HIGHWAY BRIDGE SAFETY INSPECTION
NHI SAFETY INSPECTION OF IN-SERVICE BRIDGES
FINAL EXAM | 147 QUESTIONS | WITH CORRECT
SOLUTIONS!! 2026/2027
A+
Complete Blueprint Coverage • Official Domain Alignment • Verified Rationales
A+ 7 100%
QUESTIONS VERIFIED EXAM DOMAINS COVERED RATIONALES INCLUDED
CATEGORIES
1. Bridge Inspection Fundamentals, Roles & Safety Responsibilities
2. Inspection Equipment, Access Methods & Site Safety Controls
3. Bridge Materials, Defect Recognition & Deterioration Mechanisms
4. Deck, Joint, Bearing & Superstructure Inspection & Evaluation
5. Substructure, Foundations, Culverts, Waterways & Scour
6. Condition Ratings, Element-Level Evaluation, Load Path & Critical Findings
7. Documentation, Reporting, NDE Methods & Inspection Intervals
STUVIAACTUALEXAM
,1. Bridge Inspection Fundamentals, Roles & Safety Responsibilities
Q1
An inspection team leader arrives at a multi-span steel girder bridge over an active rail line. The leader holds a PE license and
18 months of experience but has not completed comprehensive FHWA-approved training. What is required before the leader
may sign the inspection report?
A. PE license alone satisfies NBIS team-leader requirements.
B. Completion of FHWA-approved comprehensive bridge inspection training plus meeting the experience threshold.
C. Eighteen months of experience is sufficient if a program manager co-signs.
D. Only a five-year certified technician may lead railroad-overpass inspections.
Correct Answer: B
Rationale:
NBIS requires both an FHWA-approved comprehensive training course and the defined experience. A PE license does not waive training;
co-signature does not substitute for the team leader's own qualifications.
Q2
During a routine inspection of a continuous concrete box-girder bridge, an inspector finds a sudden 1.5-inch elevation change at
an interior pier that was absent two years earlier. No load restriction is posted. What immediate action is required?
A. Document in the routine report and schedule a special inspection within 90 days.
B. Classify as a critical finding, notify the owner and FHWA per state procedures, and evaluate need for interim load restriction or
closure.
C. Finish inspecting all spans first, then address settlement in the final rating.
D. Re-measure at day's end and average the readings before deciding significance.
Correct Answer: B
Rationale:
Sudden settlement of this magnitude is a potential critical finding that may affect capacity or public safety. Prompt notification and evaluation for
interim action are required; deferral is not acceptable.
Q3
A quality-assurance review shows inspectors routinely omitted secondary members and bracing even when those members
exhibited section loss. What is the primary deficiency?
A. Inspectors correctly prioritize primary members and may omit secondary members when time is limited.
B. Secondary members and bracing are part of the structural system and must be inspected and documented when accessible;
omission violates standards.
C. Secondary-member documentation is required only on fracture-critical structures.
D. Section loss on bracing is never structural and need not be recorded.
Correct Answer: B
Rationale:
BIRM and NBIS require systematic inspection of all structural components, including secondary members. They can affect load distribution and
redundancy.
, Q4
A fracture-critical two-girder steel bridge has fatigue cracks at web-to-flange welds near mid-span. What inspection intensity and
interval apply to the non-redundant tension members?
A. Routine 24-month inspection with photographic monitoring is adequate.
B. Hands-on inspection of the non-redundant steel tension members at intervals not exceeding 24 months, with shorter intervals if
conditions warrant.
C. Ground-based binocular inspection every 48 months is acceptable.
D. Only members with active crack growth need annual hands-on inspection.
Correct Answer: B
Rationale:
NBIS mandates hands-on inspection of nonredundant steel tension members at intervals not exceeding 24 months. Existing fatigue cracks
typically justify closer intervals.
Q5
A team plans a night inspection of a high-traffic urban viaduct to reduce disruption. Night work reduces visibility of defects. What
is the correct decision?
A. Night inspections are prohibited on structures with ADT greater than 10,000.
B. Night inspections may proceed if adequate artificial lighting is provided and the plan addresses visibility limits and safety
controls.
