Free mock exam
Fault Finding — Instrumentation Practice
Free topic-focused mock exam: all 10 questions on Fault Finding, 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
- 10
- Time limit
- 35 min
- Pass mark
- 70% · 7/10
- Question bank
- 10
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 first step in systematic fault finding?
- AObserve the symptoms and gather information
- BIsolate and lock off the entire control loop
- CRecalibrate the transmitter to its original range
- DReplace the most likely failed component immediately
Why: Systematic troubleshooting begins with observing symptoms, gathering information, and understanding the problem before testing.
02If a 4-20mA loop signal sits steadily at 3.8mA, what is the most likely cause?
- AAn under-range fault or transmitter diagnostic alarm condition
- BExcessive supply voltage applied to the loop
- CElectrical noise coupled onto the signal cable
- DThe process variable has exceeded the upper range value
Why: A signal held just below 4mA is a standard NAMUR NE43 under-range / fault indication used by transmitters to flag an out-of-range reading or internal failure.
03What tool is used to simulate a transmitter output for testing?
- AOscilloscope
- BMultimeter
- CLoop calibrator
- DPower supply
Why: A loop calibrator can source precise current signals to simulate transmitter outputs for testing purposes.
Common questions
Is the Fault Finding 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.
