100+ Free IMI EV L3 Repair Practice Questions

Prepare for the IMI Level 3 Award / Technical Specialist in Electric/Hybrid Vehicle System Repair and Replacement exam with instant access — no signup required.

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2026 Statistics

Key Facts: IMI EV L3 Repair Exam

610/3970/6

Live Ofqual qualification number for IMI Level 3 Technical Specialist in EV/HEV System Repair and Replacement (from Aug 2025)

tide.theimi.org.uk

603/1468/0

Legacy L3 Award — registrations closed 31 Dec 2025; certification end 31 Dec 2026

tide.theimi.org.uk

EV2.2 + EV3

Two mandatory units: embedded L2 routine-maintenance content plus L3 HV repair skills

IMI qualification purpose / provider outlines

~£500–£700+VAT

Typical approved-centre L3 course package range (confirm locally)

Provider fee examples 2025–2026

IMI Level 3 EV/hybrid HV repair & replacement award (610/3970/6 Technical Specialist; legacy 603/1468/0). Online MCQ + practical isolation/HV R&R. Typical centre packages ~£500–£700 + VAT for 1–2 days (often combined with L2). This free bank: 100 MCQs at 25% across four syllabus themes.

Sample IMI EV L3 Repair Practice Questions

Try these sample questions to test your IMI EV L3 Repair exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1What is the primary role of the traction battery pack on an electric or plug-in hybrid vehicle?

A.Store high-voltage DC energy that supplies the inverter and traction motor under BMS control

B.Generate three-phase AC directly for cabin HVAC blowers only

C.Eliminate the need for any low-voltage electrical system on all designs

D.Serve only as a mechanical inertia device with no electrical energy storage

Explanation: The traction pack is the high-voltage energy store. Contactors and the BMS enable controlled delivery of DC to power electronics that drive the motor and accept regenerative charge.

2What does a battery management system (BMS) primarily monitor and control?

A.Only 12 V battery open-circuit voltage with no cell-level data

B.Cell/module voltages, temperatures, state of charge/health limits, and contactor enable logic for pack protection

C.Only ABS wheel-speed sensor outputs for stability control

D.Only HVAC cabin blower PWM duty cycle

Explanation: The BMS protects the pack by supervising electrical and thermal limits and by controlling when contactors may close. It is central to safe HV system operation.

3What is the main function of the HV contactors in a traction battery system?

A.Convert 12 V AC into grid-frequency three-phase power

B.Measure tyre temperature during charging

C.Galvanically connect or isolate the pack from the vehicle HV bus under BMS/ECU control

D.Replace the need for orange cable identification

Explanation: Contactors are the controlled switches that connect the pack to the HV distribution when the system is READY/authorised, and open to isolate the bus when shut down or faulted.

4What does the traction inverter primarily do?

A.Step 230 V AC workshop mains down to charge only the 12 V battery

B.Provide the sole mechanical differential gearing for the axle

C.Store kinetic energy as compressed air

D.Convert pack DC into controlled motor excitation (typically three-phase) and manage regenerative energy return toward the pack

Explanation: Power electronics in the inverter control motor torque/speed from DC pack energy and reverse energy flow during regeneration within system limits.

5What is a typical function of the DC-DC converter on an EV/HEV?

A.Step high-voltage DC down to support and charge the low-voltage (usually 12 V) system

B.Increase tyre grip by modulating ABS only

C.Replace the need for a BMS on every vehicle

D.Isolate the vehicle from all OEM diagnostic tools

Explanation: The DC-DC converter supplies LV loads and maintains the 12 V battery from the HV pack, analogous to an alternator’s electrical support role on ICE vehicles.

6In many EV architectures, what does the on-board charger (OBC) do?

A.Convert pack DC into propulsion torque without an inverter

B.Convert AC from EVSE into controlled DC to charge the traction battery under BMS limits

C.Replace friction brakes entirely on every model

D.Provide the only means of regenerative braking

Explanation: The OBC rectifies and controls AC charge current from AC EVSE into DC accepted by the pack, subject to BMS and thermal limits.

7Why are exposed HV cables on R100-style light vehicles finished in orange?

A.Because orange paint lowers cable resistance to zero

B.To indicate the cable carries only 5 V sensor signals

C.To identify high-voltage circuits quickly for technicians and responders

D.Because orange insulation is required only on 12 V starter cables

Explanation: Orange outer covering is the industry visual cue for HV traction wiring so personnel can recognise hazardous circuits.

8What best describes a permanent-magnet synchronous or brushless traction motor used in many EVs?

A.A purely mechanical turbine with no electrical windings

B.A 12 V starter motor permanently geared to the wheels on all BEVs

C.A fuel injector assembly mounted in the traction pack

D.A multi-phase machine controlled by the inverter; rotor magnets interact with a rotating stator field to produce torque

Explanation: Brushless/PM machines need inverter-controlled multi-phase excitation. Understanding motor/inverter pairing is core L3 powertrain knowledge.

9What is meant by ‘three-phase’ in the context of EV traction motor drive?

A.Three alternating voltage/current waveforms displaced in phase, produced by the inverter to create a rotating magnetic field

B.Three separate 12 V batteries wired only in parallel for headlights

C.Three identical orange paint coats on every HV cable

D.Three MOT test classes applied to every EV

Explanation: Inverters synthesise three-phase AC (or equivalent) so the stator field rotates and produces continuous torque in AC/brushless machines.

10How does regenerative braking interact with the hydraulic friction brakes on most electrified vehicles?

