Tools, Materials and Workshop Safety
What this domain tests
Tools, Materials and Workshop Safety tests safe selection and use of hand and power tools, basic material properties, measurement, and workshop discipline. Questions often describe a task and ask for the correct tool, material, or safety action.
Core rules
- Use the tool sized for the fastener: spanner size is the distance across flats, not the thread diameter.
- Keep screwdriver tips matched to screw heads; a loose fit rounds the slot.
- Hacksaw blades: coarser teeth for thick solid stock, finer teeth for thin tube and sheet to avoid snagging.
- Ferrous metals contain iron and are magnetic; non-ferrous metals include aluminium, copper, and brass.
- Material properties: hardness resists scratching; ductility allows drawing into wire; malleability allows shaping by hammering; conductivity carries heat or current.
- PPE and guards are required where risk exists; isolate power and lock off before maintenance.
Worked example
You need to remove a standard M10 hex bolt. Do you choose a 10 mm spanner because the thread is M10? No. M10 is the thread size; the spanner fits the hexagon across flats, commonly 17 mm for a standard bolt. Measure the flats or test the fit without forcing. Use a ring or socket spanner where possible, apply force steadily, and pull rather than push an open-end spanner when space allows.
Traps
- Using a cheater bar on a spanner or ratchet and damaging the tool or fastener.
- Wearing gloves near rotating machinery where they can be caught.
- Using a coarse blade on thin-walled tube and stripping teeth.
- Assuming 'stainless' means immune to every corrosive environment.