Practice Test GeeksACS CCN1 Practice Test

CCN1 Flashcards

158 study cards across 26 topic decks — every card built from a real CCN1 practice question. No account or sign-up needed. Flip to reveal the answer and explanation, mark what you know, and drill what you don't.

CCN1 exam key facts

  • CCN1 is the mandatory core domestic natural gas safety assessment under ACS, it includes Combustion Performance Analysis (CPA1), and it must be passed before appliance assessments such as CENWAT, CKR1 and HTR1. Source
  • ACS CCN1 competence is renewed every 5 years through a re-assessment, which can be shorter than the initial assessment. Source
  • An ACS CCN1 Core Domestic Gas Safety certificate of competency must be renewed every 5 years for a Gas Safe Registered engineer to keep the registration. Source
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🎲 Mixed Deck — All CCN1 Topics
100 cards sampled from every topic · the fastest way to find your weak spots
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Decks by Topic

Gas Appliance Installation and Commissioning
7 cards
Gas Appliance Installation and Commissioning
7 cards
Combustion and Ventilation
6 cards
Combustion and Ventilation
6 cards
Combustion Principles & Flue Systems
6 cards
Combustion Principles & Flue Systems
6 cards
Combustion Principles & Flue Systems
6 cards
Flue Systems and Chimneys
6 cards
Flue Systems and Chimneys
6 cards
Gas Emergency Procedures
6 cards
Gas Emergency Procedures
6 cards
Gas Safety Regulations
6 cards
Gas Safety Regulations
6 cards
Gas Safety Regulations and Legislation
6 cards
Gas Safety Regulations and Legislation
6 cards
Meter and Controls
6 cards
Meter and Controls
6 cards
Pipework and Fittings
6 cards
Pipework and Fittings
6 cards
Pipework Installation & Tightness Testing
6 cards
Pipework Installation & Tightness Testing
6 cards
Purging Procedures
6 cards
Purging Procedures
6 cards
Purging Procedures
6 cards
Unsafe Situations Procedure (RIDDOR)
6 cards
Unsafe Situations Procedure (RIDDOR)
6 cards

What Practice Test Geeks adds beyond an AI chat for CCN1

An AI chatbot can quiz you, but it can't reproduce the exam conditions or keep your record. Here you get:

  • A timed, full-length CCN1 mock exam — 45 questions in 90 minutes with a 80% pass mark, modeled on the official exam's question count and time limit, followed by a score report broken down by exam domain.
  • A fixed CCN1 question bank: the same test every attempt, so your score is comparable from one try to the next instead of changing with every regenerated quiz.
  • Progress saved on your device: completed tests, scores and missed questions stay in My Progress, so you can retake only what you got wrong.
  • A printable CCN1 cheat sheet you can print or save as a PDF.
  • Free CCN1 practice tests with the correct answer shown after each question.
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How this page was made: written with AI tools and published by Nathan Beja, founder of Practice Test Geeks, who is responsible for its content. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy

Sources & references

Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy

  1. igem.org.uk — Eligibility, test delivery, score validity, exam information · verified Nov 2026
  2. niceic.com — Exam format, renewal, retake policy · verified Oct 2026