PracticeVideosBlogFlashcardsEspañol
All Practice Exams

100+ Free SC Pressure and Process Piping Practice Questions

Prepare for the South Carolina Pressure and Process Piping Contractor Examination exam with instant access — no signup required.

✓ No registration✓ No credit card✓ No hidden fees✓ Start practicing immediately
100+ Questions
100% Free

Loading practice questions...

Same family resources

Explore More South Carolina CLB Commercial Contractor Examinations

Continue into nearby exams from the same family. Each card keeps practice questions, study guides, flashcards, videos, and articles in one place.

South Carolina Air Conditioning Contractor Examination

Practice Questions

South Carolina Alarm Code of Laws Examination

Practice Questions

South Carolina Asphalt Paving Contractor Examination

Practice Questions

South Carolina Boiler Installation Contractor Examination

Practice Questions

South Carolina Bridges Contractor Examination

Practice Questions

South Carolina Burglar Alarm Contractor Examination

Practice Questions
2026 Statistics

Key Facts: SC Pressure and Process Piping Exam

50 Q

Official Exam Questions

PSI SC Commercial Contractor CIB updated 5/15/2025

70%

Passing Score

PSI SC Commercial Contractor CIB updated 5/15/2025

2 hours

Time Allowed

PSI SC Commercial Contractor CIB updated 5/15/2025

USD 75

PSI Exam Fee

PSI SC Commercial Contractor CIB updated 5/15/2025

Open Book

Book Policy

PSI SC Commercial Contractor CIB updated 5/15/2025

South Carolina Pressure and Process Piping Contractor Examination is the official CLB/PSI open-book exam: 50 questions, 70% (35 of 50), 2 hours, USD 75 (bulletin updated 5/15/2025). Official delivery is English.

Sample SC Pressure and Process Piping Practice Questions

Try these sample questions to test your SC Pressure and Process Piping exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which description matches the 6G pipe-welding qualification position?
A.The pipe is rolled on a horizontal axis so the puddle stays in the flat position
B.The pipe stands vertical and the groove is welded as a horizontal bead around the circumference
C.The pipe is fixed with its axis at 45 degrees and is not rotated while the welder works all around the joint
D.The pipe is fixed horizontally and only the top quadrant is welded
Explanation: In 6G the pipe axis is set at about 45 degrees and the joint is locked. The welder must complete flat, vertical, horizontal, and overhead portions of the same groove. That is why a 6G coupon is the usual all-position pipe test referenced in Modern Welding and in field qualification practice.
2What is the 5G pipe-welding position?
A.Pipe axis horizontal and fixed; the welder travels around the joint through overhead, vertical, and flat positions
B.Pipe axis horizontal and rolled so every pass stays flat
C.Pipe axis vertical and fixed with a single horizontal weld
D.Pipe axis at 45 degrees and rolled toward the operator
Explanation: In 5G the pipe lies horizontal and cannot be rotated. The welder must work overhead at the bottom, vertically on the sides, and flat on top of the same groove. Most installed process lines are field-welded in 5G because the spool cannot be rolled in place.
3Why is an E6010 electrode commonly selected for the open-root pass on carbon-steel process pipe?
A.It is a low-hydrogen fill rod that must stay in a holding oven and produces a heavy, slow slag
B.It is a cellulose-covered electrode with a deep, digging arc that can hold a keyhole through an open root
C.It is rated only for fillet welds on galvanized sheet metal
D.It must be used with short-circuit GMAW transfer on AC
Explanation: E6010 is a high-cellulose sodium SMAW electrode used on DCEP. The forceful arc and fast-freezing slag let the welder maintain a keyhole and penetrate an open root. Many carbon-steel pipe procedures then switch to a low-hydrogen electrode such as E7018 for fill and cap.
4How should opened E7018 low-hydrogen electrodes be stored on a process-piping job?
A.In a heated holding oven or rod pot at the temperature required by the manufacturer and the WPS
B.Laid on the ground next to the pipe so they stay at ambient shop temperature
C.Soaked in water to keep the covering flexible
D.Frozen overnight to drive moisture out of the flux
Explanation: E7018 coverings are low-hydrogen and pick up moisture from the air. AWS A5.1 practice and typical WPS rules keep opened rods in a holding oven (commonly about 250°F / 120°C class) so hydrogen stays low enough to avoid underbead cracking. Damp 7018 is a reject condition, not a field fix.
5Before welding a socket-weld joint on B31.1 or B31.3 piping, how far should the pipe be withdrawn from the socket shoulder?
A.The pipe should be jammed hard against the shoulder with zero gap
B.Approximately 1/16 in (about 1.5 mm) to leave an expansion gap
C.1/2 in so the fillet can flow into the socket
D.The full socket depth so the pipe never enters the fitting
Explanation: ASME B31.1 and B31.3 both require an approximate 1/16 in (1.5 mm) gap between the pipe end and the socket shoulder before welding. The gap gives the pipe room to expand as the fillet shrinks, which reduces residual stress and root cracking. The gap is a fit-up dimension; it often closes during welding.
6When making an open-root GTAW butt weld on austenitic stainless process pipe, what is the primary reason to purge the inside of the pipe with inert gas?
A.To cool the weld so interpass temperature never matters
B.To keep the root and heat-affected inside surface from oxidizing (sugaring) and losing corrosion resistance
C.To replace the need for filler metal on every pass
D.To allow E7018 to be used on the root without an oven
Explanation: Stainless roots that see air form a heavily oxidized, sugared ID that is rough and chromium-depleted. An argon (or equivalent) purge excludes oxygen until the root and first fill are complete. The purge is a corrosion-control and quality requirement, not a cooling trick.
7Which polarity is normally used for E6010 open-root SMAW on carbon-steel pipe?
A.DCEN (electrode negative, straight polarity)
B.DCEP (electrode positive, reverse polarity)
C.AC only, with no DC option
D.Three-phase AC from a mill motor
Explanation: E6010 is a cellulose-sodium electrode designed for DCEP (reverse polarity). That polarity gives the digging arc and penetration needed to hold an open-root keyhole. DCEN and AC are the wrong process settings for a typical 6010 pipe-root procedure.
8What is the main purpose of a consumable insert in a GTAW pipe butt joint?
A.To serve as a permanent internal alignment ring that stays in the bore after welding
B.To provide a pre-placed, matching-composition filler at the root so the root reinforcement is uniform
C.To replace the need for any purge gas on carbon steel or stainless
D.To allow the joint to be welded from one side with E7018 only
Explanation: A consumable insert (EB insert, A, J, or similar) is a ring of filler alloy fitted in the root. When fused by GTAW it becomes the root pass and gives consistent ID reinforcement and chemistry. Inserts are common on stainless and alloy process lines where a smooth, repeatable root is required.
9Why do many carbon-steel and chrome-moly pipe WPS documents require preheat before welding?
A.To make the flux on E6010 electrodes wetter
B.To slow the cooling rate, drive off moisture, and reduce the risk of hydrogen-assisted cracking
C.To raise the completed weld above the design temperature so PWHT can be skipped on every alloy
D.To expand the pipe enough that no root opening is needed
Explanation: Preheat raises the metal temperature before the arc starts. Slower cooling, a drier joint, and a lower residual-hydrogen risk are the reasons B31 codes and welding procedures specify a minimum preheat, especially on thick carbon steel and Cr-Mo alloys. The required temperature comes from the WPS, not from a field guess.
10What is the correct way to use tack welds on a process-pipe butt joint?
A.Tacks may be left as-welded even if they are cracked, because the fill passes will cover them
B.Tacks should be made with a qualified procedure, feathered or removed as required by the WPS, and fully consumed or replaced by the root pass
C.Tacks must always be made with a cutting torch so they melt out automatically
D.Tacks are prohibited on every B31.3 joint
Explanation: Tack welds become part of the completed weld. They must be made by a qualified welder using the WPS, and cracked or defective tacks must be removed. Feathering the ends helps the root consume the tack without trapping slag or lack of fusion.

