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Free Practice Questions for NSW Gasfitting

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Exam Review

Key Facts: NSW Gasfitting Exam

100

Practice Questions

OpenExamPrep

AS/NZS 5601.1

Governing Standard

Standards Australia/NZ

~1.13 / ~2.75 kPa

NG / LPG Supply Pressure

AS/NZS 5601.1

5 business days

Certificate Lodgement (eCert)

NSW Fair Trading

5 years

Licence Term & Record-Keeping

NSW Fair Trading

Type A

General Domestic/Commercial Scope

NSW Fair Trading

The NSW Gasfitting Licence lets a qualified tradesperson perform gaswork on consumer gas installations in NSW under NSW Fair Trading and the Gas and Electricity (Consumer Safety) Act 2017. It is qualification and competency-based rather than a fixed-count exam, built on AS/NZS 5601.1 for the design, installation, commissioning and testing of natural gas and LP Gas installations. Gasfitters must soundness-test pipework, ensure correct combustion, ventilation and flueing, and lodge a certificate of compliance (network-connected) or inspection (not connected) via BCNSW eCert within 5 business days, keeping a copy for 5 years. This free prep includes 100 research-based practice questions with explanations and an AI tutor.

Sample NSW Gasfitting Practice Questions

Try these sample questions to review concepts for the NSW Gasfitting exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which standard sets out the general requirements for the design, installation and commissioning of domestic and commercial gas installations in NSW?
A.AS/NZS 3000
B.AS/NZS 5601.1
C.AS 4645
D.AS/NZS 3500.4
Explanation: AS/NZS 5601.1 'Gas installations Part 1: General installations' is the primary standard for the design, installation and commissioning of gas installations using natural gas, LP Gas or biogas in NSW. It is referenced by NSW gas safety legislation.
2In NSW, who must a person hold a licence or certificate from before performing any gasfitting work, regardless of the value of the work?
A.NSW Fair Trading
B.Australian Gas Association
C.Energy Safe Victoria
D.WorkSafe NSW
Explanation: NSW Fair Trading licenses plumbing, draining and gasfitting work under the Home Building Act and gas safety legislation. A licence or certificate is required for any gasfitting work irrespective of its cost or whether it is residential, commercial or industrial.
3Natural gas is mostly methane. Compared with air, methane is:
A.Heavier than air and pools at floor level
B.Lighter than air and rises
C.The same density as air
D.Heavier than air only when cold
Explanation: Methane has a relative density (specific gravity) of about 0.55, so it is lighter than air and rises. This is why ventilation for natural gas leaks is provided high in a room, and why high-level detection is appropriate.
4LP Gas (commercial propane) has a relative density of about 1.5. In a leak, the gas will tend to:
A.Rise to the ceiling
B.Disperse evenly through the room
C.Sink and accumulate at low points
D.Stay suspended at mid-height
Explanation: Propane is roughly 1.5 times the density of air, so leaked LP Gas sinks and collects at floor level, in pits, drains and low cavities. This is why LPG appliances and cylinders have specific requirements around low-level openings and below-ground spaces.
5Under AS/NZS 5601.1, what is the ONLY acceptable method of locating a suspected gas leak on consumer piping?
A.A lit match held near the joint
B.A soap-and-water solution or approved gas-detection equipment
C.Smelling for odorant only
D.Listening for a hissing sound only
Explanation: AS/NZS 5601.1 requires that a soap-and-water solution or other suitable gas-detecting equipment be the only methods used to locate a leak. Matches, candles or any other ignition source must never be used.
6During a soundness (leakage) test on consumer piping under AS/NZS 5601.1, the installation is pressurised to operating pressure or 2.0 kPa, whichever is greater. The test is satisfactory when, over the test period, there is:
A.A pressure rise of no more than 2 kPa
B.No loss of pressure
C.A loss of less than 10 kPa
D.A steady rise to operating pressure
Explanation: A soundness test requires the test pressure (operating pressure or 2.0 kPa, whichever is greater) to be held with no loss of pressure over the test period. Any drop indicates a leak that must be found and rectified before gas is connected.
7What is the approximate nominal supply (standard test) pressure for natural gas at a domestic appliance inlet in Australia?
A.1.13 kPa
B.2.75 kPa
C.7.0 kPa
D.70 kPa
Explanation: Natural gas is reticulated to domestic appliances at a nominal supply pressure of about 1.13 kPa (just over 1 kPa). Appliances are designed and adjusted to operate correctly at this low pressure.
8What is the approximate nominal supply (standard test) pressure for LP Gas at a domestic appliance inlet in Australia?
A.1.13 kPa
B.2.75 kPa
C.5.5 kPa
D.47 kPa
Explanation: LP Gas is supplied to domestic appliances at a nominal pressure of about 2.75 kPa. This is higher than natural gas (1.13 kPa) because LPG has a higher calorific value, so a smaller volume delivers the same energy.
9A gasfitter completes new gasfitting work on an installation connected to a gas network in NSW. Which document must they provide?
A.A certificate of inspection
B.A certificate of compliance
C.A defect notice
D.A development application
Explanation: When gasfitting work is carried out on an installation connected to a gas network, the gasfitter must provide a certificate of compliance. A certificate of inspection is used instead when the installation is NOT connected to a network.
10Within how many business days of completing gasfitting work must a NSW gasfitter submit a certificate of compliance or inspection?
A.1 business day
B.5 business days
C.14 business days
D.30 business days
Explanation: NSW requires the certificate of compliance or certificate of inspection to be submitted within 5 business days of completing the gasfitting work. From 1 March 2026 these certificates must be lodged through the BCNSW eCert portal.

