- The Number: 62 of 75
- What 62 of 75 Actually Means
- Five Domains, No Published Weights
- Exam Format and Testing Conditions
- The Approved-References Trap
- Planning Your Preparation Around the Cut Score
- If You Miss the Mark: Retest Waiting Periods
- After You Pass: Keeping the Credential Active
- Frequently Asked Questions
- The written FHPT-T exam has 75 scored questions, and you need 62 correct answers to pass.
- ICB publishes five unweighted exam areas, so every domain deserves study time.
- Retest waits are 30, 60, then 90 days after the first, second, and third-or-later failures.
- Confirm approved ASHRAE 110 and 111 editions with ICB before buying any reference material.
The Number: 62 of 75
If you are preparing for the Fume Hood Performance Testing Technician (FHPT-T) examination, the first question is usually the simplest one: what score do I need? The answer from the ICB Certification Manual (Version 241024) is direct. The written exam contains 75 scored questions, and a candidate must answer 62 correctly to pass.
The FHPT-T credential is issued by the Sheet Metal Industry International Certification Board (ICB), with examination administration through the National Energy Management Institute Committee (NEMIC). It is not a NEBB examination and not another ICB scheme, so numbers and rules you may have seen for other certifications do not transfer. This article covers only what the ICB manual states for the FHPT-T.
What 62 of 75 Actually Means
Sixty-two correct out of seventy-five means you can miss at most 13 questions and still pass. Expressed as a share of the exam, that is roughly 83 percent correct, which is a meaningful bar for a technical field credential. Because this is simple arithmetic on the published figures, it is safe to use as a planning target. It also helps to separate what the official sources state from what they leave out.
| Item | What ICB Publishes |
|---|---|
| Scored questions | 75 |
| Correct answers required to pass | 62 |
| Maximum questions you can miss and still pass | 13 (derived from the two figures above) |
| Domain-level percentage weights | Not supplied; the five domains are listed unweighted |
| FHPT-T-specific numeric exam timer | Not verified in the retrieved public sources |
| Candidate fee | Not verified in the retrieved public sources |
Treat the unverified rows honestly. If a third-party site quotes a precise time limit or a dollar fee for this exam, check it against ICB or your JATC coordinator before relying on it. For a broader look at how the cost side is generally structured, see our FHPT-T certification cost breakdown.
Five Domains, No Published Weights
The ICB manual lists five Knowledge Base exam areas for the FHPT-T on PDF pages 43-45. They are presented as plain lines, without percentage allocations. That has a practical consequence: you cannot safely skip any domain on the theory that it is "only a small slice" of the exam, because no official source tells you how many of the 75 questions each domain carries.
Domain 1: Definitions
Expect vocabulary and concepts that the rest of the exam assumes you already own.
- Know the terms used in fume hood performance testing precisely, since wording differences can separate a right answer from a wrong one.
- Be able to distinguish related concepts rather than recognize them loosely.
Domain 2: Instrumentation and Equipment
Tools used to test hoods and the conditions under which they are appropriate.
- Understand what each instrument measures and why it is chosen.
- Pay attention to the standards cited for instrumentation, which is where the edition question described below arises.
Domain 3: Test Conditions
The setup requirements that must be in place before any measurement is meaningful.
- Know what conditions must be established and verified before testing begins.
- Understand how conditions affect whether results can be trusted.
Domain 4: Flow Visualization and Velocity Procedure
The procedural domain covering how airflow behavior and face velocity are observed and measured.
- Be fluent in the sequence of the procedure, not just the definitions.
- Be ready to interpret what an observation indicates about hood performance.
Domain 5: Tracer Gas Test Procedure
The containment-focused procedure that uses tracer gas to evaluate hood performance.
- Know the procedure end to end, including setup and the logic of the measurements.
- Understand how results are interpreted against the test method's framework.
For a deeper breakdown of what each area covers, read our complete guide to all five FHPT-T exam domains. For a sense of how demanding the material is in practice, see how hard the FHPT-T exam is.
Exam Format and Testing Conditions
The written examination is administered by ICB-designated proctors, either online or on paper, in one sitting at designated sites. A few rules from the manual shape how you should prepare:
- One sitting. You complete the exam in a single session, so stamina and pacing matter.
- Approved references only. Only ICB-approved reference materials are permitted in the exam.
- Electronic devices have limits. A device may display approved references, but it may not be used to communicate, copy, or share exam material.
- The one-year window is not a timer. After your application is approved, you have one year to complete the written exam. That is an administrative window, not the length of the exam itself.
