100+ Free National 5 Engineering Science Practice Questions
Prepare for the National 5 Engineering Science (Scotland) exam with instant access — no signup required.
Loading practice questions...
Explore More Scottish Qualifications (National 5, Higher, Advanced Higher)
Continue into nearby exams from the same family. Each card keeps practice questions, study guides, flashcards, videos, and articles in one place.
Key Facts: National 5 Engineering Science Exam
C823 75
Course code
Qualifications Scotland
160 marks
Total marks (110 paper + 50 assignment)
N5 Engineering Science Course Specification
1h 50m
Question paper duration
Qualifications Scotland
100
Free practice questions here
OpenExamPrep
N5 Engineering Science is graded A-D with C as the minimum pass. The 110-mark question paper (1 hour 50 minutes, 69% of the award) covers analogue and digital electronics, pneumatics, mechanisms, structures, and systems control; a 50-mark assignment completes the 160-mark total.
Sample National 5 Engineering Science Practice Questions
Try these sample questions to test your National 5 Engineering Science exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1In a universal system diagram for an engineering system, which element represents the boundary between the internal components and the external environment?
2What is the primary function of an input transducer in an electronic control system?
3Which of the following describes an open-loop control system?
4Which component in a closed-loop control system compares the desired setpoint with the actual measured output?
5Which energy source is classified as a non-renewable energy resource?
6What key environmental benefit is achieved by increasing the energy efficiency of an industrial machine?
7An electric motor takes in 500 J of electrical energy and converts 400 J into useful kinetic energy. What is the efficiency of the motor?
8A solar panel produces 150 W of useful electrical power from 1000 W of incident solar light power. What is its efficiency?
9In a block diagram for a sub-system, what does a single arrow entering a process block represent?
10A heating sub-system consumes 2.4 kW of electrical power to supply 1.8 kW of useful thermal energy to a room. How much power is wasted as unrecoverable heat in the wiring and housing?
About the National 5 Engineering Science Exam
National 5 Engineering Science (course code C823 75) is a Scottish Credit and Qualifications Framework (SCQF) Level 5 qualification administered by Qualifications Scotland (formerly SQA). The course develops understanding of engineering principles across three main areas — Engineering Contexts and Challenges, Electronics and Control, and Mechanisms and Structures — combining theoretical knowledge with practical calculations, circuit design, flowcharts, and structural analysis.
Assessment
Question count not published by the exam provider
Time Limit
Question paper 1 hour 50 minutes; the assignment is completed in up to 8 hours
Passing Score
Graded A-D, with No Award below D. Notional grade boundaries are 50% of the total course assessment marks for a C, 70% for an A and 85% for an upper A; final boundaries are set each year at awarding meetings after marking.
Exam Fee
No candidate fee is published by Qualifications Scotland: entry fees are invoiced to the presenting centre, so school and college candidates in Scotland are not charged. Private candidates must arrange an approved presenting centre, which sets its own charge. (Qualifications Scotland (formerly SQA))
National 5 Engineering Science Exam Content Outline
Engineering Contexts and Challenges — Systems Approach
System diagrams (inputs, processes, outputs, feedback, boundary), sub-systems, open-loop vs closed-loop control systems, and sensor feedback mechanisms
Engineering Contexts and Challenges — Energy & Impacts
Energy forms and conversions, energy conservation, system efficiency calculations, and social, economic, and environmental impacts of engineering projects
Electronics and Control — Analogue Electronics
Ohm's law (V=IR), electrical power (P=VI, P=I²R, P=V²/R), series and parallel circuits, and component characteristics (resistors, LEDs, buzzers, switches)
Electronics and Control — Potential Dividers & Transistors
Potential divider calculations, input transducers (LDRs, thermistors), NPN bipolar junction transistor switches, N-channel MOSFET switches, and base resistor sizing
Electronics and Control — Operational Amplifiers & Digital Logic
Op-Amps as voltage comparators, digital logic gates (AND, OR, NOT, NAND, NOR, XOR), truth tables, Boolean expressions, and combinational logic design
Electronics and Control — Microcontroller Systems
Microcontroller system architecture, flowchart symbols and logic (decisions, loops, subroutines), PBASIC/pseudocode operations, and input/output control
Mechanisms and Structures — Gear Ratios & Drive Systems
Spur gears, velocity ratio (VR), compound gear trains, idler gears, torque, belt and pulley drives, and chain and sprocket systems
Mechanisms and Structures — Pneumatic Systems & Calculations
Single and double-acting cylinders, 3/2 and 5/2 directional control valves, flow control valves, shuttle valves, reservoirs, and force/pressure calculations (P=F/A)
Mechanisms and Structures — Work, Power & Efficiency
Work done (W=Fd), power (P=W/t), mechanical advantage, and efficiency calculations for mechanical systems
Mechanisms and Structures — Structural Analysis & Forces
Framework structures, ties and struts, concurrent force systems, vector diagrams, moments (M=Fd), and support reaction forces for simply supported beams
How to Pass the National 5 Engineering Science Exam
What You Need to Know
- Passing score: Graded A-D, with No Award below D. Notional grade boundaries are 50% of the total course assessment marks for a C, 70% for an A and 85% for an upper A; final boundaries are set each year at awarding meetings after marking.
- Assessment: Question count not published by the exam provider
- Time limit: Question paper 1 hour 50 minutes; the assignment is completed in up to 8 hours
- Exam fee: No candidate fee is published by Qualifications Scotland: entry fees are invoiced to the presenting centre, so school and college candidates in Scotland are not charged. Private candidates must arrange an approved presenting centre, which sets its own charge.
Keys to Passing
- Complete 500+ practice questions
- Score 80%+ consistently before scheduling
- Focus on highest-weighted sections
- Use our AI tutor for tough concepts
National 5 Engineering Science Study Tips from Top Performers
Frequently Asked Questions
Who awards National 5 Engineering Science?
National 5 Engineering Science is awarded by Qualifications Scotland, the awarding body for Scottish national qualifications since 1 February 2026 (formerly known as SQA). The course code is C823 75.
How is National 5 Engineering Science assessed?
A 110-mark question paper lasting 1 hour 50 minutes is combined with a 50-mark practical assignment completed in up to 8 hours, giving a total of 160 marks. The assignment involves design, simulation, calculation, and evaluation tasks set by Qualifications Scotland.
What grade is a pass at National 5?
National 5 is graded A, B, C, and D, with C being the minimum standard pass and A the highest. Candidates who score below Grade D receive 'No award'.
What mathematical and technical skills are required?
Candidates need algebra skills to manipulate formulas for Ohm's law, potential dividers, pneumatic force/pressure, gear ratios, moments, and beam reactions, as well as the ability to draw and interpret logic diagrams, flowcharts, and pneumatic circuit diagrams.