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100+ Free ACS Commercial Catering Practice Questions

ACS Commercial Catering Gas Safety Assessment (CCCN1 / COMCAT) practice questions are available now; exam metadata is being verified.

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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 test your ACS Commercial Catering exam readiness. 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?
A.The Health and Safety at Work etc. Act 1974 only
B.The Gas Safety (Installation and Use) Regulations 1998 (GSIUR)
C.The Building Regulations 2010 Part J
D.The Provision and Use of Work Equipment Regulations 1998
Explanation: The Gas Safety (Installation and Use) Regulations 1998 (GSIUR) require that anyone carrying out gas work in the course of business is competent and a member of the Gas Safe Register. Commercial catering competence is demonstrated through the ACS scheme (CCCN1 plus appliance modules).
2What is the standard validity period of an ACS commercial catering gas qualification such as CCCN1 before reassessment is required?
A.1 year
B.3 years
C.5 years
D.10 years
Explanation: ACS certificates, including the CCCN1 core commercial catering assessment and COMCAT appliance modules, are valid for 5 years. Reassessment can be taken up to 6 months early (MOT-style) without losing any of the remaining validity.
3Which ACS assessment is the CORE that must be held before any commercial catering appliance (COMCAT) module can be certificated?
A.COMCAT1
B.CCCN1 (or CODC1 changeover)
C.CMA1
D.CKR1
Explanation: CCCN1 is the core commercial catering natural gas safety assessment (CODC1 is the changeover route for those moving from another core). It must be held before appliance-specific COMCAT1-5 modules can be added.
4Which British Standard specifically covers the installation and maintenance of gas-fired catering appliances in all types of catering establishments?
A.BS 6644
B.BS 5440
C.BS 6173
D.BS 6798
Explanation: BS 6173 (latest 2020) is the specification for installation and maintenance of gas-fired catering appliances burning 2nd and 3rd family gases in all types of catering establishments. It is the primary standard for commercial catering gas work.
5Which standard governs the design and application of interlock devices used with gas appliance installations in commercial catering establishments?
A.IGEM/UP/19
B.IGEM/UP/10
C.BS 5440-2
D.IGEM/UP/4
Explanation: IGEM/UP/19 is the dedicated standard for the design and application of interlock devices and associated systems used with gas appliances in commercial catering establishments. It works alongside BS 6173.
6Under BS 6173, what must happen to the gas supply in a commercial kitchen if the mechanical ventilation system fails or provides inadequate airflow?
A.A warning light only is illuminated and gas continues to flow
B.The gas supply is automatically cut off (or appliances prevented from operating) by an interlock
C.The extraction fan speed is increased automatically
D.Nothing — the operator manually monitors airflow
Explanation: BS 6173 requires an interlock that cuts off the gas supply, or prevents appliance operation, when the mechanical ventilation provides inadequate airflow. Gas should not be available without confirmed operation of the ventilation system.
7A gas interlock system commonly proves that the extraction fan is moving sufficient air by sensing which parameter across the fan?
A.Air temperature rise across the fan
B.Differential air pressure across the fan
C.Gas pressure at the meter
D.Ambient light level in the canopy
Explanation: A differential air-pressure switch senses the pressure difference either side of the extract fan and is set to trip at the required airflow. An air-current (fan-current) sensor monitoring the fan motor is an accepted alternative method.
8Which document is the recognised industry specification for the design of commercial kitchen ventilation (ductwork and extraction) systems?
A.DW/172
B.BS 7671
C.IGE/UP/2
D.BS 1710
Explanation: DW/172 (BESA) is the specification for kitchen ventilation systems and sets out extract airflow design for canopies and ductwork. Gas interlock airflow proving is set against the rates DW/172 requires for safe appliance operation.
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?
A.350 ppm
B.1000 ppm
C.2800 ppm
D.10000 ppm
Explanation: IGEM/UP/19 specifies that a CO2 level above 2800 ppm should give a visual or audible warning (the At Risk threshold), and a level above 5000 ppm should cause the interlock to lock out the gas supply (Immediately Dangerous).
10Under IGEM/UP/19, at what CO2 concentration should the interlock cause a lockout of the gas supply to the kitchen?
A.1500 ppm
B.2800 ppm
C.5000 ppm
D.8000 ppm
Explanation: A CO2 level above 5000 ppm is classified as Immediately Dangerous, and IGEM/UP/19 requires the interlock to lock out (isolate) the gas supply at this level. Between 2800 ppm and 5000 ppm is the At Risk warning band.

About the ACS Commercial Catering Practice Questions

Verified exam format metadata for ACS Commercial Catering Gas Safety Assessment (CCCN1 / COMCAT) is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.