Substation Engineer practice interview
Substation equipment, switching, commissioning, defect diagnosis and coordination of safe maintenance and project work. Practise the 6 questions interviewers ask for this role with follow-ups. Paid plans add scored feedback on every answer.
Free with an Intaviu account: 320 credits a month, at 10 credits a minute of practice. Private: interview creators never see them.
- Mid level
- 20 minutes
- 6 questions
- Scored feedback on paid plans
About the role
This interview tests your working knowledge of transformers, switchgear, busbars, control systems and substation auxiliaries. The panel will look closely at switching discipline, commissioning evidence, fault diagnosis and your ability to coordinate maintenance or upgrade work safely.
How to prepare
- Review the purpose and failure indicators of transformers, breakers, disconnectors, instrument transformers and substation batteries.
- Practise explaining a switching programme, including checks, communications and safety boundaries.
- Prepare a commissioning example that covers primary plant, secondary circuits, protection and SCADA points.
- Revise how you diagnose breaker control, direct-current supply and interlocking problems.
- Think through how you manage drawing discrepancies and site changes during an outage.
Common mistakes
- Describing switching from memory without independent checks and clear confirmation points.
- Focusing on primary equipment while overlooking direct-current supplies, interlocks and secondary circuits.
- Treating energisation as the first full test of protection or SCADA interfaces.
- Allowing schedule pressure to bypass drawing control or safe access boundaries.
What to expect
A real first-round interview
6 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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