A.Friction brakes are deleted on all EVs once regeneration is calibrated

B.Regeneration recovers energy within system limits while friction brakes supply remaining deceleration demand and failsafe braking

C.Regeneration only works when the vehicle is plugged into DC fast charge

D.Hydraulic brakes charge the traction pack directly through brake fluid conductivity

Explanation: Brake blending manages motor regeneration and hydraulic braking so stopping performance and energy recovery both meet design intent.

About the IMI EV L3 Repair Exam

The IMI Level 3 Electric/Hybrid Vehicle System Repair and Replacement award (live Technical Specialist qualification 610/3970/6; legacy 603/1468/0) gives technicians the knowledge and skills to work safely on electric/hybrid vehicles while carrying out diagnostic, testing and repair activities, including remove and replace of high-voltage components. It may include vehicles that have had damage to their high-energy electrical system. It embeds EV2.2 Level 2 content and adds EV3 repair skills, and is an entry route toward IMI TechSafe™ recognition.

Assessment

Two mandatory units in the qualification structure: EV2.2 (Level 2 routine-maintenance knowledge/skills embedded) and EV3 (working safely on EV/HEV; using information; carrying out repairs on high-energy electrical systems; recording information and recommendations). Assessment: IMI online MCQ + practical HV isolation and HV component R&R. Enables remove/replace of HV components; advanced live diagnosis progresses to Level 4.

Time Limit

Not published on the public IMI L3 overview; confirm with your approved centre (related heavy EV knowledge tests are sometimes cited as 60 minutes)

Passing Score

Not published as a fixed public percentage on the IMI overview; pass required on online knowledge and practical assessments — confirm with your centre

Exam Fee

Included in approved-centre course fees (typically about £500–£700 + VAT for L3; e.g. Pelican £599 + VAT + IMI registration, Pro-Tech £695 + VAT, ITAS £500 + VAT) (Institute of the Motor Industry (IMI))

IMI EV L3 Repair Exam Content Outline

25%

HV system components and operation

Pack/BMS/contactors, inverter, DC-DC, motors, regen, HV auxiliaries and LV–HV control interactions.

25%

HV isolation and reinstatement

OEM isolation, prove-dead, residual energy, LOTO, reinstatement quality and vehicle release checks.

25%

HV safety and operational hazards

Shock/arc, thermal/chemical risks, damaged/flooded vehicles, silent movement and PPE/workplace controls.

25%

HV repair and replacement principles

OEM information use, HV R&R quality, coding, documentation, recommendations and scope vs L2/L4.

How to Pass the IMI EV L3 Repair Exam

What You Need to Know

Passing score: Not published as a fixed public percentage on the IMI overview; pass required on online knowledge and practical assessments — confirm with your centre
Assessment: Two mandatory units in the qualification structure: EV2.2 (Level 2 routine-maintenance knowledge/skills embedded) and EV3 (working safely on EV/HEV; using information; carrying out repairs on high-energy electrical systems; recording information and recommendations). Assessment: IMI online MCQ + practical HV isolation and HV component R&R. Enables remove/replace of HV components; advanced live diagnosis progresses to Level 4.
Time limit: Not published on the public IMI L3 overview; confirm with your approved centre (related heavy EV knowledge tests are sometimes cited as 60 minutes)
Exam fee: Included in approved-centre course fees (typically about £500–£700 + VAT for L3; e.g. Pelican £599 + VAT + IMI registration, Pro-Tech £695 + VAT, ITAS £500 + VAT)

Keys to Passing

Work through all 100 available questions
Review every answer and explanation
Track weak areas and revisit them
Use our AI tutor for tough concepts

IMI EV L3 Repair Study Tips from Top Performers

1Memorise the L3 boundary: after OEM isolation and prove-dead you may remove/replace HV components — but advanced live diagnosis is the Level 4 pathway.

2Drill isolation end-to-end: key control, MSD/service disconnect, wait times, meter verification, LOTO, then full reinstatement and DTC/READY checks.

3Learn the major HV replaceables: DC-DC, inverter feeds, HV cables, contactors, HV A/C compressor, PTC heater and pack interfaces — including torque, seals and coding.

4Practise writing clear repair records and customer recommendations, especially for collision/flood-damaged high-energy systems.

Frequently Asked Questions

What is the IMI Level 3 EV/hybrid system repair and replacement award?

It is an Ofqual Level 3 IMI qualification that teaches technicians to work safely on electric and hybrid vehicles while carrying out diagnostic, testing and repair activities, including removal and replacement of high-voltage components. The live successor award is 610/3970/6 (Technical Specialist); the legacy award 603/1468/0 closed to new registrations on 31 December 2025.

How is it assessed?

Candidates sit an IMI online multiple-choice knowledge assessment and complete a practical skills assessment commonly including high-voltage shutdown/isolation and removal/installation of an HV component. Exact question counts and timings should be confirmed with your approved centre.

How does Level 3 differ from Level 2?

Level 2 focuses on safe work around electrified vehicles during routine maintenance that does not involve repairing HV components. Level 3 includes the ability to remove and replace high-voltage components after correct isolation. The L3 structure embeds EV2.2 (L2 content) plus EV3 repair skills.

How much does the course cost?

Fees are set by approved centres. Published 2025–2026 examples commonly fall around £500–£700 + VAT for L3 packages (for example Pelican £599 + VAT plus IMI registration and Pro-Tech £695 + VAT), with combined L2+L3 packages often near £585–£700 + VAT. Always confirm what is included.