Exam 36: Electric Vehicles

The Tesla Roadster uses Nickel-metal hydride batteries .

Conductive charging is done with a connector called the ODU that looks like a fuel nozzle.

While discussing controllers in BEVs: Technician A says the controller may reverse the current flow to the motor when reverse gear is selected. Technician B says modern controllers adjust motor speed through pulse width modulation. Who is correct?

Technician A says that a fuel cell produces electricity through an electrochemical reaction that combines hydrogen and oxygen to form water. Technician B says that in a fuel cell, catalysts are used to ignite the hydrogen, causing a release of electrical energy. Who is correct?

A  PEM fuel cell needs to operate at very high temperatures.

Technician A says that all FCEVs have regenerative braking. Technician B says that all FCEVs have an auxiliary 12-volt battery. Who is correct?

For most EVs the motor increases torque so there in no need for a _____________. ​

While discussing diagnosis of the control system of a BEV: Technician A begins by checking the voltage of the auxiliary battery. Technician B inspects all fuses, fusible links, wiring harness, connectors, and ground in the low-voltage circuit. Who is correct?

While discussing hydrogen: Technician A says that a hydrogen atom has one proton and two electrons. Technician B says that hydrogen is produced in a fuel cell when water is broken down into its basic elements. Who is correct?

What is the major disadvantage of current all electric vehicles?

Hydrogen-fueled vehicles are being discussed. Technician A says hydrogen [H₂] can be made from natural gas. Technician B says hydrogen can be made from water. Who is correct?

A fuel cell converts fuel into electricity.

Technician A says with conductive charging there is no metal-to-metal contact between the charge paddle and the charge port of the vehicle. Technician B says inductive charging takes place by making a connection between the charging connector and the charge port. Who is correct?

Pedestrians cannot hear most approaching BEVs.

Electrolysis is the process in which hydrogen and oxygen are combined to form water.

All fuel cell vehicles have regenerative braking and 12-volt auxiliary systems.

Which of the statements about hydrogen is false?

Technician A says some BEVs use liquid to heat the passenger compartment. Technician B says some BEVs use an electric resistance heater with a fan to heat the passenger compartment. Who is correct?

A fuel cell produces electricity through electrolysis.

Why are carbon dioxide emissions a concern?