Free Practice Questions for ACS Commercial Catering
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Key Facts: ACS Commercial Catering Exam
100
Practice Questions
OpenExamPrep
5 years
Certificate Validity
ACS / LCL Awards
BS 6173
Catering Gas Standard
BSI
2800 / 5000 ppm
CO2 Warning / Lockout
IGEM/UP/19
0.004
Max CO/CO2 Ratio
Industry standard
COMCAT1-5
Appliance Modules
ACS scheme
The ACS Commercial Catering assessment certifies Gas Safe operatives to work on non-domestic catering gas installations and appliances. It is built from the CCCN1 core (or CODC1 changeover) plus appliance modules COMCAT1-5, and is assessed by open-book written theory (multiple-choice, short written response and scenario questions) together with observed practical tasks. Certificates are valid for 5 years, with MOT-style reassessment available up to 6 months early. Content spans catering gas legislation (GSIUR 1998, the ACS scheme and GIUSP), ventilation and extraction with interlocks under BS 6173 and IGEM/UP/19 (CO2 warning at 2800 ppm, lockout at 5000 ppm), catering pipework testing to IGE/UP/1, ranges/ovens/fryers/bratt pans/grills and combi ovens, flueless appliance ventilation, commissioning and combustion checks (CO/CO2 ratio limit ~0.004). This free prep includes 100 research-based practice questions with explanations and an AI tutor.
Sample ACS Commercial Catering Practice Questions
Try these sample questions to review concepts for the ACS Commercial Catering exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1Which legislation places the principal duty on persons carrying out work on gas catering appliances to be competent and registered?
2What is the standard validity period of an ACS commercial catering gas qualification such as CCCN1 before reassessment is required?
3Which ACS assessment is the CORE that must be held before any commercial catering appliance (COMCAT) module can be certificated?
4Which British Standard specifically covers the installation and maintenance of gas-fired catering appliances in all types of catering establishments?
5Which standard governs the design and application of interlock devices used with gas appliance installations in commercial catering establishments?
6Under BS 6173, what must happen to the gas supply in a commercial kitchen if the mechanical ventilation system fails or provides inadequate airflow?
7A gas interlock system commonly proves that the extraction fan is moving sufficient air by sensing which parameter across the fan?
8Which document is the recognised industry specification for the design of commercial kitchen ventilation (ductwork and extraction) systems?
9Under IGEM/UP/19, where CO2 monitoring is fitted in a commercial kitchen, at what CO2 level should a warning (visual or audible) typically be raised?
10Under IGEM/UP/19, at what CO2 concentration should the interlock cause a lockout of the gas supply to the kitchen?
About the ACS Commercial Catering Exam
The ACS Commercial Catering gas safety assessment (CCCN1 core plus COMCAT appliance modules) is the route Gas Safe operatives use to demonstrate competence on non-domestic catering gas installations and appliances. It is assessed by open-book written theory (multiple-choice, short written and scenario questions) plus observed practical tasks, and certification is valid for 5 years.
Exam sponsor: ACS approved assessment centres under certification bodies such as LCL Awards (Gas Safe scheme). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.
Assessment
Open-book written theory (multiple-choice plus short written and scenario questions) and observed practical assessment, covering the CCCN1 core and COMCAT1-5 appliance modules; certification valid 5 years
Time Limit
Varies by centre; a CCCN1 package with COMCAT1 & 3 is typically delivered over 4-5 days of training and assessment
Passing Score
All assessed elements must be passed; no overall percentage is published
Exam / Certification Fees
Approx. £650-£945 for a CCCN1 + COMCAT1 & 3 package; individual COMCAT modules ~£95 each (varies by centre)
Exam sponsor websiteFees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.
Our practice resources: topics covered
We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.
