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Certified API 570 Piping inspectors Practice Test

API-570 test Format | Course Contents | Course Outline | test Syllabus | test Objectives

Calculations for Evaluating Thickness Measurements, Inspection Intervals, and Piping Integrity
- Corrosion Rates and Remaining Life
- Calculate average corrosion rate using initial and subsequent thickness readings (API 570, 7.1.2).
- Calculate short-term and long-term corrosion rates when multiple measurements exist.
- Determine remaining life based on current thickness, minimum required thickness, and corrosion rate (API 570, 7.2).
- Apply rules for corroded areas and local thin areas.

- Inspection Intervals
- Determine external visual inspection intervals and thickness measurement intervals for Class 1, 2, and 3 piping (API 570, 6.3.3 & Table 1).
- Understand factors influencing interval adjustments (e.g., corrosion rate trends, RBI if applicable).
- Set next inspection date based on remaining life and safety factors.

- Weld Joint Quality Factors (Ej) and Casting Quality Factors (Ec)
- Select weld joint quality factor Ej from ASME B31.3 Table A-1B for different weld types and joint efficiencies.
- Select casting quality factor Ec from ASME B31.3 Table A-1A.
- Increase joint quality factors (up to 1.0) by performing supplemental NDE as per ASME B31.3 Table 302.3.4 (e.g., 100% RT for seamless to welded transitions).

- Internal Pressure / Minimum Thickness Calculations
- Calculate pressure design thickness (minimum required thickness) for straight pipe under internal pressure (ASME B31.3, 304.1.1 and 304.1.2 formulas).
- Determine minimum thickness for permanent blanks (blanks, spectacle blinds) (ASME B31.3, 304.5.3).
- Calculate MAWP of corroded piping, including future corrosion allowance (API 570, 7.5).
- Adjust calculations for corrosion allowance addition/subtraction and mill tolerance.

- Pressure Testing Requirements
- Calculate hydrostatic leak test pressure (ASME B31.3, 345.4).
- Calculate pneumatic leak test pressure (ASME B31.3, 345.5).
- Understand test medium considerations, safety precautions, and acceptance criteria.

Welding and Brazing
- General Welding Requirements
- Understand ASME B31.3 Chapter V rules for welded joints, sizes, restrictions, reinforcement, preheating, PWHT, and inspection.
- Apply API 570 welding rules (which take precedence over B31.3 in conflicts for in-service work).

- Welding Processes, Inspection, and Metallurgy
- Identify common welding processes, advantages/disadvantages, and typical defects (API RP 577 – full coverage).
- Understand weld imperfection acceptance criteria and repair welding.

- Qualification Requirements
- Differentiate essential, nonessential, and supplementary essential variables for WPS/PQR (ASME Section IX).
- Review and qualify Welding Procedure Specifications (WPS), Procedure Qualification Records (PQR), and Welder Performance Qualifications (WPQ/Welder Qualification).
- Understand welder continuity, retesting, and performance essential variables.

Nondestructive Examination (NDE)
- NDE Methods and Procedures
- Understand requirements and techniques for RT, UT, MT, PT, VT, and other methods (ASME BPVC Section V – Articles 1–10, mandatory appendices).
- Know personnel qualification and certification (ASNT SNT-TC-1A or equivalent referenced).
- Interpret NDE results, acceptance criteria, and documentation.

- Application to Piping
- Select appropriate NDE for weld joints, thickness measurements, and defect detection in in-service piping.

Inspection, Examination, and Pressure Testing Practices
- API 570 Core Rules
- Inspection types (external visual, thickness measurement, injection points, deadlegs, auxiliary piping).
- Frequency and extent of inspections (Class 1/2/3 piping).
- Data evaluation, recordkeeping, and CML (Condition Monitoring Location)/TML management.
- Repair, alteration, and rerating procedures (including authorization, documentation, and pressure testing after repairs).

- Piping System Components
- Inspection practices for pipe, valves, fittings, flanges, supports, and special components (API RP 574 – full coverage).
- Identify common degradation modes and inspection techniques for each component.

- Pressure-Relieving Devices
- Inspection, testing, and repair of PRDs (pressure relief valves, rupture disks) (API RP 576 – full coverage).

Material Verification Program
- PMI and Material Control
- Apply PMI techniques, extent, and acceptance criteria for new and existing assets (API RP 578 – full coverage).
- Understand alloy verification, positive material identification methods, and documentation.

Damage Mechanisms (from API RP 571 – specific mechanisms only)
- Common Mechanisms in Piping
- General/localized corrosion (atmospheric, galvanic, soil, microbiologically influenced – MIC).
- Corrosion under insulation (CUI), pitting, crevice corrosion.
- Erosion/erosion-corrosion.
- High-temperature mechanisms: sulfidation, high-temperature hydrogen attack (HTHA), carburization.
- Cracking mechanisms: chloride SCC, caustic cracking/embrittlement, amine cracking, sulfide stress cracking (SSC).
- Other: dew-point corrosion, boiler water/condensate corrosion, oxygen pitting, vibration-induced fatigue, mechanical fatigue.