C. All defects are equally visible at night, so lighting intensity is irrelevant.
D. Night work automatically requires an underwater dive team on standby.
Correct Answer: B
Rationale:
Night inspections are permitted when lighting, traffic control, and visibility limitations are properly addressed. Absolute ADT-based prohibitions do
not exist in federal standards.
Q6
A newly hired inspector asks the difference between a routine inspection and an in-depth inspection for a cable-stayed bridge.
What is the correct distinction?
A. Routine inspections always include hands-on examination of every cable; in-depth inspections are limited to deck-level
overview.
B. Routine inspections are regularly scheduled visual examinations of accessible elements; in-depth inspections provide close,
hands-on examination of selected critical components, often with specialized access or NDE.
C. In-depth inspections occur only after a critical finding; routine inspections are annual regardless of condition.
D. The terms are interchangeable under NBIS.
Correct Answer: B
Rationale:
BIRM defines routine inspections as regularly scheduled visual assessments. In-depth inspections involve close examination of critical details
and may use specialized access or NDE.
Q7
A timber-bridge report rates the superstructure 5 even though multiple floor beams show advanced decay and reduced section.
What is the correct QA response?
A. Rating 5 is acceptable because timber bridges are expected to show decay.
B. The rating should be lowered to reflect decay that affects capacity; the report must be revised and the owner notified if capacity
is compromised.
C. Condition ratings are subjective and cannot be challenged by QA.
D. Only the deck rating may be adjusted; timber superstructure ratings are fixed at 5.
Correct Answer: B
Rationale:
Condition ratings must reflect deficiencies that affect structural performance. Advanced decay in floor beams warrants a lower rating and possible
capacity evaluation.
NHI SAFETY INSPECTION OF IN-SERVICE BRIDGES FINAL EXAM | 2026/2027 Page 3
, Q8
A structure built in 1968 was widened in 2019. How should year-built and year-reconstructed be coded under SNBI?
A. Year built remains 1968; year reconstructed is left blank because widening is not reconstruction.
B. Year built is updated to 2019 and the original year discarded.
C. Year built remains 1968 and year reconstructed is coded 2019.
D. Both fields remain blank until a full load rating is performed.
Correct Answer: C
Rationale:
SNBI retains the original year built and records major reconstruction or widening in the reconstruction field, preserving historical data.
Q9
Channel migration has placed the main channel against a previously non-scour-critical pier. What update and follow-up are
required?
A. No change is needed if embedment still meets original design plans.
B. Scour vulnerability must be re-evaluated; the structure may need reclassification and an updated plan of action.
C. Channel migration is outside safety-inspection scope and is handled solely by hydraulic engineers.
D. Only bridges already coded scour-critical require channel-location monitoring.
Correct Answer: B
Rationale:
Significant channel migration that changes flow attack requires re-evaluation of scour vulnerability and possible plan-of-action updates.
Q10
Load-posting signs for a 20-ton restriction are faded and one is missing. What is the inspector's immediate responsibility?
A. Note the condition and recommend replacement in the next maintenance cycle.
B. Report the missing and deficient signing as a critical safety issue requiring prompt correction so the public is warned of the
restriction.
C. Ignore signing deficiencies; they fall under traffic engineering, not bridge inspection.
D. Temporarily raise the posted limit until new signs are installed.
Correct Answer: B
Rationale:
Missing or illegible load-posting signs are a public-safety deficiency that must be reported for immediate correction.
Q11
A simple-span prestressed concrete girder bridge has no known deficiencies and low ADT. What is the maximum routine
inspection interval under current NBIS?
A. 12 months for all prestressed concrete bridges.
B. 24 months is the maximum unless an approved risk-based policy permits extension up to 48 months for low-risk structures.
C. 48 months is automatic for any structure with condition rating 7 or higher.
D. 60 months is permitted if the bridge is less than 20 years old.
Correct Answer: B
Rationale:
NBIS sets a 24-month maximum for routine inspections. Risk-based policies may extend the interval to 48 months for qualifying low-risk
structures.
