Automotive Systems Technology - Chapter 36 - Electric Vehicles

Technician A says that all FCEVs have regenerative braking. Technician B says that all FCEVs have an auxiliary 12-volt battery. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

d. Neither A nor B

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? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

d. Neither A nor B

The component that changes the molecular structure of hydrocarbons into hydrogen-rich gas is called a ___. a. pressure container b. fuel cell c. fuel injector d. reformer

d. reformer

What makes up the propulsion system in a BEV?

high voltage battery, electric motor, controllers

What basic factors affect the required time to recharge the battery pack in a BEV?

the existing state of charge, type of charger used

True or False? All fuel cell vehicles have regenerative braking and 12-volt auxiliary systems.

False

Why is water control so important to the effectiveness of a PEM fuel cell?

Cold temperature water can freeze making the fuel cell very difficult to get started

True or False? A PEM fuel cell needs to operate at very high temperatures.

False

Why are carbon dioxide emissions a concern?

The main greenhouse gas is carbon dioxide. They are emitted as expected and by burning of fossil fuels. They stay in environment for extended periods of time.

Which of the following statements about fuel cells is NOT true? a. A single fuel cell produces very low voltage, normally less than one volt. b. A fuel cell produces electricity through an electrochemical reaction that combines hydrogen and oxygen to form water. c. A fuel cell is composed of two electrodes coated with a catalyst and separated from each other by an electrolyte and from the case by separators. d. In a fuel cell, catalysts are used to ignite the hydrogen; this causes a release of electrons or electrical energy.

d. In a fuel cell, catalysts are used to ignite the hydrogen; this causes a release of electrons or electrical energy.

What is the basic fuel for a fuel cell? a. Hydrogen b. Methanol c. Electricity d. Gasoline

a. Hydrogen

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 electrons or electrical energy. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

a. Technician A

Technician A says that gasoline can be used as a source of hydrogen for a fuel cell. Technician B says that carbon dioxide can be used as a source of hydrogen for a fuel cell. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

a. Technician A

Which of the statements about hydrogen is true? a. A hydrogen atom is one proton and two electrons. b. Hydrogen is one of the heaviest elements known and is full of energy. c. Fossil fuels are combinations of carbon and hydrogen. d. Hydrogen is produced in a fuel cell when water is broken down into its basic elements.

c.

Technician A says power is the ability to do work. Technician B says energy is the rate at which work is done. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

c. Both A and B

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. Technician A b. Technician B c. Both A and B d. Neither A nor B

c. Both A and B

While diagnosing a decreased driving concern on a BEV: Technician A begins by checking the tire pressure and tire type. Technician B inspects under-vehicle covers and shields. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

c. Both A and B

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? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

c. Both A and B

List 5 things a driver of a BEV can do to extend the driving range of the vehicle.

Avoid high-speed driving. Maintain a moderate speed on highways. Avoid driving up inclines. Avoid frequent speed increases or decreases. Attempt to drive at a steady pace. Avoid unnecessary stopping and braking. Avoid full-throttle acceleration, accelerate slowly and smoothly.

There are two basic ways a BEV is connected to an external source of electricity for charging: conductive and inductive. What is the difference between the two?

Conductive is metal to metal contact, Inductive is wireless and a paddle system could be used

Explain what the ratings of kilowatts and kilowatt-hours mean.

One kilowatt (kW) is the international unit to measure power (not only electrical); a kilowatt is 1,000 watts. The amount of energy available is expressed in kilowatt hours (kWh). Kilowatt hours express what can be accomplished by 1 kilowatt acting for 1 hour.

Which of the following statements about hydrogen is not true? a. Hydrogen displaces air, so any release in an enclosed space could cause asphyxiation. b. Hydrogen must be stored as a compressed gas c. Hydrogen is nontoxic. d. Hydrogen is highly flammable and there is risk for an explosion.

b.

Which of the following CANNOT be used as a source for the production of hydrogen? a. Gasoline b. Methanol c. Carbon dioxide d. Natural gas

b. Methanol

While discussing charger connections: Technician A says nearly all BEVs currently sold in North America have an AVCON connector. Technician B says the connector currently used for DC fast charging on the Nissan Leaf and Mitsubishi i vehicles is based on the CHAdeMO standard. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

b. Technician B

While discussing inductive charging: Technician A says most current BEVs use this system because it is safe. Technician B says this method requires that a weatherproof paddle be inserted into the vehicle's charge port. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B

b. Technician B