Shotcrete Nozzleman (Dry-Mix) Passing Score 2026: Exactly What You Need to Pass

Which Credential This Passing Score Applies To

Before talking numbers, it is worth pinning down exactly which credential we mean, because the shotcrete industry has changed the name of this certification and several other programs sound similar. This article covers the American Concrete Institute (ACI) credential historically called the ACI Shotcrete Nozzleman (Dry-Mix Process). ACI's current official title for it is Shotcreter (Dry-Mix Process). The trade magazine coverage of the rename, including a 2025 profile of the first female ACI-certified nozzleman in Shotcrete magazine, confirms the nozzleman-to-shotcreter transition. The exam content did not become a different credential because of the new label; the legacy name simply persists in job postings, crew conversations and search queries.

Three boundaries matter for scoring:

• Dry-mix only. This is not the wet-mix credential. Wet-mix and dry-mix are separate certification tracks, and the passing standards discussed here belong to the dry-mix process.
• Full certification, not trainee. Shotcreter-in-Training is a separate, vertical-only credential with a lower experience threshold. We compare the two later, but the scoring discussion here targets the full credential. For a broader orientation, see What Is Shotcrete Nozzleman (Dry-Mix) Certification?
• ACI issues, sponsors deliver. ACI is the governing body and credential issuer. Testing runs through ACI-approved sponsoring groups and examiners. The American Shotcrete Association (ASA) is a delivery sponsor, not the issuer.

If you are still confirming whether you qualify to sit for the exam at all, read Shotcrete Nozzleman (Dry-Mix) Requirements 2026 first, then return here for the scoring detail.

The Written Examination: 75% and What That Means

The written component is the part most candidates picture when they ask about a "passing score." The published parameters are straightforward:

What 75% looks like in practice

Because the question count is a range rather than a single number, the exact count of questions you must answer correctly depends on your exam form. The sponsor materials do not assign one exact count within the 60-90 range. As simple arithmetic only: on a 60-question form, 75% corresponds to 45 correct answers, and on a 90-question form it corresponds to 68 (rounding 67.5 up). Treat those figures as illustration rather than a published cut-score table, and confirm your session's form details with your sponsor.

The practical takeaway is that you can miss roughly one question in four and still pass the written exam. That sounds forgiving until you remember the exam is closed-book and spans ten distinct knowledge areas. A candidate who is excellent on equipment and placement but weak on testing, curing and environmental precautions can burn through that margin quickly. For a candid look at how that margin feels to candidates, see How Hard Is the Shotcrete Nozzleman (Dry-Mix) Exam?

The Performance Examination: Two Parts, Two Different Standards

The performance exam is also closed-book and requires vertical dry-mix placement. Overhead placement is an additional orientation, available as an add-on certification. The performance examination is split into two parts, and they are graded differently, which surprises many first-time candidates who expect a single percentage.

The two parts test different skills. A candidate can pass the checklist through disciplined technique and still fail the core evaluation if the in-place quality is poor, and the reverse is also possible. That is why practicing only to look good on the checklist is a mistake.

How the Five-Core Grading Rule Actually Works

The five-core rule is the most frequently misquoted piece of this exam, so read it carefully. The performance exam fails when any core is graded above 3, or when more than two cores receive grade 3. Those are two independent failure triggers:

1. Any single core graded above 3 fails the exam. One badly consolidated core with voids, sand pockets or poor encapsulation is enough.
2. More than two cores at grade 3 fails the exam. You may have up to two grade-3 cores among the five; a third grade-3 core triggers failure even if no core exceeds 3.

Put another way, a passing result requires every core to be graded 3 or better, with no more than two of the five sitting at grade 3 exactly. The rest need to grade better than 3. Check your sponsor's grading guide for the precise grade definitions, since this article does not reproduce the grading scale itself.

What drives core quality in dry-mix work? The same fundamentals the written exam tests: correct water control at the nozzle, proper nozzle distance and angle, controlled rebound and overspray management, clean surface preparation, and full encapsulation of reinforcing bars. Rebound trapped behind bars is a classic cause of poor cores. The hands-on skills and the written knowledge reinforce each other, which is why the complete guide to all 10 content areas is useful for the practical side too.

