Free Practice Questions for Cert III Auto Electrical
Exam-style questions and explanations by OpenExamPrep.
Loading practice questions...
Explore More Australian Trade Licences & Certificate III
Continue into nearby exams from the same family. Each card keeps practice questions, study guides, flashcards, videos, and articles in one place.
Key Facts: Cert III Auto Electrical Exam
100
Practice Questions
OpenExamPrep
32
Units of Competency
training.gov.au
Competency
Assessment Type
ASQA
3 years
Typical Apprenticeship
Australian Apprenticeships
The Certificate III in Automotive Electrical Technology (AUR30320) is Australia's trade qualification for auto electricians. Assessed unit-by-unit across 32 units, it spans circuit diagnostics, battery/starting/charging systems, engine management sensors, networking (CAN/LIN), body control modules, and hybrid/EV high-voltage safety. This prep includes 100 trade-theory practice questions.
Sample Cert III Auto Electrical Practice Questions
Try these sample questions to review concepts for the Cert III Auto Electrical exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1An automotive technician needs to find the resistance of an auxiliary lighting circuit. If the circuit is connected to a 12V source and draws a current of 2A, what is the resistance?
2Which of the following describes the correct procedure for measuring a voltage drop across a load?
3When using an oscilloscope to capture a waveform from a wheel speed sensor, what electrical parameter does the vertical axis (Y-axis) represent?
4What is the total resistance of two 6-ohm auxiliary lights connected in parallel to a vehicle's battery?
5A series diagnostic test circuit consists of three resistors: 4 ohms, 6 ohms, and 12 ohms. What is the total circuit resistance?
6An automotive circuit has a 2-ohm resistor. If a technician measures a current of 4A flowing through this resistor, what is the voltage drop across it?
7A 12V halogen fog lamp draws 5A of current. How much electrical power is dissipated by the lamp?
8A distribution block connects three parallel branches. Each branch contains a 12-ohm heating element. What is the total equivalent resistance of this circuit?
9What is the correct configuration for using a digital multimeter (DMM) to measure current draw in a circuit?
10What is the maximum acceptable voltage drop across a battery ground cable during an engine cranking test?
About the Cert III Auto Electrical Exam
The Certificate III in Automotive Electrical Technology (AUR30320) is the Australian trade qualification for auto electricians. It is a competency-based program usually completed as a 3-year apprenticeship. It covers electrical circuit diagnostics, starting and charging systems, electronic ignition and engine management, CAN bus/LIN networks, body electronics, lighting, accessories, and hybrid/electric vehicle high-voltage safety.
Exam sponsor: ASQA / Registered Training Organisations. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.
Assessment
Competency-based assessment across 32 units including theory tests, practical diagnostic tasks, and workplace evidence.
Time Limit
Not applicable (assessed over apprenticeship)
Passing Score
Competency-based (satisfactory on all assessments)
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.
Circuit Theory & Testing
Ohm's law, calculations, multimeter/oscilloscope operation, voltage drop
Starting & Charging Systems
Battery maintenance, solenoid starters, alternators, smart charging
Engine Management & Ignition
Sensors and actuators, electronic ignition, OBD-II scanner code analysis
Network & Body Controls
CAN/LIN bus testing, terminating resistors, BCM, body electrical
Lighting & Accessories
Relay circuits, LED/HID systems, trailer plug wiring, dual batteries
Hybrid & EV Safety
High voltage isolation procedures, MSD disconnect, PPE, WHS regulations
Preparing for the Cert III Auto Electrical Exam
What You Need to Know
- Passing score: Competency-based (satisfactory on all assessments)
- Assessment: Competency-based assessment across 32 units including theory tests, practical diagnostic tasks, and workplace evidence.
- Time limit: Not applicable (assessed over apprenticeship)
- Exam / certification fees: Varies by RTO and state government subsidies 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
Cert III Auto Electrical: Suggested Study Strategy
Frequently Asked Questions
What is the AUR30320 qualification?
It is the national trade qualification for automotive electricians in Australia, usually delivered as a 3-year apprenticeship program.
How is AUR30320 assessed?
Assessment is competency-based (satisfactory / not yet satisfactory) across 32 units of competency, combining theory exams with practical diagnostics.
What topics are examined?
It covers basic electrical circuits, starting and charging, engine management and OBD diagnostics, vehicle networking (CAN/LIN), accessories, and hybrid/EV safety.