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100+ Free VIC Plumbing Licence Exam Practice Questions

Victoria Plumbing Industry Licence Exam (VBA/BPC) practice questions are available now; exam metadata is being verified.

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2026 Statistics

Key Facts: VIC Plumbing Licence Exam Exam

100

Practice Questions

OpenExamPrep

7

Main Plumbing Classes

VBA/BPC

$750

Compliance Certificate Threshold

Plumbing Regulations 2018

5 days

Certificate Issue Timeframe

Plumbing Regulations 2018

AS/NZS 3500

Core Plumbing Standard

Standards Australia

Open-reference

Exam Format

VBA/BPC

The Victoria Plumbing Industry Licence Exam is administered by the Victorian Building Authority (now the Building and Plumbing Commission) and is the theory assessment a registered plumber must pass to become licensed in a class such as water supply, sanitary, drainage, roofing/stormwater, mechanical services, irrigation or gasfitting. Exams are open-reference: candidates locate and interpret AS/NZS 3500, the Plumbing Code of Australia and the Plumbing Regulations 2018, perform calculations and mark up drawings, so the question count, time and pass mark vary by class. Only a licensed plumber may issue a compliance certificate (required for plumbing work valued at $750 or more, and for all gasfitting), and it must be issued within five days. This free prep includes 100 research-based practice questions with explanations and an AI tutor.

Sample VIC Plumbing Licence Exam Practice Questions

Try these sample questions to test your VIC Plumbing Licence Exam exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1In Victoria, which body administers the plumbing registration, licensing and the plumbing industry licence (theory) examinations?
A.WorkSafe Victoria
B.The Victorian Building Authority (now the Building and Plumbing Commission)
C.Energy Safe Victoria
D.The Australian Building Codes Board
Explanation: Plumbing registration, licensing and the associated theory and practical exams in Victoria are administered by the Victorian Building Authority (VBA), which transitioned to the Building and Plumbing Commission (BPC) in 2025. Energy Safe Victoria regulates gas safety but does not run plumbing licensing.
2Which document sets the minimum value of plumbing work above which a compliance certificate must be issued in Victoria?
A.AS/NZS 3500.1
B.The Plumbing Regulations 2018
C.The National Construction Code Volume One
D.The Building Act 1993
Explanation: The Plumbing Regulations 2018 (made under the Building Act 1993) set the requirement that a compliance certificate must be issued for plumbing work valued at $750 or more. AS/NZS 3500 is a technical standard, not the source of the certificate threshold.
3What is the minimum value of plumbing work for which a compliance certificate must be issued in Victoria?
A.$500
B.$750
C.$1,000
D.$2,500
Explanation: Under the Plumbing Regulations 2018, a compliance certificate must be issued for any plumbing work with a value of $750 or more (and for all gasfitting work regardless of value). This certifies the work complies with the relevant regulations, codes and standards.
4Who is authorised to issue a plumbing compliance certificate in Victoria?
A.A registered plumber in the relevant class
B.A licensed plumber in the relevant class
C.An apprentice plumber under supervision
D.A building surveyor
Explanation: Only a licensed plumber in the relevant class may issue a compliance certificate. A registered plumber must work under the supervision of a licensed plumber and cannot issue certificates themselves. This is a key practical difference between registration and licensing in Victoria.
5Within how many days of completing plumbing work that requires a compliance certificate must the licensed plumber issue it in Victoria?
A.Within 5 days
B.Within 14 days
C.Within 30 days
D.Within 90 days
Explanation: Under the Plumbing Regulations 2018, the licensed plumber responsible for the work must issue the compliance certificate within five days of completing the work. The certificate is then lodged with the VBA/BPC and a copy provided to the consumer.
6Which AS/NZS 3500 part covers water services (cold and hot water supply pipework and backflow protection)?
A.AS/NZS 3500.1
B.AS/NZS 3500.2
C.AS/NZS 3500.3
D.AS/NZS 3500.4
Explanation: AS/NZS 3500.1 'Plumbing and drainage Part 1: Water services' covers cold water supply, pipe sizing, materials and backflow prevention. Part 2 covers sanitary plumbing/drainage, Part 3 stormwater, and Part 4 heated water services.
7Which AS/NZS 3500 part deals with sanitary plumbing and drainage?
A.AS/NZS 3500.1
B.AS/NZS 3500.2
C.AS/NZS 3500.3
D.AS/NZS 3500.5
Explanation: AS/NZS 3500.2 'Sanitary plumbing and drainage' sets requirements for the design and installation of sanitary plumbing and drainage from fixtures to the sewer, including stacks, vents, traps and drains. Part 5 is the simplified domestic (single dwelling) installations standard.
8The minimum trap seal depth required to protect against the loss of seal in a fixture trap under AS/NZS 3500.2 is:
A.25 mm
B.40 mm
C.50 mm
D.75 mm
Explanation: A water seal trap must retain a minimum seal depth of 50 mm. The water seal prevents foul air and gases from the drainage system entering the building. Inadequate venting can siphon or blow out the seal, allowing sewer gas into the space.
9Under AS/NZS 3500.2, what is the minimum grade (fall) for a DN 100 sanitary drain?
A.1 in 40
B.1 in 60
C.1 in 80
D.1 in 100
Explanation: AS/NZS 3500.2 specifies a minimum grade of 1 in 60 for DN 100 drains and 1 in 100 (often cited as 1 in 90–100) for DN 150 drains. Adequate fall ensures self-cleansing velocity so solids are carried along without blockage or solids stranding.
10What is the primary purpose of a vent (ventilation pipe) in a sanitary drainage system?
A.To increase water pressure to fixtures
B.To balance air pressure and protect trap water seals
C.To act as an overflow for fixtures
D.To filter foul gases before release
Explanation: Vents balance air pressure within the drainage system so that positive or negative pressure surges do not blow out or siphon the water seal in fixture traps. By admitting air, vents keep trap seals intact and prevent sewer gases entering the building.

About the VIC Plumbing Licence Exam Practice Questions

Verified exam format metadata for Victoria Plumbing Industry Licence Exam (VBA/BPC) is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.