Practice tests Pricing Log in Start trial
Home › Practice tests › XEV
ASE Advanced & EV

XEV High-Voltage EV Safety — practice test

Studying for XEV (High-Voltage EV Safety)? Overhaul Prep has 162 verified XEV questions written to the current task list — in the same formats the real exam uses (direct, Technician A/B, EXCEPT and most-likely-cause). Every answer comes with a written explanation, so you learn why instead of memorising a letter.

162XEV questions
100%with explanations
9,711questions in total
Try 10 free ASE Advanced & EV questions →

Sample XEV questions

Straight from the bank — answers highlighted, with the explanation underneath.

High-voltage cables and conduit in an xEV are identified by what color per common industry convention?

  1. Orange
  2. Yellow
  3. Blue
  4. Red
WhyOrange is the accepted identifier for high-voltage (>60 V DC) cabling so technicians can immediately recognize energized conductors.

Two technicians discuss the HVIL. Technician A says the HVIL is a low-voltage loop routed through HV connectors and covers. Technician B says breaking the HVIL causes the BMS to open the main contactors. Who is correct?

  1. Technician A only
  2. Technician B only
  3. Both Technicians A and B
  4. Neither Technician
WhyBoth are correct: the HVIL is a low-voltage series loop, and interrupting it signals the BMS to open the contactors and de-energize the HV bus.

A technician measures the HV bus and finds full pack voltage present even though the vehicle is powered off and shut down. The MOST likely cause is:

  1. A welded (stuck-closed) contactor
  2. A weak 12 V battery
  3. A failed DC-DC converter
  4. Normal capacitor charge that bleeds in seconds
WhyIf HV persists at the bus with the system commanded off, a contactor is likely welded closed, a serious hazard that confirms why zero-energy verification is mandatory.

Ready to pass XEV?

Get all 162 XEV questions plus timed full-length mock exams, a high-yield “must-know” filter, and readiness tracking that tells you when you're actually ready.

Start your 24-hour free trial
← See all 59 practice tests