Eligibility comes first. Candidates need an ICB-certified TABB Technician credential plus Section 3.2 technician eligibility, which includes NEMIC contribution, collective-bargaining, and specified employment-exception routes. Do not assume it reduces to one universal employment requirement. Our FHPT-T requirements guide walks through the qualifying paths, and our FHPT-T exam dates and scheduling article covers the practical side of getting a seat. Eligible applicants coordinate scheduling with their JATC coordinator through the process described on the ICB New Certification page.
The Approved-References Trap
Because only approved references are allowed, the references you study from should match the references you will be permitted to use. This is where the FHPT-T has a documented wrinkle worth taking seriously.
Within the ICB materials, the FHPT-T guiding list cites ANSI/ASHRAE 110-1995 and 111-2008, but the instrumentation subsection cites 111-1988. The sources conflict, and nothing in them resolves it for you.
Key Takeaway
Before purchasing any standard, confirm the approved editions directly with ICB. Do not silently substitute a newer edition because it looks more current. A newer standard may differ in ways that matter on an exam written against a specific edition, and an unapproved edition may not be permitted in the room.
This single step can protect both your money and your score. A candidate who studies from the wrong edition can lose points on questions that hinge on edition-specific language, even while "knowing the material" in a general sense.
Planning Your Preparation Around the Cut Score
With 13 permitted misses and no published domain weights, the sensible strategy is breadth first, then depth where you are weakest. Practice-test performance is the most useful signal. If you routinely land well above 62 out of 75 on realistic practice questions, you are in a safe zone; if you hover near the line, one bad domain can sink you. You can build that signal with the question sets on our FHPT-T practice test site.
Because the procedures in Domains 4 and 5 are sequential, and Domains 1 through 3 supply the vocabulary and setup logic those procedures rely on, a sensible order mirrors the exam's own order:
Definitions and Instrumentation
- Lock down terminology so later procedures make sense.
- Confirm approved standard editions with ICB before buying references.
- Match each instrument to what it measures.
Test Conditions
- Study what must be established before any measurement counts.
- Connect conditions to the validity of results.
Flow Visualization, Velocity, and Tracer Gas Procedures
- Rehearse each procedure in sequence until you can narrate it.
- Take timed practice sets and review every miss by domain.
Our FHPT-T study guide expands on this approach, and the FHPT-T cheat sheet is a handy final-week review of must-know facts.
If You Miss the Mark: Retest Waiting Periods
Falling short of 62 is not the end of the road, but the manual does impose waiting periods that make a failed attempt costly in time:
| Attempt Outcome | Waiting Period Before Retest |
|---|---|
| After the first failure | 30 days |
| After the second failure | 60 days |
| After the third and subsequent failures | 90 days |
These waits grow with each unsuccessful attempt, which is a strong argument for being genuinely ready before you sit. Use the waiting period productively: review the domains where your practice scores lagged, recheck that your references match approved editions, and retake full-length practice sets until you clear the cut score with room to spare. Keep the one-year application-approval window in mind as well when planning retests. For broader context on outcomes, see what the data shows in our FHPT-T pass rate article.
After You Pass: Keeping the Credential Active
Passing the exam is the milestone, but the credential has a lifecycle. Certification lasts two full years from the last day of the quarter in which it was awarded. Renewal requires continued eligibility, conduct compliance, and four acceptable technician CEUs earned during the certification period. One ICB CEU equals one training hour, and four total can renew multiple technician certifications, which is useful if you hold more than one.
The current ICB Certification Manual controls these rules, with the ICB renewal page and the linked CEU information corroborating the details. If you are weighing whether the effort pays off, our analysis of whether the FHPT-T is worth it and our FHPT-T salary guide are good next reads.
Frequently Asked Questions
The written exam has 75 scored questions, and you must answer 62 correctly to pass. That means you can miss no more than 13 questions.
ICB lists the five domains (Definitions; Instrumentation and Equipment; Test Conditions; Flow Visualization and Velocity Procedure; Tracer Gas Test Procedure) without official percentage allocations. Because no weights are published, prepare for all five rather than guessing which ones count most.
The application-approval window for completing the written exam is one year. That is an administrative deadline, not a time limit within the exam. An FHPT-T-specific numeric exam timer was not verified in the public sources retrieved, so confirm it when you schedule.
The waiting period is 30 days after your first failure, 60 days after the second, and 90 days after the third and any subsequent failures.
The ICB materials conflict: the guiding list cites ANSI/ASHRAE 110-1995 and 111-2008, while the instrumentation subsection cites 111-1988. Confirm the approved editions with ICB before purchasing, and do not silently substitute newer standards.
Certification lasts two full years from the last day of the quarter in which it was awarded. Renewal requires continued eligibility, conduct compliance, and four acceptable technician CEUs earned during the certification period, where one CEU equals one training hour.