NHI SAFETY INSPECTION OF IN-SERVICE BRIDGES FINAL EXAM | 2026/2027 Page 4
NHI SAFETY INSPECTION OF IN-SERVICE BRIDGES
FINAL EXAM | 147 QUESTIONS | WITH CORRECT
SOLUTIONS!! 2026/2027
A+
Complete Blueprint Coverage • Official Domain Alignment • Verified Rationales
A+ 7 100%
QUESTIONS VERIFIED EXAM DOMAINS COVERED RATIONALES INCLUDED
CATEGORIES
1. Bridge Inspection Fundamentals, Roles & Safety Responsibilities
2. Inspection Equipment, Access Methods & Site Safety Controls
3. Bridge Materials, Defect Recognition & Deterioration Mechanisms
4. Deck, Joint, Bearing & Superstructure Inspection & Evaluation
5. Substructure, Foundations, Culverts, Waterways & Scour
6. Condition Ratings, Element-Level Evaluation, Load Path & Critical Findings
7. Documentation, Reporting, NDE Methods & Inspection Intervals
STUVIAACTUALEXAM
,1. Bridge Inspection Fundamentals, Roles & Safety Responsibilities
Q1
An inspection team leader arrives at a multi-span steel girder bridge over an active rail line. The leader holds a PE license and
18 months of experience but has not completed comprehensive FHWA-approved training. What is required before the leader
may sign the inspection report?
A. PE license alone satisfies NBIS team-leader requirements.
B. Completion of FHWA-approved comprehensive bridge inspection training plus meeting the experience threshold.
C. Eighteen months of experience is sufficient if a program manager co-signs.
D. Only a five-year certified technician may lead railroad-overpass inspections.
Correct Answer: B
Rationale:
NBIS requires both an FHWA-approved comprehensive training course and the defined experience. A PE license does not waive training;
co-signature does not substitute for the team leader's own qualifications.
Q2
During a routine inspection of a continuous concrete box-girder bridge, an inspector finds a sudden 1.5-inch elevation change at
an interior pier that was absent two years earlier. No load restriction is posted. What immediate action is required?
A. Document in the routine report and schedule a special inspection within 90 days.
B. Classify as a critical finding, notify the owner and FHWA per state procedures, and evaluate need for interim load restriction or
closure.
C. Finish inspecting all spans first, then address settlement in the final rating.
D. Re-measure at day's end and average the readings before deciding significance.
Correct Answer: B
Rationale:
Sudden settlement of this magnitude is a potential critical finding that may affect capacity or public safety. Prompt notification and evaluation for
interim action are required; deferral is not acceptable.
Q3
A quality-assurance review shows inspectors routinely omitted secondary members and bracing even when those members
exhibited section loss. What is the primary deficiency?
A. Inspectors correctly prioritize primary members and may omit secondary members when time is limited.
B. Secondary members and bracing are part of the structural system and must be inspected and documented when accessible;
omission violates standards.
C. Secondary-member documentation is required only on fracture-critical structures.
D. Section loss on bracing is never structural and need not be recorded.
Correct Answer: B
Rationale:
BIRM and NBIS require systematic inspection of all structural components, including secondary members. They can affect load distribution and
redundancy.
, Q4
A fracture-critical two-girder steel bridge has fatigue cracks at web-to-flange welds near mid-span. What inspection intensity and
interval apply to the non-redundant tension members?
A. Routine 24-month inspection with photographic monitoring is adequate.
B. Hands-on inspection of the non-redundant steel tension members at intervals not exceeding 24 months, with shorter intervals if
conditions warrant.
C. Ground-based binocular inspection every 48 months is acceptable.
D. Only members with active crack growth need annual hands-on inspection.
Correct Answer: B
Rationale:
NBIS mandates hands-on inspection of nonredundant steel tension members at intervals not exceeding 24 months. Existing fatigue cracks
typically justify closer intervals.
Q5
A team plans a night inspection of a high-traffic urban viaduct to reduce disruption. Night work reduces visibility of defects. What
is the correct decision?
A. Night inspections are prohibited on structures with ADT greater than 10,000.
B. Night inspections may proceed if adequate artificial lighting is provided and the plan addresses visibility limits and safety
controls.
