Automotive Workshop Safety and Environment
This domain tests hazard recognition and control in a vehicle workshop: PPE, fire response, battery and fuel handling, lifting, chemical storage, waste segregation and emergency action. Questions often ask not only what to use but why a practice is unsafe.
Core rules
- PPE: safety glasses, steel-toe shoes, gloves, hearing protection and a respirator for solvent or paint work. Remove rings and loose clothing near rotating parts.
- Fire classes: A solids, B flammable liquids, C live electrical, D metals. Use CO2 or dry powder for B and C; never a water jet on petrol, solvent or energised electrical equipment.
- Batteries: charge in a ventilated area because they release hydrogen. Remove the negative terminal first and connect it last. Neutralise acid spills with sodium bicarbonate and use an eyewash station.
- Waste: keep used oil, filters, coolant, batteries and solvent in labelled containers. Never pour oil or coolant into drains or soil. Read the SDS before handling a chemical.
- Lifting: use jack stands and wheel chocks, never rely on a hydraulic jack alone. On hybrid or electric vehicles, treat orange high-voltage cables as live until the service plug is removed per the manufacturer procedure.
Worked example
A petrol spill near a battery charger ignites. The correct response is to isolate the charger, raise the alarm, evacuate and use a CO2 or dry-powder extinguisher. Petrol is Class B and the charger is Class C; water spreads burning fuel and creates shock risk.
Traps
- Using water on a fuel or electrical fire.
- Removing the positive battery terminal first and shorting the spanner to the body.
- Mixing waste oil with coolant or solvent, making recycling impossible.
- Working under a vehicle supported only by a jack.