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. Which standard governs the wireless charging (inductive) of electric vehicles in North America?

    Answer: SAE J2954

    SAE J2954 is the standard that defines wireless power transfer (WPT) for light-duty plug-in and electric vehicles, including interoperability and safety requirements.

  2. In a bidirectional charging setup (V2G), what additional capability must the EVSE hardware include compared to a standard charger?

    Answer: An inverter capable of converting DC from the vehicle battery back to AC grid power

    V2G (Vehicle-to-Grid) requires the EVSE to include an inverter so that DC energy from the vehicle battery can be converted back to AC for export to the grid.

  3. What is the maximum voltage output specified for a CHAdeMO DC fast charger?

    Answer: 500 V DC

    Standard CHAdeMO chargers specify a maximum output of 500 V DC, though the newer CHAdeMO 3.0 (ChaoJi) extends this significantly.

  4. Which type of thermal management is most effective for protecting EVSE power electronics in high-ambient-temperature outdoor installations?

    Answer: Liquid cooling of internal power modules

    Liquid cooling of internal power modules provides the most effective thermal management for high-power EVSE in hot outdoor environments, enabling sustained output without derating.

  5. What does the term 'charging curve' refer to in the context of DC fast charging?

    Answer: The relationship between the vehicle's state of charge and the accepted charge power over time

    The charging curve describes how accepted power (and current) changes as the vehicle's battery state of charge increases during a fast-charge session.

  6. Which component in a networked EVSE is primarily responsible for secure user authentication and session authorization?

    Answer: The RFID reader or network gateway with backend OCPP authorization

    RFID readers combined with backend OCPP authorization allow the network to verify user credentials before enabling a charging session.

  7. What is the purpose of the pre-charge circuit in a DC fast charger before closing the main contactors?

    Answer: Slowly raise the DC bus voltage to match the vehicle battery voltage and prevent inrush current damage

    The pre-charge circuit ramps the DC bus voltage up to the vehicle battery voltage level through a current-limiting resistor before the main contactors close, preventing damaging inrush current.