Electric vehicle Tech 2

Which type of EV uses hydrogen as fuel to generate electricity?

• BEV

• FCEV

• PHEV

• HEV

In a Plug-in Hybrid Electric Vehicle (PHEV), the battery can be charged using:

• Only regenerative braking

• Only internal combustion engine

• An external power source

• None of the above

What is the main characteristic of a mild hybrid vehicle?

• Can run only on an electric motor

• Combines a small electric motor with an ICE

• Runs entirely on hydrogen fuel

• Has no internal combustion engine

Full hybrid vehicles:

• Cannot operate in electric-only mode

• Use the electric motor to assist the ICE only

• Can operate using only the electric motor, only the ICE, or a combination of both

• Do not have a battery system

In a series hybrid system:

• The electric motor drives the wheels, and the ICE is used to generate electricity.

• The ICE directly drives the wheels with no use of an electric motor.

• Both the ICE and the electric motor are used simultaneously to drive the wheels.

• Only regenerative braking charges the battery.

What distinguishes a plug-in hybrid from a traditional hybrid vehicle?

• Plug-in hybrids can operate only in electric mode for extended distances.

• Traditional hybrids do not have an internal combustion engine.

• Plug-in hybrids rely solely on regenerative braking to recharge the battery.

• Traditional hybrids have larger batteries than plug-in hybrids.

Which hybrid configuration allows both the internal combustion engine and the electric motor to operate independently or simultaneously?W

• Series hybrid

• Parallel hybriid

• Series - Parallel hybrid

What is the purpose of a DC-DC converter in an EV?

• Converts the battery’s DC voltage to AC for the motor.

• Steps down high voltage from the battery to power auxiliary systems.

• Charges the battery during regenerative braking.

• Manages the flow of coolant in the thermal system.

Why are permanent magnet synchronous motors (PMSMs) widely used in EVs?

• They are cheaper to manufacture than induction motors.

• They offer higher efficiency and torque density.

• They do not require inverters for operation.

• They are more efficient at low speeds only.

What is a key advantage of using liquid cooling in EV battery packs?

• Enhances battery life by maintaining a stable temperature.

• Eliminates the need for a thermal management system.

• Increases battery charging time.