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Oklahoma Process Piping Journeyman — Practice Exam

What This Practice Exam Covers

The Oklahoma Process Piping Journeyman licensing exam is 35 questions answered in 120 minutes, with a 70% passing score (25 correct answers). The exam spans seven topic areas drawn from the Pipefitters Handbook and Pipefitters Dictionary.

This site offers two ways to prepare:

• Free practice exam: 10 questions per attempt, pulled from a limited question pool. You can retake it as many times as you like to get comfortable with the format, question style, and pacing. It costs nothing and no account is required.
• Full practice exam (paid): Mirrors the real exam — 35 questions, 120-minute timer, seven weighted topics. Questions are drawn from a pool of 97+ items, so each attempt produces a different mix. You won't see the same exam twice, which means repeated attempts build genuine knowledge rather than answer memorization.

Start with the free exam to gauge where you stand, then use the full exam for focused preparation.

What You'll Be Tested On

General Knowledge and Definitions — 6 items
This is foundational material that shows up across every other topic. You'll need to know pipe material types (steel, wrought iron, copper, plastic) and how to identify them, including by spark test results from the Spark Tests for Metals section. Pipe schedule designations, the difference between schedule number and weight designations, and dimensional standards for Schedule 40 and 80 pipe are all testable. Conversion factors from the Pipefitters Dictionary, Conversion Factors table appear frequently. Trigonometric function definitions from Pipefitters Dictionary, Solving Problems by Trigonometry are essential — expect to look up or recall sine, cosine, and tangent values. Color coding and labeling of piping systems per the Identification of Piping Systems — Color Identification tables is also covered, including band sizes and legend letter sizing.

Plan Reading — 3 items
Three items means these questions are high-value — you cannot afford to miss them all. You'll interpret pipe bend calculations from drawings and tables, identify fitting laying lengths, and work out offset travel/run relationships directly from plans. Flange and valve specifications, screwed fitting dimensions, and pipe support spacing as shown on plans are also fair game. The key skill is reading tabular data accurately and applying it to a described field condition.

Pipe Materials, Uses, and Properties — 5 items
Expect questions on copper tube Types K, L, M, and DWV — their dimensions and correct applications from the Pipefitters Dictionary copper tube tables. Plastic pipe materials (PVC, polyethylene, ABS, and butyrate) each have specific pressure limits and chemical resistance profiles tested through the Chemical Resistance Comparison Chart — Thermoplastics and the Relative Physical Properties and Cost of Principal Thermoplastics table. Minimum bending radius for standard weight pipe is a direct table lookup from the Pipe Fitters Handbook, Minimum Bending Radius for Standard Weight Pipe table. Thermal expansion calculations using the Expansion of Pipe per 100 Feet table also fall here — see the worked example below for the exact procedure.

Piping Installation and Fitting — 8 items
This is the heaviest topic. Eight items means roughly one in four exam questions lives here. Pipe bend calculations are the core: setback, arc length, and radius relationships for 45°, 60°, and 150° bends drawn from the Setback and Length sections of the Pipe Fitters Handbook. Offset bend travel/run computations for standard angles are tested with both 45° and 60° offsets. Welded fabrication — mitered turns, branch connections, wye layouts — requires knowing the multiplier factors for each turn type and angle (see worked sample below). Butt welding fitting dimensions for elbows, tees, reducers, crosses, and caps, plus screwed and flanged fitting laying lengths, round out this topic.

Hangers and Supports — 5 items
You'll be asked to select correct support spacing for horizontal runs carrying water, gas, or steam from the Spacing of Pipe Supports tables. Plastic pipe has its own spacing requirements — PVC and non-PVC plastics are on separate tables, and temperature affects those intervals. U-bolt dimensions for specific pipe sizes and the differences between hanger types (U-bolt, clevis, saddle, ring) are tested as hardware identification questions.

Valves and Controls — 5 items
Gate, globe, angle, and check valves each have specific service characteristics, operational differences, and installation orientations. Laying lengths for butt welding and flanged connections vary by pressure rating and valve type — the Chapter 1 laying length tables for solid wedge gate valves, swing check valves, and globe/angle valves are all citable sources on this exam. Troubleshooting questions ask you to identify common valve failures and maintenance steps.

Safety — 3 items
These questions cover safe handling during bending and fabrication, proper use of threading equipment from the Threading Pipe section, and hazards from welding, brazing, and soldering. Color coding for piping system content identification also connects safety to the general knowledge material.