What Is Not Published: Pass Rates, Item Counts and Score Reports

A responsible discussion of passing scores has to include what is not publicly established. From the public program materials:

• No official pass rate. The program documents do not publish a pass rate for the dry-mix exam. Any specific percentage you encounter on a third-party site is unverified. Our own Shotcrete Nozzleman (Dry-Mix) pass rate article explains how to think about this gap honestly.
• No single exact question count. The 60-90 range is the published parameter. Your session's form determines the actual count.
• No percentage-weighted domain blueprint. The ten knowledge areas are official headings supported by ACI's job-task analysis, but they are not published with percentage weights. Any chart showing "Domain 5 is 30% of the exam" is a guess, not an official allocation.

The last point matters most for strategy. Because the headings are unweighted, you cannot responsibly skip a domain on the theory that it counts for little. Preparation should cover all ten areas.

Turning a 75% Standard into a Domain Plan

The ten official knowledge areas are: Basic concrete technology; Shotcrete Equipment; Environmental conditions and precautions; Inspection and preparation of surfaces; Shotcrete placement, principles, and techniques; Communication; Finishing and tolerance controls; Safety; Testing/quality; and Curing. Since 75% is the bar and weights are unpublished, the sensible plan is to build breadth first, then deepen the areas that also drive your practical score.

This is the one place where a structured calendar helps. Here is a dry-mix-specific sequencing logic, not a generic template:

Place Weeks 1 and 3 early on purpose: concrete technology underlies nearly everything, and placement technique is where written knowledge converts into core grades. Our first-attempt study guide expands this into a fuller preparation route, and you can pressure-test your recall with the Shotcrete Nozzleman (Dry-Mix) practice test as you complete each block.

Topics that quietly decide close results

• Water control. In dry-mix, the nozzleman adds the water at the nozzle, so water adjustment is a core skill both written and practical.
• Rebound and overspray. Know what they are, why they matter, and how they threaten encapsulation and in-place quality.
• Reinforcement encapsulation. A repeating theme: bars must be fully surrounded, with no shadowing voids behind them.
• Environmental precautions. Temperature, wind and moisture conditions affect placement and curing decisions.
• Testing/quality and curing. Often under-studied because they feel "after the work," but they are named exam areas.

Sponsor Mechanics That Affect Your Attempt

Your passing score is only as useful as your ability to get a clean attempt. Sponsor mechanics shape that, and they are not identical across sponsors.

ASA's published fee file (December 2024) lists component charges in USD, shown here as ASA-member / non-member. These are components, not an all-inclusive national candidate fee:

Session, equipment, materials, coring and other applicable costs must be budgeted separately, so the real total depends on how your session is organized and who is paying for it. For a fuller breakdown, see Shotcrete Nozzleman (Dry-Mix) Certification Cost 2026. For session timing and deadlines, see Exam Dates 2026.

Two sponsor-side rules also bear on how you prepare. First, ASA requires its own education or refresher training for initial certification and recertification, subject to stated exceptions such as retests and orientation additions. That is a sponsor requirement, separate from ACI's education and experience rules. Second, the primary study text linked by the program is the fourth-edition CP-60 Shotcreter Craftsman Workbook, available in English and Spanish, which includes CCS-4, Shotcrete for the Craftsman. We have not reproduced its contents here, and the public job-task analysis is not a substitute for the workbook itself.

Trainee Versus Full Certification: Same Exam Standards, Different Hours

Candidates frequently confuse the trainee credential with full certification. The difference is mostly about verified experience and orientation, not a lower exam bar described here:

Note that the 500 hours for full certification are not all required to be direct hand-nozzling; the direct hand-nozzling minimum is 200 hours. ACI imposes no specific education prerequisite. The trainee path is covered in more detail in Shotcrete Nozzleman (Dry-Mix) Training.

Renewal: Passing Again Rather Than Passing Once

Certification lasts five years. When it is time to renew, you generally face the then-current written and performance examinations plus applicable experience requirements, or an eligible structured-interview-plus-performance route. The interview route 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.

Be aware of a sponsor discrepancy. ACI's interview-route threshold is 500 hours, but ASA's sponsored certification policy (effective April 2025) still states 1,000 hours for its renewal written-examination waiver. These are not interchangeable numbers. Confirm which requirement your sponsor applies before you book, rather than assuming the lower figure.

Frequently Asked Questions

For a quick-reference companion to the numbers above, see the one-page cheat sheet of must-know facts, and if you are weighing whether to commit the time and fees, read Is the Certification Worth It? before you book.