About the SC Pressure and Process Piping Exam

The South Carolina Pressure and Process Piping Contractor Examination is the official CLB classification examination administered by PSI. The official exam has 50 scored questions. Passing is 70% (35 of 50) in 2 hours. The examination is open book. PSI lists USD 75 (Candidate Information Bulletin updated 5/15/2025). Candidates must also pass Business Management and Law for Commercial Contractor. This bank is an English-language MCQ study adaptation. It does not replace required trade experience, board approval, or the official examination.

Assessment

Open-book computer-based multiple-choice. Allowed references include ASME A13.1 (2007), ASME B31.1-2024 Power Piping, ASME B31.3-2024 Process Piping, Facility Piping Systems Handbook (2010), Modern Welding (12th), Pipefitter's Handbook, OSHA 29 CFR 1926, and the South Carolina 811 Excavator Manual.

Time Limit

2 hours

Passing Score

70% (35 of 50)

Exam Fee

USD 75 (PSI Services LLC (for the South Carolina Contractor's Licensing Board))

SC Pressure and Process Piping Exam Content Outline

20%

Joining Methods

Joining Methods (10 items)

14%

Pipe Fitting

Pipe Fitting (7 items)

14%

Safety

Safety (7 items)

4%

Reading Drawings

Reading Drawings (2 items)

10%

Codes

Codes (5 items)

16%

Materials and Components

Materials and Components (8 items)

8%

Process Equipment

Process Equipment (4 items)

4%

Insulation

Insulation (2 items)

6%

Pipe Supports

Pipe Supports (3 items)

4%

Line Labeling

Line Labeling (2 items)

How to Pass the SC Pressure and Process Piping Exam

What You Need to Know

  • Passing score: 70% (35 of 50)
  • Assessment: Open-book computer-based multiple-choice. Allowed references include ASME A13.1 (2007), ASME B31.1-2024 Power Piping, ASME B31.3-2024 Process Piping, Facility Piping Systems Handbook (2010), Modern Welding (12th), Pipefitter's Handbook, OSHA 29 CFR 1926, and the South Carolina 811 Excavator Manual.
  • Time limit: 2 hours
  • Exam fee: USD 75

Keys to Passing

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

SC Pressure and Process Piping Study Tips from Top Performers

1Distribute study time to the official PSI content outline (bulletin updated 5/15/2025)
2Use only the PSI-listed references; temporary tabs such as Post-it notes are prohibited
3Pass Business Management and Law for Commercial Contractor in addition to this technical examination
4This bank is an English-language MCQ study aid, not an official PSI form

Frequently Asked Questions

How many questions are on the South Carolina Pressure and Process Piping Contractor Examination?

The official PSI examination has 50 scored questions. Passing is 70% (35 of 50) within 2 hours (Commercial Contractor Candidate Information Bulletin updated 5/15/2025).

How much does this PSI examination cost?

PSI lists USD 75 for this examination. The South Carolina Contractor's Licensing Board charges a separate USD 350 license application fee for general and mechanical contractor licenses.

Is this examination open book?

Yes. PSI lists the South Carolina commercial contractor examinations as open book. Listed references include ASME B31.1-2024, ASME B31.3-2024, and ASME A13.1 (2007).

Which ASME piping codes are listed?

The PSI bulletin lists ASME B31.1-2024 Power Piping, ASME B31.3-2024 Process Piping, and ASME A13.1 (2007) for pipe identification.