- Critical Factors and Appearance
- Identify susceptible materials, environments, temperature/pressure ranges, and mitigation strategies for each mechanism.

Additional Supporting Topics
- Flanges and Bolting
- Flange ratings, dimensions, facing, and assembly practices (ASME B16.5).

- Repair Methods
- Post-construction repair techniques (ASME PCC-2 – relevant articles for piping repairs, e.g., welded sleeves, composite wraps).

- General Concepts
- Key terms: MAWP, CML/TML, injection point circuit, deadleg, rerating, alteration vs. repair, fitness-for-service basics.
- Buried piping inspection considerations.
- Overall application of codes to real-world in-service scenarios.

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Question: 32
What is the minimum holding time of SA-106 Grade B, 1 inch thick material?
A. 2.4 hours
B. 2 hours
C. 1 hour
D. not specified
Answer: C
Question: 33
What is the working pressure of a 150 Ib. flange, SA 350 Gr.LF6 CL 1, used at 400°F?
A. 230 psig
B. 200 psig
C. 170 psig
D. 140 psig
Answer: B
Question: 34
What is the minimum class flange that can be used if the material is SA 351 Gr.C F8C, temperature 950?F and
working pressure is 1930 psig
A. 800
B. 900
C. 1500
D. This material can not be used at this temperature
Answer: C
Question: 35
The preheat zone shall extend beyond each edge of a pipe weld
A. 1�
B. 2�
C. 2T
D. 3T
Answer: A
Question: 36
What is the root face limitation as listed on the attached WPS and PQR
A. 3/32�
B. 1/8�
C. No limit
D. Not designated
Answer: D
Question: 37
If the supporting PQR is used, are the P-no�s correct on the attached WPS?
A. Yes
B. No
C. Could be if properly preheated
D. Not enough information
Answer: B
Question: 38
Is the thickness range on the WPS supported by the PQR?
A. Yes
B. No
C. Re qualification is required by API 570
D. Re qualification is required by ASME Section V
Answer: B
Question: 39
Is the attached PQR properly qualified?
A. No, because RT is not allowed during PQR qualification
B. No, because there are not enough tensile tests
C. No, because peening is allowed by ASME B31.3
D. Yes
Answer: B
Question: 40
What should have been the correct number and type of guide bends on the PQR?
A. 6 side bends
B. 2 face and 2 root bends
C. 1 side, 1 face and 1 root bend
D. No side bends required
Answer: D
Question: 41
According to API 570, a(n) is a person who assists the inspector by performing specific NDE testing.
A. NDE technician
B. Inspector assistant
C. Level II inspector
D. Examiner
Answer: D
Question: 42
More than one contractor, manufacturer or installer may simultaneously qualify a welder. In such case, each
participating organization shall be represented by during the test.
A. A certified welding inspector
B. A responsible employee
C. The welder�s supervisor
D. A welding engineer
Answer: B
Question: 43
Which of the following best describes API 574?
A. code
B. Standard
C. specification
D. Recommended practice
Answer: D
Question: 44
The potential for personnel exposure is deemed to be significant in which fluid service?
A. Category M fluid service
B. High pressure fluid service
C. Normal fluid service
D. Category B fluid service
Answer: A
Question: 45
When an injection point circuit for the purpose of inspection is designated, the recommended up stream limit of the
injection point circuit shall be the greater of ?
A. minimum 12 inches
B. maximum 12 inches
C. three pipe diameters
D. both A and C
Answer: D
Question: 46
can cause flame detectors used to indicate a furnace or boiler fire to provide false indications on control panels.
A. Welding or related repairs on piping
B. Piping alterations in the shop
C. Ultrasonic inspection
D. Radiographic inspection
Answer: D
Question: 47
After application of a non destructive evaluation technique, any resulting evidence is commonly referred to as
A. A crack
B. porosity
C. a leak
D. an indication
Answer: D
Question: 48
API 570 applies to piping systems for process fluids such as:
A. Firewater
B. Plumbing, sanitary sewers and storm sewers
C. Raw, intermediate, and finished products.
D. Piping systems on trucks, ships and barges
Answer: C
Question: 49
Which of the following applies to socket welds in piping systems?
A. Should be avoided
B. Should be used in all welded piping
C. Should be welded using SAW only
D. Should be avoided where crevice corrosion may occur
Answer: D
Question: 50
Each piece of magnetizing equipment shall be calibrated
A. at the beginning of each shift
B. at least once a year or whenever the equipment has been subject to major electrical repair
C. whenever the technician feels like it
D. at least once every 90 days
Answer: B
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