Electrical Engineering Apprentice Interview Questions UK: 8 Real Questions and What Interviewers Want

Applying for a Electrical Engineering Apprentice job in the UK? Here is what you are likely to be asked. These questions come from our Electrical Engineering Apprentice question bank of 16 questions, written for UK employers at apprentice/entry level.

Eight Electrical Engineering Apprentice interview questions, and what the interviewer is thinking

1. Can you explain Ohm's law and use it to work out the current through a 230 V heater with a resistance of 46 ohms?

Why they ask: Ohm's law is the foundation of electrical work, and this checks your basic maths.

2. What are the main hazards when working with electricity, and how do you stay safe?

Why they ask: Safety is the first thing an electrical employer assesses in an apprentice.

3. What is the difference between series and parallel circuits, and where would you see each in a building?

Why they ask: This tests fundamental circuit knowledge you will use daily.

4. What does a circuit breaker or fuse do, and how is an RCD different?

Why they ask: They want to see you understand basic protective devices.

5. What do you know about BS 7671 and the Electricity at Work Regulations?

Why they ask: They check awareness of the key rules governing UK electrical work.

6. You are asked by a colleague to help wire a socket, and you notice the circuit hasn't been isolated. What do you do?

Why they ask: They are testing your safety instincts and confidence to speak up.

7. Tell me about a practical project or task you've completed, at college, school or elsewhere, that involved electrical or technical work.

Why they ask: They want evidence of practical interest and ability even without much experience.

8. Why do you want to be an electrical engineering apprentice, and what do you hope to gain from the apprenticeship?

Why they ask: They want to confirm genuine commitment, since apprenticeships represent a large investment.

A sample answer to question 1

Can you explain Ohm's law and use it to work out the current through a 230 V heater with a resistance of 46 ohms?

Ohm's law says that voltage equals current multiplied by resistance, so V equals I times R. Rearranged, current equals voltage divided by resistance. For the heater, that is 230 divided by 46, which gives 5 amps. I can also work out the power using P equals V times I, so 230 times 5 gives 1,150 watts, or about 1.15 kilowatts. That is useful, because it tells me what size of fuse or breaker would suit the circuit, and what cable could carry the load. If the resistance were lower, the current would be higher for the same voltage, which is why a short circuit is so dangerous: resistance is almost zero, so the current is huge. I have practised these calculations in my college work, and I like to double-check by estimating the answer before using the calculator, to catch any mistakes with decimal places or units.

Common mistake to avoid: Mixing up the formula; forgetting units

Want the rest?

Full model answers, key points and common mistakes for all 16 questions are on the Electrical Engineering Apprentice interview questions page. The first five are free, no sign-up needed.