Free mock exam
System Design — Renewable Energy & Solar PV Practice
Free topic-focused mock exam: 30 random questions from a pool of 32 on System Design, drawn from the wider Renewable Energy & Solar PV bank. 35-minute timer, 70% to pass, worked explanation on every question. Use this when you've taken the full mock once and want to drill the topics you got wrong.
- Questions
- 30
- Time limit
- 35 min
- Pass mark
- 70% · 21/30
- Question bank
- 32
Free, no sign-up. Retake as many times as you like — different questions each time.
Sample questions
01What is the primary function of a solar inverter?
- AStore energy
- BConvert DC to AC
- CProvide system earthing
- DRegulate the voltage
Why: The primary function of a solar inverter is to convert DC electricity from panels to AC for use in homes and the grid.
02Which inverter type is best for installations with partial shading?
- AOff-grid inverter
- BString inverter
- CMicro inverters
- DCentral inverter
Why: Micro inverters perform best with partial shading as each panel operates independently.
03What is the optimal tilt angle for solar panels in London?
- A55°
- B25°
- C35°
- D45°
Why: About 35° gives close to the best year-round output in London; steeper favours winter and flatter favours summer. The old 'tilt equals latitude' rule would give about 51°, which over-weights the winter months.
Common questions
Is the System Design mock exam free?
Yes, it is free with no sign-up needed. Questions are pulled at random from a substantial bank, with a worked explanation on every question after you submit.
Can I retake the mock exam?
Yes. Every attempt picks a different random selection and reshuffles the options, so each retake gives you genuinely new questions. No limit on retakes.
Does this count as a qualification?
No. This is independent practice material and does not award a qualification, card or certificate. Where a subject has a formal qualification or card, you gain it through an approved provider.