Free mock exam
Wiring & Installation — Instrumentation Practice
Free topic-focused mock exam: all 18 questions on Wiring & Installation, drawn from the wider Instrumentation 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
- 18
- Time limit
- 35 min
- Pass mark
- 70% · 13/18
- Question bank
- 18
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 main advantage of twisted pair cable?
- AHigher temperature rating
- BImproved noise immunity
- CGreater flexibility
- DLower cost
Why: Twisted pair cable reduces electromagnetic interference by cancelling out induced noise in both conductors.
02What is the recommended shield connection for a 4-20mA signal cable?
- AConnect shield at both ends
- BConnect shield at receiver end only
- CConnect shield at transmitter end only
- DLeave shield unconnected
Why: Shield should be connected at the receiver end only to prevent ground loops while providing noise protection.
03What is IS barrier in instrumentation?
- AImpedance Stabiliser
- BIsolation Switch
- CIntrinsic Safety barrier
- DInsulation Separator
Why: An Intrinsic Safety barrier limits energy to safe levels for use in potentially explosive atmospheres.
Common questions
Is the Wiring & Installation 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.
