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NASSCO Pipeline Assessment Certification Program (PACP)
exam, organized by topic with detailed rationales.
The material reflects the current PACP Version 8.0/8.1 standards and has been updated for the 2025 – 2026 exam cycle. Exam Quick Reference
SectionTopicQuestions 1PACP Fundamentals & General Knowledge1–25 2Defect Coding & Classification26–75 3CCTV Inspection & Field Operations76–115 4Data Management, Quality Control & Certification116–150 5Advanced Concepts & Asset Management151–175 6Scenario‑Based & Code Application Practice176–200
SECTION 1: PACP FUNDAMENTALS & GENERAL KNOWLEDGE (Q1–Q25) Q001. What does PACP stand for? A. Pipeline Analysis and Certification Program B. Pipeline Assessment and Coding Protocol C. Pipeline Assessment Certification Program D. Pipeline Accreditation for Condition Professionals
Answer: C Rationale: PACP stands for the Pipeline Assessment Certification Program, which was developed by NASSCO. It is the industry‑wide standard for coding defects observed during CCTV inspections of sanitary sewer pipelines. The name emphasizes both the assessment function and the certification aspect of the program.
Q002. What is the primary purpose of PACP inspections? A. To locate utility conflicts B. To design new pipelines C. To assess the condition of sanitary sewer pipelines D. To measure water flow velocity Answer: C Rationale: PACP is specifically designed to evaluate the condition of existing sewer pipelines using a standardized coding system. It does not address utility conflicts, new pipeline design, or flow measurement, which are separate engineering activities.
Q003. In which year was PACP first launched in North America? A. 1998 B. 2000
A. To increase the cost of pipeline inspections B. To provide a standardized method for coding pipe defects across agencies C. To eliminate the need for CCTV inspections D. To simplify pipe construction methods Answer: B Rationale: PACP was created to standardize CCTV data collection and coding, allowing data to be compared across different systems, projects, and time periods. This standardization enables municipalities and utilities to integrate inspection data into comprehensive asset management programs and make consistent, data‑driven decisions.
Q006. PACP certification is required for which of the following activities? A. Operating a CCTV camera system B. Coding and interpreting pipeline defects from CCTV inspections C. Designing sewer rehabilitation projects D. Installing new sewer pipe Answer: B Rationale: PACP certification is specifically for individuals who code and interpret pipeline defects from CCTV inspections. While camera operation is often part of the job, the certification focuses on the cognitive skill of identifying, coding, and assessing defects according to the PACP manual. Design and installation are outside the scope of PACP.
Q007. The PACP standard is divided into three primary certification modules. What are they? A. Structural, Hydraulic, and Environmental B. PACP, LACP, and MACP C. Inspection, Coding, and Reporting D. Pre‑construction, Construction, and Post‑construction Answer: B Rationale: The PACP standard is part of a family of three certification modules: PACP (Pipeline Assessment Certification Program), LACP (Lateral Assessment Certification Program), and MACP (Manhole Assessment Certification Program). Each focuses on a different component of the collection system: mainline pipes, service laterals, and manholes.
Q008. What is the primary difference between PACP and LACP? A. LACP is used for stormwater only B. LACP is specifically for assessing sewer service laterals C. PACP uses a different numbering system D. LACP does not require certification Answer: B Rationale: LACP (Lateral Assessment Certification Program) is the specialized certification for assessing the condition of service laterals—the pipes connecting individual properties to the main sewer line. PACP covers mainline sewers. Both use similar coding principles but have specific considerations for the smaller diameter and configuration of laterals.
Rationale: PACP guidelines specify a maximum camera travel speed of 30 feet per minute. Exceeding this speed can result in blurred or low‑quality images that prevent accurate defect identification and coding. Slower speeds are often advisable in smaller diameter pipes or when inspecting for fine cracks or joint defects.
Q011. PACP was originally adapted from which United Kingdom coding system? A. British Standard BS 1275 B. WRc Manual of Sewer Condition Classification (MSCC) C. UK Water Industry Sewer Coding Protocol D. ISO 13254 Sewer Assessment Standard Answer: B Rationale: PACP codes adopted in 2002 for North America were based on a system developed by the Water Research Centre (WRc) in 1980, known as the Manual of Sewer Condition Classification (MSCC). While the starting point was MSCC (3rd Edition, 1993), WRc had planned improvements for the 4th edition that were incorporated into PACP.
