Class F
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Cheat sheet
Keep the key ideas within reach.
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ExploreCommon mistakes
Understand the traps and how to avoid them.
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Prepare for the day ahead.
ExploreAbout this exam
The Class F credential is a licensing category used for a defined scope of trade or technical work, and this page is an independent study resource for candidates preparing for that licence. It suits people entering the field who need a first licence, as well as experienced workers moving into a role that requires formal certification. Because no authoritative source was supplied when this page was prepared, the domain list and weightings shown here are provisional and should be checked against the official licensing body before you rely on them for study planning. The exam content is organised into five broad areas: regulations and licensing requirements, safety practices and procedures, equipment and system components, installation and maintenance, and inspection, testing, and troubleshooting. Preparation works best in layers. Start by reading the governing regulation and licensing rules directly, since those underpin both the compliance questions and much of the safety content. Then build vocabulary for components and systems so that installation and troubleshooting questions read clearly. Finish with scenario practice: trace a fault, choose a test, interpret a reading. Candidates who only memorise definitions tend to struggle with questions that ask what to do next on a job. Confirm all administrative details with the official body.
What you'll study
About Class F preparation
What does the Class F exam actually test?
It tests whether you can work safely and legally within the scope of the licence. Expect regulation and licensing rules, safety procedures, component and system knowledge, installation and maintenance practice, and fault-finding. Questions are usually applied rather than purely definitional, so you need to reason about a situation, not just recall a term.
How many questions are on the exam and how long do I get?
Those figures are set by the licensing authority and change from time to time, so this page does not quote them. Check the official body's current candidate handbook or exam outline for the question count, time allowance, and any section-level timing rules before you plan your pacing strategy.
What score do I need to pass, and what does it cost?
Passing scores and fees are published by the official licensing body and are not stated here, because no authoritative source was available when this page was written. Look up the current fee schedule and passing standard on the official site, and confirm whether your fee includes a retake or is charged per attempt.
How hard is the exam in practice?
Most candidates find the regulation and safety sections manageable with careful reading, while troubleshooting scenarios cause the most trouble. Difficulty depends heavily on your background: someone with field experience often finds the practical sections easier but underestimates the code and licensing detail. Budget study time for the areas furthest from your daily work.
If I fail, can I retake it, and how soon?
Retake rules, waiting periods, and any limit on the number of attempts are set by the licensing authority, so confirm them directly with the official body rather than assuming. In practice, candidates who fail usually benefit from reviewing their score report by section before rebooking, so the next attempt targets the weak area.
What is the most common reason candidates fail?
Under-preparing the regulatory content is the classic mistake. People study the hands-on material they enjoy and skim the licensing rules, then lose easy marks. A second common failure is misreading scenario questions that ask for the next safe step rather than the final fix. Slow down and read what is actually being asked.
In what order should I study the five domains?
Start with regulations and licensing, because the rules frame everything else and appear throughout the exam. Move to safety, then components and systems, then installation and maintenance. Leave inspection, testing, and troubleshooting for last, since those questions assume you already know the equipment and the safe procedures.
How should I use practice questions while studying?
Use them as a diagnostic, not a memorisation drill. Work a small set untimed, mark why each wrong option is wrong, and note which domain the miss belongs to. Then study that domain before returning to timed sets. Tracking misses by domain is far more useful than counting your overall percentage.
Is this page affiliated with the licensing body?
No. This is an independent study resource and is not endorsed by, affiliated with, or operated by any licensing authority. Always treat the official body's published handbook, regulation text, and notices as authoritative, especially for fees, scheduling, eligibility, retake policy, and licence validity. Where this page and the official source differ, follow the official source.