Catering Gas Safety Legislation
GSIUR 1998, Gas Safe Register and the ACS scheme, GIUSP (ID/AR/NCS), the emergency control valve, gas escapes, LPG storage and responsible-person duties
Ventilation & Extraction (Interlocks)
BS 6173 and DW/172 ventilation, combustion and make-up air balance, mechanical extraction, the interlock requirement, depressurisation hazards and grease/fire risk
Gas Interlock Systems
Airflow, air-pressure and fan-current proving, IGEM/UP/19 CO2 monitoring (2800 ppm warning, 5000 ppm lockout), solenoid valves, manual reset, pressure proving and detection
Catering Pipework
IGE/UP/1 strength and tightness testing at operating pressure, let-by, stabilisation, purging, pipe sizing, support and restrained flexible connectors
Ranges, Ovens, Fryers, Bratt Pans & Grills
COMCAT1-5 appliance groups, flame supervision devices, fryer high-limit cut-offs, bratt pans, griddles, salamanders, water boilers, combi ovens and clearances
Flueless Appliance Ventilation
Flueless appliances releasing products of combustion into the room, ventilation and CO2-monitoring backup, mobile/LPG catering and gas density considerations
Commissioning Catering Appliances
Operating-pressure checks, gas rating against the data plate, governors, over-gassing, commissioning sequence, combi-oven controls and handover records
Combustion Checks
Flame picture, complete vs incomplete combustion, CO/CO2 ratio (max ~0.004), flue gas analysers, spillage testing and carbon-monoxide hazards
Preparing for the ACS Commercial Catering Exam
What You Need to Know
- Passing score: All assessed elements must be passed; no overall percentage is published
- Assessment: Open-book written theory (multiple-choice plus short written and scenario questions) and observed practical assessment, covering the CCCN1 core and COMCAT1-5 appliance modules; certification valid 5 years
- Time limit: Varies by centre; a CCCN1 package with COMCAT1 & 3 is typically delivered over 4-5 days of training and assessment
- Exam / certification fees: Approx. £650-£945 for a CCCN1 + COMCAT1 & 3 package; individual COMCAT modules ~£95 each (varies by centre) Official sources
Using Our Practice Resources
- Work through all 100 available questions
- Review every answer and explanation
- Track weak areas and revisit them
- Use our AI tutor for tough concepts
ACS Commercial Catering: Suggested Study Strategy
Frequently Asked Questions
What is the ACS Commercial Catering assessment and what does CCCN1 mean?
It is the Gas Safe ACS route for non-domestic catering gas work. CCCN1 is the core commercial catering natural gas safety assessment (CODC1 is the changeover route), and it must be held before appliance modules COMCAT1-5 can be added.
How is the ACS commercial catering exam assessed?
It combines open-book written theory - multiple-choice plus short written response and scenario questions - with observed practical tasks. Each element must be passed; there is no single published overall percentage score.
How long is an ACS commercial catering certificate valid?
ACS certificates such as CCCN1 and the COMCAT modules are valid for 5 years. You can reassess up to 6 months early (MOT-style) without losing any remaining validity; if expired more than 12 months you must take the initial assessment again.
What do the COMCAT modules cover?
COMCAT1 covers ranges, ovens and boiling appliances; COMCAT2 water/steam boilers; COMCAT3 fryers, bratt pans and grills; COMCAT4 fish-and-chip ranges; and COMCAT5 combination (combi) ovens. You hold the modules relevant to the appliances you work on.
What are the key ventilation and interlock rules for commercial kitchens?
BS 6173 requires an interlock that cuts off the gas if mechanical ventilation is inadequate. IGEM/UP/19 adds CO2 monitoring used with airflow proving - a warning above 2800 ppm and a gas lockout above 5000 ppm.
Is this free ACS commercial catering practice as good as paid prep?
Our 100 practice questions cover the same theory domains as the CCCN1 and COMCAT assessments - legislation, ventilation, interlocks, pipework, appliances, commissioning and combustion - with a teaching explanation for every answer plus a free daily AI tutor. All content is free and updated for 2026.