Pro practiceSenior Protection and Control Engineer practice interview
Protection studies, relay settings, scheme coordination, disturbance analysis and safe commissioning of substation control systems. Practise the 5 questions interviewers ask for this role with follow-ups. Paid plans add scored feedback on every answer.
A Pro practice interview, on the Pro plan from ₦5,000 a month billed yearly, or on Premium.
- Senior
- 20 minutes
- 5 questions
- Scored feedback on paid plans
About the role
This interview tests whether you can design, review and commission protection and control schemes for substations and power networks. The panel will look for disciplined fault analysis, strong relay coordination and evidence that you protect people and equipment when operational pressure is high.
How to prepare
- Review differential, distance, overcurrent, earth fault and breaker failure protection principles and their common application limits.
- Practise explaining a coordination study from fault levels and CT ratios through to time and current settings.
- Prepare an example where oscillography, event records or SCADA data changed your diagnosis of a trip.
- Revise commissioning controls for CT circuits, trip circuits, interlocks, communications and settings files.
- Think through how you approve, version and communicate a protection settings change on an energised network.
Common mistakes
- Listing relay functions without explaining selectivity, sensitivity, speed and dependability.
- Treating a successful secondary injection as proof that the complete trip path works.
- Changing settings before confirming system conditions, CT data and the approved coordination basis.
- Ignoring configuration control and the operational consequences of an incorrect settings file.
What to expect
A real first-round interview
5 questions the way interviewers ask for this role, with follow-ups when an answer needs more.
Spoken, like the real thing
Speak your answers in your browser or the free desktop app, with live captions. You can ask the interviewer to repeat anything.
Scored on 4 areas
The things this interview weighs most. With a paid plan, your report shows how you did on each one.
A private report
On Plus, Pro and Premium: every answer scored, your strongest lines quoted and what to say differently next time. Interview creators never see it.
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