Practice Test Geeks(EVITP) Electric Vehicle Infrastructure Program Practice Test
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Technology and Equipment Flashcards

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

Read the first 7 Technology and Equipment flashcards as text

  1. An EVSE displays an 'Isolation Fault' error and refuses to start a session. What is the most likely cause?

    Answer: A leakage path has been detected between the DC bus and chassis ground

    An isolation fault indicates that the DC fast charger's monitoring circuit has detected an unacceptable leakage resistance between the high-voltage DC bus and the equipment ground.

  2. What does 'smart charging' refer to when applied to EVSE installations at a commercial site?

    Answer: Dynamically adjusting charging power based on grid demand, load limits, or pricing signals

    Smart charging dynamically modulates the charging rate of individual or multiple EVSEs in response to grid conditions, site demand limits, or time-of-use pricing.

  3. Which type of EV connector includes both AC and DC charging capability in a single inlet on the vehicle side in North America?

    Answer: Combined Charging System (CCS) Combo 1

    The CCS Combo 1 connector (SAE J1772 + DC pins) allows a single vehicle inlet to accept both AC Level 2 and DC fast charging through one combined port.

  4. A DCFC unit is equipped with a liquid-cooled cable. What is the primary advantage of this design?

    Answer: It allows the cable to carry higher currents at reduced cable weight and diameter

    Liquid-cooled cables can carry very high currents (400 A+) without overheating, allowing a thinner, lighter, more manageable cable despite the high power throughput.

  5. What is the function of a power factor correction (PFC) stage in an EVSE?

    Answer: Shape the AC input current waveform to be sinusoidal and in phase with the voltage, reducing reactive power

    PFC draws current from the AC supply in a nearly sinusoidal waveform in phase with the voltage, minimizing reactive power draw and improving overall system efficiency.

  6. Which standard defines the requirements for EV supply equipment used in residential and commercial installations in the United States?

    Answer: UL 2594

    UL 2594 is the Standard for Electric Vehicle Supply Equipment and covers safety requirements for EV charging equipment installed in the US.

  7. What is 'Plug and Charge' (ISO 15118) and how does it differ from RFID-based authentication?

    Answer: It enables the vehicle to authenticate automatically with the EVSE via encrypted certificates over the pilot line, without user action

    ISO 15118 Plug and Charge uses X.509 certificates exchanged over the Power Line Communication (PLC) pilot link so the vehicle automatically authenticates without the driver presenting a card.