C. All defects are equally visible at night, so lighting intensity is irrelevant.
D. Night work automatically requires an underwater dive team on standby.
Correct Answer: B
Rationale:
Night inspections are permitted when lighting, traffic control, and visibility limitations are properly addressed. Absolute ADT-based prohibitions do
not exist in federal standards.
Q6
A newly hired inspector asks the difference between a routine inspection and an in-depth inspection for a cable-stayed bridge.
What is the correct distinction?
A. Routine inspections always include hands-on examination of every cable; in-depth inspections are limited to deck-level
overview.
B. Routine inspections are regularly scheduled visual examinations of accessible elements; in-depth inspections provide close,
hands-on examination of selected critical components, often with specialized access or NDE.
C. In-depth inspections occur only after a critical finding; routine inspections are annual regardless of condition.
D. The terms are interchangeable under NBIS.
Correct Answer: B
Rationale:
BIRM defines routine inspections as regularly scheduled visual assessments. In-depth inspections involve close examination of critical details
and may use specialized access or NDE.
Q7
A timber-bridge report rates the superstructure 5 even though multiple floor beams show advanced decay and reduced section.
What is the correct QA response?
A. Rating 5 is acceptable because timber bridges are expected to show decay.
B. The rating should be lowered to reflect decay that affects capacity; the report must be revised and the owner notified if capacity
is compromised.
C. Condition ratings are subjective and cannot be challenged by QA.
D. Only the deck rating may be adjusted; timber superstructure ratings are fixed at 5.
Correct Answer: B
Rationale:
Condition ratings must reflect deficiencies that affect structural performance. Advanced decay in floor beams warrants a lower rating and possible
capacity evaluation.
NHI SAFETY INSPECTION OF IN-SERVICE BRIDGES FINAL EXAM | 2026/2027 Page 3
, Q8
A structure built in 1968 was widened in 2019. How should year-built and year-reconstructed be coded under SNBI?
A. Year built remains 1968; year reconstructed is left blank because widening is not reconstruction.
B. Year built is updated to 2019 and the original year discarded.
C. Year built remains 1968 and year reconstructed is coded 2019.
D. Both fields remain blank until a full load rating is performed.
Correct Answer: C
Rationale:
SNBI retains the original year built and records major reconstruction or widening in the reconstruction field, preserving historical data.
Q9
Channel migration has placed the main channel against a previously non-scour-critical pier. What update and follow-up are
required?
A. No change is needed if embedment still meets original design plans.
B. Scour vulnerability must be re-evaluated; the structure may need reclassification and an updated plan of action.
C. Channel migration is outside safety-inspection scope and is handled solely by hydraulic engineers.
D. Only bridges already coded scour-critical require channel-location monitoring.
Correct Answer: B
Rationale:
Significant channel migration that changes flow attack requires re-evaluation of scour vulnerability and possible plan-of-action updates.
Q10
Load-posting signs for a 20-ton restriction are faded and one is missing. What is the inspector's immediate responsibility?
A. Note the condition and recommend replacement in the next maintenance cycle.
B. Report the missing and deficient signing as a critical safety issue requiring prompt correction so the public is warned of the
restriction.
C. Ignore signing deficiencies; they fall under traffic engineering, not bridge inspection.
D. Temporarily raise the posted limit until new signs are installed.
Correct Answer: B
Rationale:
Missing or illegible load-posting signs are a public-safety deficiency that must be reported for immediate correction.
Q11
A simple-span prestressed concrete girder bridge has no known deficiencies and low ADT. What is the maximum routine
inspection interval under current NBIS?
A. 12 months for all prestressed concrete bridges.
B. 24 months is the maximum unless an approved risk-based policy permits extension up to 48 months for low-risk structures.
C. 48 months is automatic for any structure with condition rating 7 or higher.
D. 60 months is permitted if the bridge is less than 20 years old.
Correct Answer: B
Rationale:
NBIS sets a 24-month maximum for routine inspections. Risk-based policies may extend the interval to 48 months for qualifying low-risk
structures.
NHI SAFETY INSPECTION OF IN-SERVICE BRIDGES FINAL EXAM | 2026/2027 Page 4
