Where the marks actually go
Unit A2 1 is a single paper worth 80 marks, but it holds three alternative sections: Electronic and Microelectronic Control Systems, Mechanical and Pneumatic Control Systems, and Product Design. You answer both questions in the one section that matches the specialism you studied, so the paper is effectively three different exams sharing one timetable slot. Whichever section you sit, roughly a quarter of the marks are in major design, circuit or mechanism work completed on the separate A3 pro forma answer pages, so those pages deserve as much planning time as the written questions.
The examiner reports point at the same weaknesses across every specialism: pro forma sketches without labels for pivots, bearings or component identity, QWC answers written as disconnected bullet points instead of a running discussion, and calculations that skip a step, an instroke-outstroke volume, a gear ratio direction, an atmospheric pressure addition, that the mark scheme expects to see shown.
Paper structure and timing
You have 120 minutes for 80 marks, so budget about a minute and a half per mark. Each section is built from two large questions, so roughly 60 minutes per question is a reasonable starting split, adjusted for how many marks each part carries. The 9-mark QWC question in every section is worth over a tenth of the paper on its own: plan five or six minutes just to sketch your discussion structure before you start writing continuous prose.
This paper covers half of the A2 award, 30 percent of the full A Level grade. The other half of A2, also 30 percent of the full A Level, comes from the Design and Realisation coursework project, which is not a written exam and is not covered by this page.
Where the technique pays off
Across all three sections, a small number of habits repeatedly cost marks that the underlying knowledge would have earned.
- Label everything on a pro forma sketch. Moving parts, fixed guides, bearings, pivots and dimensions all need a label. An unlabelled mechanism, however well drawn, cannot be marked as accurately.
- Write QWC as a discussion, not a list. A 9-mark answer on something like a clutch or a strain gauge needs to compare how it works, its advantages and its disadvantages in connected prose, referencing a specific practical example, not a set of separate bullet points.
- Show every step in a multi-part calculation. A pneumatic air consumption answer needs both the instroke and outstroke volumes shown separately before they are added. A gear train answer needs the driver-to-driven ratio written the right way round at each stage.
CCEA conventions to know
A2 assessment at CCEA is synoptic: this paper can still expect AS-level systems knowledge inside an A2 question, so do not treat your AS notes as finished once you move on to A2. The QWC question in each section is marked against a banded scheme, and reaching the top band means naming a specific, real product or application, not describing the theory in the abstract.
Pressure calculations in the mechanical and pneumatic section specifically test whether you know the difference between gauge and absolute pressure. Gauge pressure is what a pressure gauge reads; absolute pressure adds roughly 1.0 to 1.25 bar of atmospheric pressure on top. Mixing the two up changes every answer that follows.
The week before
Work through three or four full pneumatic cylinder consumption calculations, writing instroke and outstroke volumes as separate lines every time. Redraw a compound gear train from memory and check the ratio direction at each stage before combining them. Write one full 9-mark QWC answer to a strict nine-minute limit, using a specific named product throughout. On the day, before you start either question in your chosen section, check the A3 pro forma pages for exactly which parts belong there so you do not run out of room mid-answer.