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The EVT exam has 100 questions and runs 2 hours.
These 10 free EVT questions are organized by exam domain, so you can see how each part of the Electric Vehicle Technician blueprint is tested. Reveal the answer and explanation under each question.
During a BEV's absence-of-voltage check, a meter correctly indicates a known live DC source, then reads zero at every required vehicle test point. On the final proving check, it also reads zero on that same live source. The source is independently confirmed to remain energized. How should the technician resolve the failed verification?
Correct answer: B - Repeat the complete verification with a correctly functioning tester
A collision-damaged BEV begins to hiss from the traction-battery enclosure. The enclosure temperature is rising rapidly even though the service disconnect was removed earlier. No flame is visible. Which action takes priority?
Correct answer: B - Evacuate the area and contact emergency services from a safe location
An owner reports much less deceleration on accelerator release after an overnight full charge in cold weather. Brake-pedal stopping performance and the brake and propulsion checks are normal. Regenerative braking returns as the battery warms and its state of charge falls. What is the appropriate response to this complaint?
Correct answer: A - Explain the temporary charge-acceptance limit and expected brake-pedal use
To check a 12 V PWM output, a technician connects an approved 4.0 ohm resistive test load. The voltage across the load switches between 0 and 12.0 V at 25% duty cycle; a meter in DC mode reads 3.0 V. With the load resistance constant, what average heating power must the load dissipate?
Correct answer: B - 9.0 W, using the waveform's heating-equivalent voltage
Three sensors share a controller's 5 V reference. All three report low signals, and the reference measures 2.2 V at the controller. Disconnecting one branch restores the reference to 5.0 V and the other two signals to normal; reconnecting it reproduces the fault. The branch connector disconnects both a sensor and a section of harness. Where should the next fault-isolation step focus?
Correct answer: A - The sensor and harness section on the disconnected reference branch
A BEV's resolver signal is missing. A technician proposes using back EMF alone to establish the permanent-magnet motor's rotor angle before startup. What prevents this method from finding the angle at standstill?
Correct answer: D - A stationary rotor produces no back-EMF position signal
A battery-electric delivery van loses power on hills. During an approved load test at 25°C, all series groups initially measure about 3.75 V. Within one second at 100 A, group 41 falls to 3.26 V while the others stay at 3.64-3.67 V. It rebounds to 3.74 V when the load is removed. Independent voltage readings agree, and the intergroup connections pass loaded voltage-drop checks. Which defect best explains the behavior?
Correct answer: C - Abnormally high internal resistance in group 41
On a 400 V BEV, the precharge relay and resistor form a series path around the positive main contactor. At startup, the negative main contactor closes correctly. The inverter DC link stays at 18 V, and no current flows through the precharge path despite an active precharge command. Independent measurements confirm both voltages. Which fault accounts for the low DC-link voltage and the absence of precharge current?
Correct answer: C - An open circuit in the precharge path
At a J1772 AC station, the control pilot measured with the vehicle connected is a 1 kHz waveform with a +9 V positive plateau and a -12 V negative plateau. Duty cycle is 50%. The station reports no fault, and its output contactors remain open. Which interpretation of this signal is correct?
Correct answer: D - The vehicle is connected but has not signaled readiness to charge
A BEV will not charge and stores U019B, meaning lost communication with the battery charger control module. At the unplugged charger connector, the low-voltage feed measures 12.6 V without a load. It falls to 2.0 V with the prescribed 1 A test load attached, while the fuse supply stays at 12.6 V. The ground passes a loaded voltage-drop test. These findings point first to:
Correct answer: A - Excessive resistance in the low-voltage supply path
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