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100+ Free C&G 6014 Gas Practice Questions

City & Guilds 6014 Level 3 NVQ Diploma in Gas Utilisation practice questions are available now; exam metadata is being verified.

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Key Facts: C&G 6014 Gas Exam

100

Practice Questions

OpenExamPrep

Level 3 NVQ

Qualification Level

City & Guilds

~21 mbar

NG Working Pressure

GSIUR / BS 6891

0.004

Max CO/CO2 Ratio

Combustion guidance

IGEM/G/11

GIUSP Standard

IGEM

ACS-aligned

Gas Safe Recognised

City & Guilds

The City & Guilds 6014 Level 3 NVQ Diploma in Gas Utilisation is a competence-based gas industry qualification aligned to the ACS criteria and recognised by the Gas Safe Register. It is assessed through online unit knowledge tests, a workplace evidence portfolio and practical observation rather than a single timed exam, with knowledge tests typically requiring around 80%. The qualification covers gas safety legislation (GSIUR 1998 and the L56 ACOP), pipework sizing and tightness testing (BS 6891, the 1 mbar limit and ~21 mbar working pressure), combustion and flue gas analysis (CO/CO2 ratio thresholds), ventilation (BS 5440-2), flues and chimneys (BS 5440-1), appliance installation/commissioning/servicing, the Gas Industry Unsafe Situations Procedure (IGEM/G/11), and electrical safety in gas appliances. This free prep includes 100 research-based practice questions with explanations and an AI tutor.

Sample C&G 6014 Gas Practice Questions

Try these sample questions to test your C&G 6014 Gas exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which set of regulations places the principal legal duties on people carrying out work on domestic gas fittings and appliances in Great Britain?
A.The Building Regulations 2010 Part J
B.The Gas Safety (Installation and Use) Regulations 1998 (GSIUR)
C.The Pressure Systems Safety Regulations 2000
D.The Pipelines Safety Regulations 1996
Explanation: The Gas Safety (Installation and Use) Regulations 1998 (GSIUR), supported by the L56 Approved Code of Practice, are the principal statutory rules governing the installation, maintenance and use of gas fittings and appliances. They sit under the Health and Safety at Work etc. Act 1974.
2Under GSIUR, a person working on gas fittings in the course of business must be a member of a class of persons approved by the HSE. Which body currently holds that approval?
A.CORGI
B.Gas Safe Register
C.OFGEM
D.The Institution of Gas Engineers and Managers
Explanation: Since 1 April 2009 the Gas Safe Register is the HSE-approved body for businesses and engineers carrying out gas work in Great Britain, the Isle of Man and Guernsey. It replaced CORGI as the official registration scheme.
3An engineer holds a 6014 NVQ Diploma in Gas Utilisation but their ACS category certificates have lapsed. What is the correct position regarding carrying out domestic gas work?
A.The NVQ alone proves competence indefinitely so they may continue working
B.They must hold current ACS (or equivalent) certification and Gas Safe registration to be legally competent
C.They may work provided a registered engineer signs off the job afterwards
D.ACS is only advisory and registration is sufficient on its own
Explanation: Competence under GSIUR is demonstrated by current Accredited Certification Scheme (ACS) certificates renewed every five years, alongside Gas Safe registration. The 6014 NVQ supports the qualification route but does not replace current ACS certification for the work categories held.
4What is the principal purpose of the emergency control valve (ECV) in a domestic gas installation?
A.To regulate the appliance burner pressure
B.To allow the gas supply to the premises to be turned off in an emergency
C.To prevent backflow of flue gases
D.To filter debris from the incoming gas
Explanation: The emergency control valve is the consumer's means of shutting off the whole gas supply to the premises in an emergency. Under GSIUR it must be readily accessible, have a clearly indicated on/off position and be fitted as close as practicable to the meter or service entry.
5GSIUR requires that no gas appliance be installed in a private dwelling in certain rooms unless it is room-sealed or has a safety device. In which room is a non-room-sealed gas fire generally prohibited?
A.A kitchen
B.A bedroom or bathroom
C.A hallway
D.A living room
Explanation: GSIUR restricts the installation of open-flued and flueless appliances in rooms used for sleeping (bedrooms) and in bathrooms. In these rooms appliances must generally be room-sealed, or for bedrooms above a stated input fitted with an atmosphere-sensing device, because of the heightened carbon monoxide risk.
6What is the standard nominal operating (working) pressure for natural gas at the outlet of a domestic meter in the UK?
A.8 mbar
B.21 mbar
C.37 mbar
D.75 mbar
Explanation: Domestic natural gas (G20) is supplied at a nominal working pressure of about 21 mbar at the meter outlet, with appliances designed to operate at this low-pressure regime. The supply must remain within the permitted range (typically not below 19 mbar at the meter).
7When sizing low-pressure domestic gas pipework to BS 6891, what is the maximum permitted pressure drop between the meter outlet and any appliance at full rate for natural gas?
A.0.5 mbar
B.1.0 mbar
C.2.5 mbar
D.5.0 mbar
Explanation: BS 6891 limits the total pressure drop from the meter outlet to the most remote appliance to a maximum of 1 mbar for natural gas at maximum demand. Keeping within 1 mbar ensures every appliance still receives adequate working pressure.
8What is the approximate actual internal bore of standard 22 mm outside-diameter copper tube used for domestic gas pipework?
A.15 mm
B.19.5 mm
C.22 mm
D.25 mm
Explanation: Standard 22 mm OD copper tube has an actual internal bore of approximately 19.5 mm because of the wall thickness. Pipe-sizing tables in BS 6891 are based on this bore, and using nominal rather than actual bore would overstate capacity on long runs.
9During a let-by test on a domestic installation, what is the engineer checking for?
A.Gas passing through the emergency control valve when it is in the off position
B.The accuracy of the gas meter index
C.The free area of the ventilation opening
D.The CO/CO2 ratio at the appliance
Explanation: The let-by test confirms that the emergency control valve (or meter control) is holding tight and not allowing gas to pass into the test section while shut. Any rise on the gauge during the let-by period indicates the control is letting by and the tightness test cannot proceed.
10On a domestic low-pressure tightness test, to what pressure is the installation typically raised before the stabilisation and test period for natural gas?
A.10 mbar
B.20 to 21 mbar
C.37 mbar
D.100 mbar
Explanation: For natural gas the installation is pressurised to about 20-21 mbar (close to working pressure). After a one-minute stabilisation period to let temperature and pressure settle, the test is timed for two minutes and the gauge observed for any permissible or impermissible drop.

About the C&G 6014 Gas Practice Questions

Verified exam format metadata for City & Guilds 6014 Level 3 NVQ Diploma in Gas Utilisation is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.