C. Tendons are grouted after stressing
Explanation: Grouting bonds the tendon to the concrete along its length,
improving load transfer.
6. The primary purpose of duct in bonded systems is to:
A. Protect anchorages
B. Allow tendon movement
C. Provide a path for grout and tendon placement
D. Reduce stress losses
✔ Correct Answer: C. Provide a path for grout and tendon placement
Explanation: Ducts house the tendon and later allow grout injection for
bonding.
, 7. Which document governs most post-tensioning inspection practices in the
U.S.?
A. ASTM C150
B. ACI 318
C. OSHA 1926
D. AASHTO LRFD
✔ Correct Answer: B. ACI 318
Explanation: ACI 318 provides structural concrete design and inspection
requirements including prestressing.
8. What is the primary hazard during stressing operations?
A. Concrete cracking
B. Tendon rupture
C. Grout leakage
D. Formwork failure
✔ Correct Answer: B. Tendon rupture
Explanation: High tension forces pose significant safety risks if tendons
fail.
9. A stressing jack must be calibrated:
A. Once per project
B. Weekly
C. At specified intervals and after repairs
D. Only when malfunctioning
✔ Correct Answer: C. At specified intervals and after repairs
Explanation: Regular calibration ensures accurate force application.
10.The wedge in an anchorage system functions to:
A. Lubricate tendons
B. Grip and hold the tendon
C. Measure elongation
D. Seal grout
✔ Correct Answer: B. Grip and hold the tendon
Explanation: Wedges lock the tendon in place after stressing.
