Viva practice
Exam-style questions generated from the component library — practice like it's the real viva.
Instant feedback after every question, with worked solutions.
Every question is multiple choice with 4 options. Components you've missed before show up more often, rounds rotate through the question bank so repeats stay rare, and "All categories" rounds mix in circuit-law calculations.
What the heavy electrical / power distribution quiz asks
Questions are generated from this site’s own reference pages for the 16 heavy electrical / power distribution parts below — transformers, contactors, busbars — the big stuff. Because each one is built from a specific field of a specific part, a wrong answer always has somewhere to send you: the component page the question came from. Nothing here is a fixed question list, so no two runs are identical.
Question types in this category
Example questions
The real prompts, shown against the distribution board / panel.
- How do you choose the right Distribution Board / Panel for a job?
- What are the common ways a Distribution Board / Panel fails?
- What does a Distribution Board / Panel do?
- Which key specs matter when choosing a Distribution Board / Panel?
- How do you read the value or markings on a Distribution Board / Panel?
Parts you’ll be asked about
Every one has a reference page with specs, testing procedure and failure modes.
- Distribution Board / Panel
- Contactor
- Motor Starter (DOL / Star-Delta)
- Overload Relay
- VFD / Variable Frequency Drive
- Energy Meter
- Busbar / Bus Duct
- Capacitor Bank (PFC)
- Earthing / Grounding Components
- Sockets, Plugs, Switches (wiring devices)
- Lightning / Surge Arrester
- Isolator / Changeover Switch
- HV Circuit Breakers (VCB / ACB / SF6)
- Protective Relay (Overcurrent / Differential / Distance)
- Line Insulators & Conductors (Pin / Disc / ACSR)
- Heating Element (Nichrome / Appliance Elements)