Q012. PACP uses a condition grade scale from _____ to _____, where _____ is the most severe condition. A. 0 to 5; 5 is most severe B. 1 to 5; 5 is most severe C. 1 to 4; 4 is most severe
D. 0 to 10; 10 is most severe Answer: B Rationale: PACP uses a grade scale of 1 to 5, with 5 representing the most severe defect condition. The grade is automatically determined by the code and the specific information entered with the code (such as percentages or clock positions) based on tables in the PACP manual.
Q013. PACP certification is valid for: A. One year, with an optional one‑year grace period B. Two years, renewable with CEUs C. Three years, with a one‑year grace period for recertification D. Five years, with a mandatory in‑person exam Answer: C Rationale: PACP User certification is valid for a period of 3 years. After expiration, the certified professional is no longer certified but has a 1‑year grace period during which they are eligible to attend a recertification course to reactivate their status without retaking the full training.
Q014. Which of the following is NOT one of the four PACP code families? A. Structural Defects
Q016. The PACP manual recommends starting a CCTV inspection at the _____ and moving to the _____ to ensure consistent data collection. A. Downstream manhole, upstream manhole B. Upstream manhole, downstream manhole C. Mid‑pipe, upstream manhole D. Crown, invert Answer: B Rationale: The standard recommended practice is to start the inspection at the upstream manhole and move downstream. This allows water to flow away from the camera, reducing the risk of debris obscuring the lens and improving image clarity, while also providing a consistent directional reference for defect coding.
Q017. In PACP Version 8.0, the “Observation” data field is used to record: A. The date and time of the inspection B. The PACP certification number of the operator C. Any notable non‑defect information (e.g., standing water level, debris type) D. The GPS coordinates of the manhole Answer: C Rationale: The “Observation” field in PACP Version 8.0/8.1 is intended to capture notable non‑defect information that does not fit into any of the standard code families. This includes standing water level (e.g., “0.2 ft”), debris type (e.g., “sand, gravel, rag”), and other conditions
that may affect the inspection or future asset management decisions. It is not for operator‑ or time‑stamping data.
Q018. What is the primary purpose of NASSCO’s recently published PACP Quality Control (QC) Guidelines? A. To increase the difficulty of the certification exam B. To assess all aspects of a sewer inspection deliverable to ensure data consistency and reliability C. To replace the PACP manual entirely D. To eliminate the need for operator training Answer: B Rationale: NASSCO’s PACP QC Guidelines assess all aspects of a sewer inspection deliverable, including evaluation of the individual PACP‑Certified Professional, the inspection process, the coding accuracy, and the data file itself. The goal is to ensure that the data submitted by a contractor to a client meets the PACP standard and is reliable for asset management purposes.
Q019. In what year did NASSCO’s PACP QC Guidelines begin to see implementation by municipalities, notably in Canada? A. 2019 B. 2020 C. 2022 D. 2023
B. The orientation of a defect around the pipe circumference, with 12 o’clock being the top (crown) C. The GPS timestamp of each defect D. The age of the pipe segment Answer: B Rationale: In PACP, the clock position defines the circumferential location of a defect, with 12 o’clock corresponding to the pipe crown (top) and 6 o’clock corresponding to the invert (bottom). This standardized orientation allows consistent defect location recording regardless of pipe orientation or operator perspective.
Q022. A pipe segment is defined in PACP as: A. A single length of pipe that contains at least one defect B. The entire sanitary sewer system for a municipality C. A continuous length of pipe between two consecutive manholes or access points D. Any section of pipe that has been previously repaired Answer: C Rationale: A pipe segment is defined as the continuous length of pipe between two consecutive manholes (or other standard access points). This definition ensures that data is organized consistently, allowing pipe segments to be easily identified and compared across inspections, projects, and time periods.
