Environment and Workplace Practices
This domain covers waste segregation, used oil, coolant, refrigerant recovery, spill response, PPE, workshop housekeeping and environmental rules. The exam tests safe, legal workshop practice.
Core rules
Segregate waste at source: used engine oil, coolant, solvents, filters, batteries, tyres and metal swarf must not be mixed. Store used oil in labelled, closed containers and send it to an authorised recycler. Never pour oil, coolant or solvent into drains or soil. Recover refrigerant with approved equipment; do not vent it to atmosphere. Use absorbent for spills, then place the contaminated material in a hazardous-waste container. Wear gloves, eye protection and appropriate respiratory protection. Keep safety data sheets available.
Worked example
A 5-litre container of used engine oil is knocked over on the workshop floor. The correct response is to stop the spill, protect drains with a drain cover or absorbent sock, spread absorbent granules from the outside inward, sweep up the saturated absorbent, clean the floor with the approved degreaser, and place all contaminated material in a labelled hazardous-waste container. Record the spill and report it according to the workshop procedure. Do not wash the oil into the drain with a hose.
Traps
Mixing used oil with coolant or solvent; putting oily rags in ordinary waste; venting refrigerant; and using compressed air to clean brake dust. Brake dust may contain harmful fibres and should be removed with a wet method or vacuum extraction.