SQA National 5 Engineering Science: complete guide to the three areas, the question paper and the assignment

SQA National 5 Engineering Science is a one-year course at SCQF level 5 (course code C823 75), building on National 4 and preparing learners for Higher Engineering Science. It is graded A to D from two assessment components: a question paper and an assignment. This page is the index: below is a map of the three areas of content, the assessment structure, and how to study each one.

The three areas of SQA National 5 Engineering Science

The course specification organises the content into three areas. Two are the technical heart of the course, and the third sets them in context.

Engineering contexts and challenges

The wider world of engineering: the main engineering disciplines (mechanical, electrical, electronic, civil, structural, chemical); the environmental, social and economic impact of engineering and what sustainability means; renewable and non-renewable energy sources and how energy is transformed; and an overview of the assessment and the engineering design process used in the assignment.

Electronics and control

The universal systems model (input, process, output) and block diagrams; analogue electronics with Ohm's law, power and resistors in series and parallel; the voltage divider with the LDR and thermistor as sensors; transistor switching of output devices; the operational amplifier as a comparator and inverting amplifier; digital logic gates and truth tables; combinational logic with NAND and NOR and Boolean expressions; and programmable control with microcontrollers and flowcharts.

Mechanisms and structures

Forces, mass and weight, and the relationships $W = mg$ and $F = ma$; levers and moments; gear systems and the gear ratio; belt and chain drives and the velocity ratio; mechanical advantage and efficiency; work and power; pressure and pneumatic systems; structures with tension and compression and the reactions of a loaded beam; and the properties and selection of engineering materials.

Course assessment

The National 5 Engineering Science award is graded A to D and is made up of two components, both set and marked to SQA standards.

• Question paper - sat under exam conditions. It tests demonstrating and applying knowledge and understanding of engineering, including calculations, and the application of skills to unseen engineering situations. An Engineering Science data booklet of formulae is provided.
• Assignment - a practical design-and-build task completed over time. A candidate analyses a brief, writes a specification, develops and simulates a solution (a circuit, mechanism or structure), and evaluates how well it meets the brief.

The two components combine to give the overall award.

Working from the data booklet

National 5 Engineering Science is calculation-heavy, but the data booklet provides the formulae, so the examined skill is selecting the right relationship, substituting correctly and quoting the unit. The relationships you must be able to use include Ohm's law and power, the voltage divider and op-amp gain in electronics, and the gear and velocity ratios, mechanical advantage, efficiency, $W = mg$, $F = ma$, moments, work, power and pressure in mechanisms and structures. Practise selecting and using them until it is automatic.

How to study SQA National 5 Engineering Science

Engineering Science rewards precise calculation and precise language.

1. Work from the course specification. Each content point is a checklist; question-paper items are written from them.
2. Drill selecting relationships. The data booklet is provided, so the skill is choosing the right one, substituting and quoting the unit. Mind the units throughout.
3. Learn the explanation topics exactly. Systems diagrams, transistor switching, logic-gate rules, ties versus struts and material properties all earn marks for precise wording.
4. Apply to unfamiliar contexts. Many marks come from interpreting circuits, mechanisms and structures you have not seen before.
5. Practise past papers. Use SQA past papers and marking instructions to learn the question style and the wording markers reward.

The three areas, key area by key area

Each area has key-area answer pages with worked questions and cross-links, plus an overview guide and a quiz:

• Engineering contexts and challenges - the disciplines, sustainability and impact, energy, and the assignment.
• Electronics and control - systems, analogue and digital electronics, the op-amp, logic and programmable control.
• Mechanisms and structures - forces, gears, pulleys, efficiency, work, pneumatics, structures and materials.

For the official course specification

The SQA publishes the full National 5 Engineering Science course specification, data booklet, specimen and past papers, and marking instructions at sqa.org.uk. Always revise from the current specification and SQA past papers, because question style and terminology are board-specific.