Free mock exam
Testing & Commissioning — Renewable Energy & Solar PV Practice
Free topic-focused mock exam: all 11 questions on Testing & Commissioning, 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
- 11
- Time limit
- 35 min
- Pass mark
- 70% · 8/11
- Question bank
- 11
Free, no sign-up. Retake as many times as you like — the questions are reshuffled, with the answer order changed.
Sample questions
01What is the acceptable insulation resistance for a solar PV installation?
- A≥0.5MΩ
- B≥2MΩ
- C≥5MΩ
- D≥1MΩ
Why: The minimum acceptable insulation resistance for solar PV installations is 1MΩ.
02Which test verifies that the DC string conductors of a PV array are connected with correct polarity?
- AA prospective fault current test
- BAn RCD trip-time test
- CA polarity test
- DAn earth fault loop impedance test
Why: A polarity test confirms the DC positive and negative conductors are correctly identified and connected before the array is energised.
03What is the typical open-circuit voltage test range for a 10-panel string?
- A400-500V
- B500-600V
- C200-250V
- D300-400V
Why: A 10-panel string typically produces 400-500V open-circuit voltage depending on panel specifications.
Common questions
Is the Testing & Commissioning mock exam free?
Yes — 100% free, 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 towards the real qualification?
No — this is independent practice material. To gain the actual qualification you need to sit the official assessment through an approved provider.
