AARC EV & Hybrid Vehicle Processing 4

Question 1

Which type of fire suppression system is recommended by NFPA 855 for indoor EV battery storage areas?

Accepted Answer

Extended application sprinkler systems with adequate water supply

Answer

NFPA 855 recommends water-based extended application sprinklers because cooling is the only effective method to suppress lithium battery thermal runaway.

Question 2

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?

Accepted Answer

Unplug the EVSE from the wall outlet before touching the vehicle

Answer

Disconnecting the EVSE from the power source first de-energizes the cord and eliminates shock hazard before handling the vehicle inlet.

Question 3

What information must appear on the label of a used EV battery pack shipped as universal waste?

Accepted Answer

'Universal Waste — Battery' and the accumulation start date

Answer

EPA universal waste rules require the label 'Universal Waste — Battery' and the date accumulation began to track the 1-year storage limit.

Question 4

Why should an EV or hybrid battery pack never be stored in a fully discharged (0% SOC) state for extended periods?

Accepted Answer

Deep discharge causes lithium plating and irreversible capacity loss

Answer

Extended storage at near-zero SOC causes lithium plating on anodes and electrolyte degradation, permanently reducing battery capacity.

Question 5

Which component of a hybrid vehicle's regenerative braking system is most likely to retain lethal voltage after the ignition is off?

Accepted Answer

The DC-DC converter output capacitors

Answer

DC-DC converter capacitors can hold hundreds of volts for several minutes after shutdown, presenting a lethal shock hazard.

(AARC) Accredited Automotive Recycler Certification Practice Test

(AARC) Accredited Automotive Recycler Certification Practice Test

AARC EV & Hybrid Vehicle Processing 4