Free mock exam
Test Equipment — Level 3 Fault Diagnosis Practice
Free topic-focused mock exam: all 30 questions on Test Equipment, drawn from the wider Level 3 Fault Diagnosis 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
- 30
Free, no sign-up. Retake as many times as you like — the questions are reshuffled, with the answer order changed.
Sample questions
01A multimeter used for fault finding should have a minimum CAT rating of:
- ACAT II for the supply origin
- BCAT III for distribution circuits, CAT IV for origin
- CNo CAT rating is required for low voltage
- DCAT I for all installation work
Why: Multimeters should be rated CAT III minimum for distribution work, CAT IV for measurements at or near the origin of installation.
02What is the primary function of an insulation resistance tester (megger)?
- AMeasure the load current drawn by a circuit
- BMeasure the earth fault loop impedance
- CVerify the trip time of an RCD
- DTest insulation quality between conductors or to earth
Why: An insulation resistance tester applies a DC test voltage to measure the resistance of insulation between conductors or between conductor and earth.
03When using a voltage tester, you should first:
- ARemove the fused probes to improve sensitivity
- BConnect it across the supply for several minutes
- CProve the tester works on a known live source
- DSet it to the highest current range available
Why: The prove-test-prove sequence requires checking the tester on a known live source before and after testing to ensure it's working correctly.
Common questions
Is the Test Equipment 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.
