Engineer's Notes: learning HV by testing yourself
Retrieval beats rereading
Answering questions and getting immediate feedback fixes knowledge far better than reading notes again. Mix topics, and come back to the ones you get wrong.
Know the numbers
Interviewers and senior engineers expect quick estimates: full load current, fault level from MVA, LV fault from transformer impedance, cable withstand and grading margins. The calculation questions here build that speed.
Failures teach the most
Most HV failures come from a short list of causes: workmanship, ignored condition data, default settings, missed earthing details, incomplete documents and bypassed interlocks. The case studies walk through each one as a decision sequence.
Evidence for registration
Professional registration interviews look for what you personally did, decided and verified. Practise telling your project stories clearly, linked to standards and calculations.
Frequently asked questions
How should I prepare for an HV engineering interview?
Revise the core calculations (currents, fault levels, voltage drop, cable withstand, protection grading, touch voltage), be ready to explain safe switching, and prepare real project examples using situation, task, action and result. Practise answering out loud.
What topics does the HV question bank cover?
Regulations and voltages, networks and substations, switchgear and RMUs, transformers, cables, fault level, protection, earthing, insulation coordination, generation, testing, safety and switching, authority approvals, asset management, GIS and installation, at foundation, practitioner and expert level.
Are the case studies real incidents?
No. They are fictional composites built from common failure patterns, such as poor cable terminations, ignored DGA trends, default relay settings, fence touch voltages, missing handover documents and out-of-phase synchronising.
Is my progress saved?
Yes, in your own browser only. Answers, exam scores, case study results and self-ratings are stored locally and never sent anywhere.
What pass mark should I aim for?
Aim for 70 % or more in exam mode across mixed topics, then raise the level. Use the mastery radar to find weak topics and practise them with the matching HV Academy lab.
Topics: HV interview questions · practice exam · fault level · protection grading · earthing · insulation coordination · transformers · cables · switching safety · testing · authority approvals · DGA · GIS · case studies · competency
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