About the NSW Gasfitting Exam

The NSW Gasfitting Licence authorises a tradesperson to carry out gasfitting (gaswork) on consumer gas installations in NSW under the Gas and Electricity (Consumer Safety) Act 2017. It is qualification-based: holders complete a recognised plumbing/gasfitting qualification with gasfitting competencies, work to AS/NZS 5601.1, and lodge certificates of compliance or inspection via the BCNSW eCert portal. This covers general Type A domestic and commercial gasfitting, distinct from complex/advanced Type B gas work.

Exam sponsor: NSW Fair Trading (licensing); registered training organisations (assessment). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

Competency-based gasfitting assessment built on AS/NZS 5601.1 plus the NSW gaswork licence application; this practice bank is 100 selected-response trade-theory items covering gas safety, piping, appliances, flueing, ventilation, pressures, testing and NSW certificates

Time Limit

Varies by RTO assessment

Passing Score

Competency-based; RTO assessment pass mark (commonly 80%+ for gas safety units)

Exam / Certification Fees

RTO training/assessment fees plus NSW Fair Trading licence application fees (varies)

Exam sponsor website

Fees, 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.

18%

AS/NZS 5601.1 Gas Installations

The general gas installations standard; scope of consumer installations vs the network; key clauses for piping, appliances, ventilation and flueing

16%

Consumer Piping & Sizing

Pipe materials and jointing, effective/equivalent length, allowable pressure drop, MJ/h load calculation, sleeving, isolation valves and concealed-piping rules

16%

Appliance Installation & Commissioning

Certified Type A appliances, data plates and MJ/h input, injectors and aeration, burner pressure and gas-rate testing, purging, flame appearance and conversion

14%

Flueing & Ventilation

Open-flued, balanced-flue and flueless appliances, flue terminal clearances, draught diverters, spillage and depressurisation testing, and combustion-air ventilation

12%

Gas Pressures & Regulation

Nominal supply pressures (NG ~1.13 kPa, LPG ~2.75 kPa), single and two-stage regulators, regulator vents, medium-pressure services, meters and manometers

12%

Leak & Soundness Testing

Soundness testing (2.0 kPa or operating pressure, no loss), approved leak detection (soap/detector, never a flame), purging and emergency response

8%

Gas Properties: NG vs LPG

Relative density, calorific value, flammable range, odorant, combustion products including carbon monoxide, and LPG cylinder behaviour

4%

NSW Licensing & Certificates

NSW Fair Trading gaswork licensing, certificates of compliance/inspection via BCNSW eCert, 5-day lodgement and 5-year record-keeping

Preparing for the NSW Gasfitting Exam

What You Need to Know

  • Passing score: Competency-based; RTO assessment pass mark (commonly 80%+ for gas safety units)
  • Assessment: Competency-based gasfitting assessment built on AS/NZS 5601.1 plus the NSW gaswork licence application; this practice bank is 100 selected-response trade-theory items covering gas safety, piping, appliances, flueing, ventilation, pressures, testing and NSW certificates
  • Time limit: Varies by RTO assessment
  • Exam / certification fees: RTO training/assessment fees plus NSW Fair Trading licence application fees (varies) 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

NSW Gasfitting: Suggested Study Strategy

1Anchor your study in AS/NZS 5601.1 - know the scope, soundness testing, ventilation and flueing clauses cold
2Memorise key values: NG supply ~1.13 kPa, LPG supply ~2.75 kPa, soundness test 2.0 kPa or operating pressure with no loss
3Know the gas properties: methane (NG) is lighter than air and rises; propane (LPG) is heavier and pools low
4Never use a flame to find a leak - only soap solution or an approved detector; this is a frequent test point
5Understand certificates of compliance vs inspection, BCNSW eCert lodgement within 5 business days, and 5-year record-keeping
6Complete all 100 practice questions and review every miss with the AI tutor before your assessment

Frequently Asked Questions

Is the NSW gasfitting licence a single multiple-choice exam?

No. NSW gasfitting (gaswork) authorisation is qualification and competency-based. You complete a recognised plumbing/gasfitting qualification including gasfitting units assessed by a registered training organisation, then apply to NSW Fair Trading for the licence. There is no single published fixed-count exam.

Which standard does NSW gasfitting work follow?

Consumer gas installations in NSW follow AS/NZS 5601.1 'Gas installations Part 1: General installations', covering design, installation, commissioning and testing of natural gas and LP Gas installations. It is referenced under the Gas and Electricity (Consumer Safety) Act 2017.

What is a gas certificate of compliance and when is it required?

When gasfitting work is done on an installation connected to a gas network, the gasfitter must provide a certificate of compliance; for installations not connected to a network, a certificate of inspection is used. From 1 March 2026 these are lodged via the BCNSW eCert portal within 5 business days, and a copy is kept for 5 years.

How do you test a gas installation for soundness?

Pipework is pressurised to operating pressure or 2.0 kPa, whichever is greater, and the test is satisfactory only if there is no loss of pressure over the test period. Leaks are located using a soap-and-water solution or approved gas detector - never a flame.

What is the difference between general gasfitting and complex (Type B) gas work?

General NSW gasfitting covers certified Type A domestic and commercial appliances and consumer piping. Complex or advanced (Type B) gas work involves engineered, non-certified industrial gas appliances and requires separate, higher-level authorisation.

Is this free NSW gasfitting practice as good as paid prep?

Our 100 practice questions cover the core gas-safety trade theory - AS/NZS 5601.1, piping, appliances, flueing, ventilation, pressures and testing - with a teaching explanation for every answer plus free daily AI tutor interactions. All content is free forever and updated for 2026.