Practice Test Geeks(EVT) Certified Electric Vehicle Technician Practice Test
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EVT Charging Systems & Infrastructure Flashcards

6 cards from real EVT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 EVT Charging Systems & Infrastructure flashcards as text

  1. What does a Ground Fault Circuit Interrupter (GFCI) monitor in an EVSE installation to protect users?

    Answer: Current imbalance between hot and neutral conductors

    A GFCI detects a difference between the current on the hot and neutral conductors—indicating current is leaking to ground—and interrupts the circuit.

  2. A DC fast charger rated at 150 kW charges a vehicle with a 400V battery pack. Approximately how many amps does it deliver?

    Answer: 375 A

    Current = Power / Voltage = 150,000 W ÷ 400 V = 375 A.

  3. What is the primary function of the on-board charger (OBC) in an electric vehicle?

    Answer: Convert AC grid power to regulated DC for battery charging

    The OBC converts AC supply voltage from the grid or EVSE into the correct DC voltage and current needed to charge the high-voltage battery pack.

  4. When inspecting a CHAdeMO DC fast-charge port, a technician notices severe corrosion on the large power pins. What is the FIRST corrective action?

    Answer: Tag out, remove from service, and replace the inlet assembly

    Corroded high-current DC inlet pins can cause arcing, overheating, or fire; the inlet must be taken out of service and replaced before reuse.

  5. Which EVSE level provides the fastest charging rates currently available to passenger EVs at public stations in the US?

    Answer: DC Fast Charge (Level 3)

    DC Fast Charge (Level 3) stations deliver power directly as DC at up to 350+ kW, far exceeding Level 1 and Level 2 AC rates.

  6. What does a 'State B' Control Pilot signal (CP oscillating between +9V and -12V) indicate in a J1772 session?

    Answer: Vehicle connected, not ready to accept energy

    State B (CP between +9V and −12V, PWM present) means the vehicle is connected and detected, but the vehicle has not yet closed its contactors to accept power.