VCE VET Engineering Studies key terms

A ranked order of risk-reduction measures, from most to least reliable: eliminate the hazard, substitute it, isolate it, use engineering controls, apply administrative controls, then use personal protective equipment.

A structured process of identifying hazards, judging how likely and how severe any harm could be, and deciding which controls are needed before work starts.

Clothing and gear worn by a worker, such as safety glasses, gloves, hearing protection and safety boots, that reduces exposure to hazards but does not remove them.

A written document describing how a high-risk task will be carried out, listing the hazards, the controls to be used, and the sequence of steps workers must follow.

A procedure in which an energy source is switched off, physically locked and tagged so machinery cannot be restarted while maintenance or cleaning is being performed.

Disconnecting a machine or circuit from all energy sources, including electricity, compressed air and hydraulics, and proving it is de-energised before work begins.

Any chemical or material that can harm health, such as solvents, adhesives, coolants or dusts; it must be stored, labelled and handled according to its safety data sheet.

A standard document supplied with a hazardous chemical that sets out its hazards, safe handling and storage requirements, first-aid measures and disposal advice.

Separating waste streams such as metal swarf, plastics, oils, solvents and general rubbish so each can be recycled, re-used or disposed of correctly without contaminating the others.

Physical barriers, interlocks or enclosures fitted around moving parts of machinery to prevent a person's hands, clothing or body from reaching a danger zone.

A prominent red control that immediately halts a machine's motion when pressed; it must be reset deliberately before the machine can be restarted.

A measuring instrument with a fixed main scale and a sliding vernier scale, used to read outside, inside and depth dimensions to a resolution of typically 0.02 mm.

A precision measuring instrument using a calibrated screw and thimble to measure small thicknesses or diameters, commonly reading to 0.01 mm with a resolution of 0.001 mm on some models.

The smallest change in a quantity that a measuring instrument can display or that a scale can be read to, which sets the limit on the precision of any measurement taken.

The total permissible variation in a dimension, expressed as an upper and lower limit, so a part still functions when made anywhere within that allowed range.

The relationship between the sizes of two mating parts, such as a shaft and hole, ranging from a clearance fit that moves freely to an interference fit that must be pressed together.

A reference point, line or surface from which dimensions are measured on a drawing, so that all features are located consistently from a known origin.

A drawing method that shows a three-dimensional object as separate front, top and side views arranged in a standard layout, with hidden detail drawn as dashed lines.

A technical drawing in which all dimensions are reduced or enlarged by a stated ratio, such as 1:10, while keeping every proportion of the real object accurate.

A metal whose main constituent is iron, such as mild steel, cast iron or stainless steel; ferrous metals are generally magnetic and can rust unless protected or alloyed.

A metal that contains little or no iron, such as aluminium, copper, brass or titanium; these are generally not magnetic and resist corrosion well but are often softer or more costly.

A material made by melting and mixing two or more elements, at least one being a metal, to produce properties better suited to a purpose than any single ingredient alone.

Controlled heating and cooling of a metal to change its internal structure and therefore its hardness, strength or machinability, using processes such as annealing, hardening and tempering.

A polymer that softens when heated and can be re-melted and reshaped repeatedly, making it easy to recycle and suitable for processes such as injection moulding and vacuum forming.

A plastic that cures permanently when heated or mixed with a hardener and cannot be re-melted, giving good heat resistance and rigidity but making recycling difficult.

A permanent joining process in which the edges of two parts are melted, usually with a filler rod, so they fuse into one continuous piece as the joint cools.

A joining process in which a filler metal with a lower melting point than the parts is melted and drawn into the joint gap by capillary action, without melting the parent metal.

A permanent fastening method in which a ductile pin is passed through aligned holes and its tail is deformed to clamp the parts together, often used for sheet metal and aircraft work.

Unwanted bending, twisting or warping of a workpiece caused by uneven heating, cooling or internal stresses, especially during welding or machining of thin sections.

A work-holding device that locates and clamps a component while guiding the cutting tool, so repeated parts are made accurately and quickly without marking out each time.

A device that holds and locates a workpiece securely during machining or assembly but does not guide the tool, ensuring each part sits in the same position.

A bar chart that plots project tasks against a timeline, showing start and finish dates, task duration and overlap so progress and dependencies can be monitored.

The sequence of dependent tasks in a project that takes the longest total time; any delay to a task on this path delays the whole project's completion date.

A hierarchical diagram that splits a project into progressively smaller, manageable tasks and deliverables, forming the basis for scheduling, costing and assigning responsibility.

A short written statement from a client or teacher that defines the problem to be solved, the intended user, the constraints and the criteria by which the solution will be judged.

Meeting present needs without compromising the ability of future generations to meet theirs, achieved in engineering by reducing material and energy use, reusing parts and recycling waste.

A technique that evaluates the environmental impact of a product across its whole life, from raw material extraction and manufacture through use to disposal or recycling.

The planned systems and procedures, such as inspection, calibration and documented checks, that ensure work consistently meets the specified standard rather than fixing faults afterwards.

A short, informal briefing held at the worksite before a task in which the team reviews the hazards, controls, sequence of work and individual responsibilities for the day.

A structured training pathway combining paid on-the-job work with off-the-job study, leading to a nationally recognised trade qualification in an engineering-related occupation.