Vehicle Roadworthiness Standards and Inspection: Defect Recognition and Judgement
The standards you inspect against
This domain tests whether you can apply the roadworthiness standard item by item: brakes (performance, balance, condition, air/hydraulic integrity), steering and suspension (free play, security, wear), tyres (condition, tread, matching, load/speed suitability), lighting and signalling, structure and bodywork (corrosion, security of components), emissions, and safety equipment such as mirrors, seat belts and speed limiters.
Judging severity
A key skill is classifying a defect. Ask: does it make the vehicle dangerous to use now, does it breach a defined standard, or is it a minor observation? Dangerous defects demand immediate prohibition from use; major defects mean failure; minor items may be recorded as advisories. Consistency matters more than opinion.
Traps in questions
Common traps include confusing wear limits with recommended replacement points, treating an advisory as a pass item with no record, and overlooking indirect faults (for example, a brake imbalance caused by a seized component rather than worn linings). Questions may present a borderline measurement and expect you to apply the stated limit exactly, not to round in the operator's favour. Another trap is judging a component in isolation when the standard requires assessing its security and function together.
Worked rule of thumb
When a measurement sits exactly at the limit, apply the rule as written: if the standard says 'less than', the limit value fails; if it says 'not exceeding', the limit value passes. Read the wording, then measure, then classify.