Shotcrete Nozzleman (Dry-Mix) Pass Rate 2026: What the Data Shows

Why There Is No Published Pass Rate

Candidates searching for the pass rate of the ACI shotcrete nozzleman certification usually want one number. The honest answer is that ACI does not publish a verified pass rate for the dry-mix credential, and neither do the sponsoring groups that administer testing. Third-party sites sometimes quote figures with no source, no sample size, and no testing period. This article does not repeat them, because an invented percentage would tell you nothing about your own odds.

What the public record does provide is the structure of the exam: the passing thresholds, the failure conditions on the practical, the experience requirements, and the sponsor rules. Those are the real determinants of who passes. Understanding them lets you estimate your readiness far better than any headline statistic could.

What "Passing" Actually Means for This Credential

Unlike a single-sitting multiple-choice test, this certification has three pass/fail hurdles: a written examination and a two-part performance examination. A candidate must complete the written exam and both performance parts within one year. Failing any single element does not erase the others, but the one-year window means a failed practical that is not retaken promptly can put your whole attempt at risk.

Because the credential is a composite, "pass rate" is ambiguous even in principle. A figure for the written test alone would say little about the practical, and vice versa. For the exact thresholds, see the Shotcrete Nozzleman (Dry-Mix) passing score guide.

The Written Exam: 75% on a Closed-Book Test

The written examination is closed book, allows 90 minutes, and contains between 60 and 90 questions. ACI's policy permits true/false or multiple-choice items, while the sponsor's program page describes multiple-choice questions. No single exact question count is assigned within that range, so do not plan around a fixed number. Candidates must score 75% to pass.

Testing runs through ACI-approved sponsoring groups and examiners. The American Shotcrete Association is a delivery sponsor, not the issuer. ASA's program page also lists a Prometric option for the English written examination, while the practical remains a separate event. The written component is where classroom preparation pays off, and it is the part of the exam that rewards structured study of all ten knowledge areas.

Because no weights are published, treat every area as testable. A walkthrough of each is in the complete guide to all 10 content areas.

The Performance Exam: Where Candidates Really Fail

For many candidates, the practical is the real test. The performance examination is closed book and requires vertical dry-mix placement; overhead placement is an additional certification orientation. It has two parts, and each has its own failure mode.

Part I: The Workmanship Checklist

An examiner scores your technique against a checklist, and you need at least 75%. Dry-mix work gives plenty of ways to lose points that have nothing to do with theory: poor nozzle control, wrong nozzle distance or angle, inadequate water adjustment at the nozzle, failure to encapsulate reinforcement, excessive rebound left in the work, and weak communication with the crew. Candidates who have read a great deal but placed little material often find this part humbling.

Part II: The Cores

After placement, five cores are evaluated. This is where voids, laminations, and poor consolidation behind reinforcement show up. A beautiful surface does not protect you from a bad core.

Five-Core Grading, Explained Correctly

The core rule is commonly misquoted, so it deserves precision. Five cores are evaluated. The performance examination fails when:

• Any single core is graded above 3, or
• More than two cores receive a grade of 3.

That means one core at grade 3 is survivable, and two cores at grade 3 are survivable, but three is a fail. Any core worse than grade 3 is an automatic fail regardless of how the other four look. Candidates sometimes mistake this for an average, which it is not. A single bad core defeats the attempt, and that is exactly why consistent technique at the reinforcement matters more than a good overall appearance.

The Experience Gate That Filters Candidates First

Before anyone sits an exam, they must clear the experience requirement, which screens out the least prepared candidates before they ever reach a testing session. ACI imposes no specific education prerequisite, but it does require verified work experience.

Be careful with the 500-hour figure: it does not mean all 500 hours must be direct hand-nozzling. Only 200 of them must be. A trainee who later accumulates 475 qualifying hours can upgrade, but only for the remainder of the original certification term. Certification lasts five years. For a complete eligibility walkthrough, read the requirements and prerequisites guide.

The practical consequence for pass-rate thinking is that the candidate pool is self-selecting. People who test have already logged substantial time on the nozzle, which is a different population from a general exam cohort and one reason a generic pass-rate figure from another credential would be meaningless here.

Sponsor Mechanics That Affect Your Odds

Where you test shapes your preparation. ASA, as a sponsor, adds its own rules on top of ACI's. ASA requires its education or refresher training for initial certification and recertification, subject to stated retest and orientation-addition exceptions. Those are sponsor requirements, separate from ACI's education and experience rules.

Budgeting by Component

ASA's currently linked fee file, dated December 2024, lists component charges rather than an all-inclusive price. For ASA members and non-members respectively, the listed components are:

These are not a national candidate fee. Session, equipment, materials, coring, and other applicable costs must be budgeted separately, and who pays them (you or an employer) varies. This matters to pass-rate planning because a failed practical that requires a retest carries real cost. The certification cost breakdown explains how to build a realistic budget.

The Renewal Discrepancy

Renewal is a place where sponsor and issuer figures diverge. ACI's route for renewal requires the then-current written and performance examinations plus applicable experience, or an eligible structured-interview-plus-performance route. For the interview route, ACI requires prior certification in the same process issued within six years and at least 500 work hours in the preceding two years, including 100 in each process and orientation sought.

The ASA sponsor policy effective April 2025 still states 1,000 hours for its renewal written-examination waiver. These two thresholds are not identical, and you should not treat the ACI 500-hour figure and the ASA 1,000-hour figure as interchangeable. Confirm the sponsor's applicable requirement before you book a renewal session.

A Domain-Ordered Readiness Plan

Since no weighted blueprint exists, sequence your preparation by dependency rather than by percentage. Foundation topics make later ones easier. For the written exam, the paid CP-60 Shotcreter Craftsman Workbook (fourth edition, which includes CCS-4, Shotcrete for the Craftsman) is the courseware the program links; the public Job-Task Analysis document is useful for seeing what the exam objectives cover but is not a substitute for the workbook.

This sequence is a template; adjust it to your own hands-on experience. If you already have strong nozzle time but weak technology fundamentals, spend more of your hours on the first two weeks. The first-attempt study guide covers study approaches in more depth, and the one-page cheat sheet is useful for last-minute review.

Original Practice Questions With Explanations

The following are original practice items written for study, not leaked exam content. Marketplace "answer sets" sold online are not authenticated examination material, and relying on them is risky. For more original practice, use the main practice test site.

For more practice across all ten knowledge areas, take advantage of the full practice test.

Frequently Asked Questions