Worked Sample Questions

Question 1 — Piping Installation and Fitting

When fabricating a 3-piece 60° welded turn, dimension A (the end straight length) is found by multiplying the radius of the turn by which factor?

• A. .4142
• B. .1989
• C. .2679
• D. .5774

Correct Answer: C — .2679

For a 3-piece 60° welded turn, each of the two mitered joints bisects a 30° segment, making each miter cut at 15°. The end straight length formula is A = Radius × tan(15°), and tan(15°) = .2679. The other options are real multipliers for different configurations: .4142 is the factor for a 3-piece 90° turn, .1989 applies to a 3-piece 45° turn, and .5774 is the setback multiplier for a 60° bend — a different dimension entirely. Mixing up which factor goes with which turn type and which dimension is the most common mistake on this class of question.

Source: Pipefitters Handbook, page 2-9

Question 2 — General Knowledge and Definitions

What is the approximate weight per cubic foot of copper?

• A. 438.7 pounds
• B. 489.0 pounds
• C. 554.7 pounds
• D. 636.5 pounds

Correct Answer: C — 554.7 pounds

This is a direct table lookup from the Pipefitters Dictionary, Weights and Melting Points of Metals table. Copper is 554.7 lb/ft³. The distractors are plausible: 489.0 lb/ft³ is in the range for carbon steel, and 438.7 lb/ft³ is closer to cast iron. Memorizing the approximate weights for copper, steel, and cast iron pays off because the same table is the source for multiple exam items.

Question 3 — Pipe Materials, Uses, and Properties

A 500-foot steel pipeline was installed at 60°F. If 400°F steam is later introduced, what is the approximate total expansion of the line?

• A. 13.98 inches
• B. 10.35 inches
• C. 20.74 inches
• D. 16.23 inches

Correct Answer: A — 13.98 inches

From the Pipe Fitters Handbook, Expansion of Pipe per 100 Feet table: at 400°F, the expansion value for steel is 3.245 inches per 100 feet; at 60°F (the installation temperature), it is 0.449 inches per 100 feet. The net expansion rate is 3.245 − 0.449 = 2.796 inches per 100 feet. Multiply by 5 (for 500 feet): 5.0 × 2.796 = 13.98 inches. The critical step candidates miss is subtracting the baseline installation-temperature value before multiplying by length. Skipping that subtraction produces an inflated answer.

How to Read Your Score

The passing threshold is 70%, meaning you must answer at least 25 of 35 questions correctly on the real exam.

A first practice attempt is a diagnostic, not a verdict. A score in the 50–60% range tells you which two or three topic areas are pulling your total down — that's useful information, not a reason to panic. A score right at 70% on practice is not a comfortable margin; exam conditions, unfamiliar question phrasing, and time pressure can each cost two or three points, so experienced candidates aim for 80% or better on practice before testing.

Use the topic-by-topic breakdown after each full practice attempt. If Piping Installation and Fitting (8 items) is your weak area, that single topic controls nearly a quarter of your total score. Prioritize accordingly. If Hangers and Supports or Valves and Controls are weak, those five-item topics can also swing your result by an entire letter grade. Keep retaking the full practice exam — the 97+ question pool means you're seeing fresh material each time and filling real knowledge gaps, not learning answer patterns.

Where Candidates Lose Points

Wrong table, wrong column. The exam draws from multiple tables with similar structures — support spacing for water versus gas or steam, laying lengths for raised face versus ring joint flanges, copper Type K versus Type L dimensions. Candidates who know the concept but pull from the wrong table still miss the question.

Skipping the baseline subtraction in expansion problems. As shown in the worked sample, thermal expansion questions require subtracting the installation-temperature value from the service-temperature value before multiplying by pipe length. Skipping that step is the single most common calculation error in the Pipe Materials topic.

Mixing up bend multipliers. The Piping Installation and Fitting topic has separate multiplier factors for different turn types, angles, and dimensions (setback versus end straight length versus arc length). Candidates who memorize one or two factors without understanding which dimension each applies to regularly choose plausible wrong answers.

Running out of time on calculations. With 35 questions in 120 minutes, you have about 3.4 minutes per question. Multi-step calculations in the installation and fitting topic can eat five or six minutes if you're not fluent with the tables. Flag calculation-heavy questions and return to them.

Color coding and labeling details. Safety and General Knowledge questions about piping system identification — band sizes, legend letter heights, classification colors — read as easy but are missed when candidates haven't studied the Identification of Piping Systems tables specifically.

Exam Quick Facts