EV & Hybrid Vehicle Processing Flashcards
7 cards from real AARC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 EV & Hybrid Vehicle Processing flashcards as text
Which type of fire suppression system is recommended by NFPA 855 for indoor EV battery storage areas?
Answer: Extended application sprinkler systems with adequate water supply
NFPA 855 recommends water-based extended application sprinklers because cooling is the only effective method to suppress lithium battery thermal runaway.
A plug-in hybrid electric vehicle (PHEV) arrives at the recycling yard still plugged into a Level 2 EVSE charge cord. What is the first action?
Answer: Unplug the EVSE from the wall outlet before touching the vehicle
Disconnecting the EVSE from the power source first de-energizes the cord and eliminates shock hazard before handling the vehicle inlet.
What information must appear on the label of a used EV battery pack shipped as universal waste?
Answer: 'Universal Waste — Battery' and the accumulation start date
EPA universal waste rules require the label 'Universal Waste — Battery' and the date accumulation began to track the 1-year storage limit.
Why should an EV or hybrid battery pack never be stored in a fully discharged (0% SOC) state for extended periods?
Answer: Deep discharge causes lithium plating and irreversible capacity loss
Extended storage at near-zero SOC causes lithium plating on anodes and electrolyte degradation, permanently reducing battery capacity.
Which component of a hybrid vehicle's regenerative braking system is most likely to retain lethal voltage after the ignition is off?
Answer: The DC-DC converter output capacitors
DC-DC converter capacitors can hold hundreds of volts for several minutes after shutdown, presenting a lethal shock hazard.
An AARC recycler purchases a fleet of retired electric delivery vans. Before auction or dismantling, what document should be requested from the fleet operator?
Answer: Battery history report including charge cycles and thermal events
Battery history data reveals thermal events, deep discharges, and total cycle count, which are critical for assessing resale value and safety risk.
What does 'state of charge' (SOC) refer to in an EV battery context?
Answer: The current available energy as a percentage of total capacity
SOC is analogous to a fuel gauge — it represents remaining energy as a percentage of the battery's full rated capacity.