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Zero Drop

Every question written from the regulations and standards, with the clause it comes from.

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The Zero Drop home screen: CCN1, Core domestic gas safety, 418 questions, 30 seen and 29 right last time; CENWAT, Boilers and water heaters, 241 questions, not started; one wrong answer to go back over; a recent CCN1 practice scored 97%

Setting up a Core domestic gas safety practice: All topics, 418 questions, ticked, above Gas safety law and duties, Carbon monoxide, Tightness testing and purging, Ventilation and more, with a Start · 10 questions button

Question 10 of 30 in CCN1, Unsafe situations, level Tricky: “You find a dangerous gas appliance. Which of these would make it reportable to HSE under RIDDOR Reg 11(2)?”, with option B marked wrong, D marked right, and a note under the wrong options

Below the answer: “Wrong. The answer is D”, an explanation of RIDDOR Reg 11(2), an On the job tip to report within 14 days, and the sources RIDDOR Reg 11(2) and IGEM/G/11 clauses 8.4 and 8.3

Results: 97%, 29 of 30 right in a CCN1 practice, Unsafe situations 29 of 30 by topic, with Review answers and Retry the 1 wrong buttons

CCN1 and CENWAT, with your progress

What it does

Zero Drop is revision for the ACS gas assessments, the theory papers UK gas engineers sit for the certificates of competence that put them on the Gas Safe Register, and sit again every five years to stay on it. It covers core domestic gas safety (CCN1) and boilers and water heaters (CENWAT).

The assessments need every answer right, so accuracy comes first. Each question is written from the regulations and standards themselves and names the document and clause it rests on, so you can check it for yourself. Answer one and it shows the right answer, an explanation, and the document and clause to look it up in.

Practise a module by topic and level, then go back over the questions you got wrong or flagged. Try 15 questions free; one purchase unlocks the rest, for good. No account, no adverts, and it works offline.

Zero Drop is a study aid, not proof of competence. It is independent and unofficial, and not affiliated with, endorsed by or connected to the Gas Safe Register, the Health and Safety Executive or any ACS certification body.

The details

AvailabilityOn the App Store and Google Play, in the UK.
PlatformiPhone, iPad and Android
RequiresiOS 17.0 or later
Android requiresAndroid 8.0 or later
AssessmentsACS domestic gas · CCN1 and CENWAT
Questions659 across 24 topics, each with the document and clause it rests on
Price15 questions free. One in-app purchase unlocks the rest, for good.
AccountNone. There is no sign-in.
StatusLive

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