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100+ Free IMI EV L4 Diagnostics Practice Questions
IMI Level 4 Award in the Diagnosis, Testing and Repair of Electric/Hybrid Vehicles and Components practice questions are available now; exam metadata is being verified.
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2026 Statistics
Key Facts: IMI EV L4 Diagnostics Exam
610/0975/1
Ofqual qualification number for IMI Level 4 Diagnosis, Testing and Repair of Electric/Hybrid Vehicles and Components
tide.theimi.org.uk
Live HV scope
L4 addresses work on live high-voltage vehicle electrical components and systems (beyond L3 isolation-focused repair)
IMI 610/0975/1 purpose statement
L3 prerequisite
Requires IMI Level 3 EV system repair/replacement (or equivalent); ~6 months experience commonly recommended
IMI/provider entry guidance
~£600–£1,000+VAT
Typical approved-centre course package range (confirm locally)
Provider fee examples 2025–2026
IMI Level 4 EV/hybrid live HV diagnosis, testing and repair award (610/0975/1). Practical + oral + written/online knowledge; requires Level 3 first. Typical centre packages ~£600–£1,000 + VAT for 2–3 days. This free bank: 100 MCQs at 20% across five syllabus themes.
Sample IMI EV L4 Diagnostics Practice Questions
Try these sample questions to test your IMI EV L4 Diagnostics exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1On an EV traction battery pack, what is the main reason modules may be arranged in a series string?
A.To increase pack voltage to the level required by the inverter and motor system
B.To reduce pack voltage while increasing only the 12 V accessory capacity
C.To eliminate the need for a battery management system
D.To increase pack capacity (Ah) without raising pack voltage
Explanation: To increase pack voltage to the level required by the inverter and motor system. Series connection adds voltages so the pack can reach hundreds of volts needed by traction inverters.
2Connecting identical cells in parallel primarily increases which pack parameter?
A.Nominal voltage only, with no change to capacity
B.Available capacity (ampere-hours) and current capability at approximately the same voltage
C.Insulation resistance of the orange HV cables alone
D.The mandatory UNECE R100 cable colour requirement
Explanation: Available capacity (ampere-hours) and current capability at approximately the same voltage. Parallel connection keeps voltage roughly the same while ampere-hour capacity and current capability add.
3Ohm’s law relates which three electrical quantities?
A.Power, torque and vehicle mass only
B.Frequency, wavelength and temperature only
C.Voltage, current and resistance (V = I × R)
D.Insulation class, CAT rating and cable colour only
Explanation: Voltage, current and resistance (V = I × R). Ohm’s law is the foundational relationship used throughout LV and HV circuit diagnosis.
4Electrical power in a DC circuit is most directly calculated as:
A.P = V / I only, regardless of circuit type
B.P = I × R² with no voltage term ever used
C.P equals insulation resistance in megohms
D.P = V × I (power equals voltage times current)
Explanation: P = V × I (power equals voltage times current). Electrical power is the product of voltage and current in basic DC analysis used on vehicle systems.
5In many BEV traction systems, the inverter converts:
A.High-voltage DC from the traction battery into controlled AC (or pulsed waveforms) for the traction motor, and can convert regenerated energy back toward the pack
B.HV AC from the motor into unregulated 230 V domestic mains for workshop sockets
C.Only cabin USB power with no motor role
D.12 V battery current into HV pack voltage without any switching devices
Explanation: High-voltage DC from the traction battery into controlled AC (or pulsed waveforms) for the traction motor, and can convert regenerated energy back toward the pack. The traction inverter is the power-electronics bridge between the DC pack and the AC/brushless motor.
6A three-phase AC traction motor typically requires which form of supply from the power electronics?
A.A single unchanging DC voltage with no switching
B.Three phase-shifted AC waveforms (or equivalent controlled phases) to produce a rotating magnetic field
C.Only a 5 V logic rail with no power stage
D.Purely mechanical drive from the 12 V starter motor
Explanation: Three phase-shifted AC waveforms (or equivalent controlled phases) to produce a rotating magnetic field. Three-phase supplies create the rotating field that produces continuous torque in AC traction motors.
7What is the typical role of the DC-DC converter on an EV/HEV relative to the low-voltage system?
A.Step 12 V up to create the entire traction pack voltage without any HV battery
B.Replace the need for contactors in every architecture
C.Step high-voltage DC down to support and charge the low-voltage (often 12 V) electrical system
D.Provide only tyre pressure monitoring with no electrical conversion
Explanation: Step high-voltage DC down to support and charge the low-voltage (often 12 V) electrical system. The DC-DC converter fills the role an alternator plays on conventional vehicles for the LV system.
8When measuring insulation resistance on an HV component, which meter characteristic is most important?
A.Any cheap continuity buzzer is always sufficient for HV insulation proof
B.A standard low-voltage ohmmeter used only at a few volts of test potential
C.A clamp meter alone, because current measurement proves insulation integrity
D.A suitably rated insulation tester (megohmmeter) used at the manufacturer-specified test voltage and method
Explanation: A suitably rated insulation tester (megohmmeter) used at the manufacturer-specified test voltage and method. Insulation integrity is verified with a rated megohmmeter at the OEM-specified test voltage and method.
9CAT (measurement category) ratings on a multimeter primarily indicate:
A.The transient overvoltage environment the meter is designed to withstand at specified working voltages
B.The colour of the orange HV loom only
C.The maximum continuous DC current the meter leads can carry indefinitely
D.The vehicle’s MOT class exclusively
Explanation: The transient overvoltage environment the meter is designed to withstand at specified working voltages. CAT ratings tell you which transient environments a meter may safely measure in.
10In a series string of cells, if one cell develops a high-resistance open, what is the most likely pack-level effect?
A.Pack voltage always doubles automatically
B.Current through the series string is interrupted or severely limited, and the BMS will typically flag a severe fault
C.Insulation colour changes from orange to green
D.The 12 V battery becomes a traction battery
Explanation: Current through the series string is interrupted or severely limited, and the BMS will typically flag a severe fault. An open in a series string breaks the only current path through that string and triggers protection logic.
About the IMI EV L4 Diagnostics Practice Questions
Verified exam format metadata for IMI Level 4 Award in the Diagnosis, Testing and Repair of Electric/Hybrid Vehicles and Components is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.