Q023. In PACP, what does the “Pipe Material” field classify? A. The age of the pipe B. The type of material the pipe is made from (e.g., VCP, PVC, RCP, HDPE) C. The diameter of the pipe D. The manufacturer of the pipe Answer: B Rationale: The “Pipe Material” field is used to record the type of material the pipe is constructed from, such as Vitrified Clay Pipe (VCP), Polyvinyl Chloride (PVC), Reinforced Concrete Pipe (RCP), High‑Density Polyethylene (HDPE), or others. This information is critical for assessing material‑specific deterioration mechanisms (e.g., corrosion in concrete pipes, cracking in clay).
Q024. What is the recommended distance between the camera lens and the pipe invert for proper calibration and image quality? A. 6 inches B. The camera should be centered in the pipe C. The lens should be positioned approximately one‑third of the pipe diameter from the invert D. The camera should be as close to the invert as possible Answer: C
B. Fractures C. Surface spalling D. Roots Answer: D Rationale: Roots are classified as an Operation & Maintenance (O&M) defect (family 5), not a structural defect (family 4). Roots do not directly compromise the structural integrity of the pipe unless they physically displace or crack it; rather, they obstruct flow and are considered a maintenance issue.
Q027. In PACP coding, the primary difference between a “Crack” (C) and a “Fracture” (F) is: A. Cracks are always longitudinal; fractures are always circumferential B. A fracture is more severe than a crack, typically with missing or displaced material C. Fractures occur only in metallic pipes D. There is no significant difference; the terms are interchangeable Answer: B Rationale: A crack is a fissure with minimal or no material loss, while a fracture is a more severe defect where material is missing or displaced. In the PACP coding matrix, fractures have a higher grade (typically 4‑9 vs. 4‑3 for cracks). Fractures often show visible voids or open breaks.
Q028. What is the correct PACP code for a longitudinal crack in a concrete pipe? A. 4‑ 3 ‑CL B. 4‑ 3 ‑CM C. 4‑ 3 ‑CS D. 4‑ 9 ‑F Answer: A Rationale: 4 ‑ 3 ‑CL is the code for a longitudinal crack (CL = Crack Longitudinal). The “ 4 ” indicates the structural defect family, “ 3 ” represents the Crack group, and “CL” is the descriptor for longitudinal orientation.
Q029. A “Broken” defect (Code 4‑17) is characterized by: A. A hairline crack with no displacement B. A fracture where pieces of the pipe are missing or displaced, creating an opening C. A joint that has separated D. A hole caused by corrosion Answer: B Rationale: A Broken defect is a severe structural condition where pieces of the pipe wall are missing or displaced, creating an opening that allows soil infiltration or exfiltration. It is distinct from a simple crack or fracture because material has been lost from the pipe wall.
Q032. A “Collapse” defect (Code 4‑37) indicates: A. A minor crack with no structural impact B. A complete failure of the pipe wall such that the pipe can no longer convey flow C. A joint that has separated by less than 1 inch D. A deformation less than 5% of the pipe diameter Answer: B Rationale: A Collapse is the most severe structural defect. The pipe wall has completely failed and the pipe can no longer convey flow. It is often associated with advanced deformation, broken sections, or a complete cave‑in. No modifier or grade is needed—the code alone indicates the severity.
Q033. Joint defects (Code 4‑43) can be classified by offset, separation, or angular displacement. The modifier “JOS” stands for: A. Joint open slight B. Joint offset small C. Joint oblique separation D. Joint open severe Answer: B
Rationale: JOS = Joint Offset Small. This is one of the modifiers used to describe the severity of offset (misalignment) at a pipe joint, where the pipes are no longer concentrically aligned. Other modifiers include JOM (offset medium) and JOL (offset large).
Q034. Surface damage (Code 4‑51) is most commonly associated with which pipe material? A. PVC B. HDPE C. Concrete or reinforced concrete pipe (RCP) D. Ductile iron Answer: C Rationale: Surface damage (spalling, aggregate exposure, reinforcement visible) is most common in concrete or reinforced concrete pipe (RCP). Spalling occurs when the concrete cover deteriorates, often due to corrosion of the reinforcing steel or chemical attack (e.g., from hydrogen sulfide).
Q035. A defect code of 4‑ 3 ‑CS indicates a: A. Circumferential crack (single) B. Multiple longitudinal cracks C. Crack that spirals around the pipe D. Huge crack covering more than 50% of the circumference
