EVITP EV Technology Fundamentals 3

Question 1

What is the maximum continuous current permitted for AC Level 2 charging under SAE J1772?

Accepted Answer

80 A

Answer

SAE J1772 allows AC Level 2 charging up to 80 A.

Question 2

Which component monitors individual cell voltages, temperatures, and state of charge in an EV traction battery?

Accepted Answer

Battery management system (BMS)

Answer

The BMS tracks cell conditions and protects the pack from overcharge, overdischarge, and overheating.

Question 3

During regenerative braking, what happens to the vehicle's kinetic energy?

Accepted Answer

It is converted to electrical energy and stored in the battery

Answer

The traction motor acts as a generator, converting kinetic energy into electricity that recharges the battery.

Question 4

An EV battery is rated at 75 kWh. What does this figure describe?

Accepted Answer

Energy storage capacity

Answer

Kilowatt-hours measure energy, so 75 kWh is the battery's storage capacity.

Question 5

During a DC fast-charging session, where does the AC-to-DC conversion take place?

Accepted Answer

Inside the off-board DC charging equipment

Answer

DC fast chargers contain their own rectifiers and deliver DC directly to the battery, bypassing the onboard charger.

(EVITP) Electric Vehicle Infrastructure Program Practice Test