Workplace safety, tools and workshop practice
Workplace safety, tools and workshop practice
This domain tests safe workshop behavior and correct tool use: PPE, lifting, hand and power tools, measuring, torque, hazardous waste, and housekeeping.
Core rules and concepts
- PPE: safety glasses, gloves, and steel-toe boots; eye protection is required for grinding, compressed air, and battery charging.
- Lift safely: jack under rated points, then jack stands; chock wheels; never work under a vehicle held only by a jack.
- Hand tools: use the correct size; pull rather than push; do not use chrome sockets on an impact wrench; inspect hammers and chisels.
- Torque: use a calibrated wrench, clean threads, and the correct sequence; replace torque-to-yield fasteners.
- Measuring: zero-check micrometers and verniers; use a feeler gauge for valve clearance and a dial indicator for runout.
- Chemicals and waste: label fluids, keep safety data sheets, do not mix coolant and oil, and dispose of waste correctly.
- Compressed air: never clean skin or clothes; use low pressure and a safe nozzle.
Worked example
Cylinder head bolts require 40 N·m plus 90°. Use a calibrated torque wrench in sequence, then an angle gauge. Reusing stretch bolts can lose clamp load. If the wrench is dropped, check calibration before use.
Traps that cost marks
Using a torque wrench as a breaker bar; no wheel chocks; compressed air on clothing; the wrong socket size; and leaving oil spills on the floor.