Deck 16: Vehicles With Alternative Power Sourceshybrid and High-Voltage System Service

Question 1

Hybrid electric vehicles may be a parallel hybrid or a series hybrid design.

Answer 1

True

Question 2

The main advantage of the ISG system is:

A) Can be used to provide accessory power if the battery fails.
B) Allows for automatic stop/start functions.
C) Increase the life of the brake linings.
D) All of the above.

Answer 2

B

Question 3

In a hybrid vehicle the motor/generator recovers the heat energy used to brake by converting rotational energy into kinetic energy through a system of electric motors and generators.

Answer 3

False

Question 4

In a parallel hybrid vehicle, there is a direct mechanical connection between the engine and the wheels.

Question 5

In most hybrid vehicles, the addition of the internal combustion engine meant the vehicle could not be classified as a(n) ____ vehicle.

A) zero emission
B) low-emission
C) ultra low-emission
D) electric

Question 6

A reformer on board a fuel cell powered vehicle is used to produce hydrogen from a fuel sources such as methanol.

Question 7

A hybrid vehicle may also incorporate an engine that uses lean burn technology to maximize efficiency.

Question 8

The ISG is a singe phase AC motor.

Question 9

Technician A says the compressed hydrogen system requires a reformer to cool the fuel cell. Technician B says a fuel cell produces electrical energy by breaking down hydrogen atoms into electrons and protons. Who is correct?

A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 10

The primary advantage of an electric vehicle is a drastic reduction in ____ and emission levels.

A) fuel inefficiency
B) noise
C) traffic
D) speeding

Question 11

____ braking means that the braking energy is turned back into electricity instead of heat.

A) Back
B) Energetic
C) Thermal
D) Regenerative

Question 12

Regenerative braking is a method of capturing the vehicles thermal energy in the batteries while it slows down.

Question 13

Electric vehicles power the motor by:

A) A generator.
B) A battery pack.
C) An engine.
D) None of these choices.

Question 14

In a hybrid system, the __________ __________ is a device that stores energy as electrostatic charge and is the primary device in the power supply during hill climbing, acceleration, and the recovery of braking energy.

A) Battery pack.
B) Motor Generator.
C) DC Inverter.
D) Ultra capacitor.

Question 15

In a PEM fuel cell, which side does the oxygen enter from?

A) Gate
B) Anode
C) Drain
D) Cathode

Question 16

In a full hybrid HEV, which component is responsible for recharging the 12-volt battery from the 300-volt direct current system?

A) The battery control module
B) The belt driven generator
C) The DC/DC converter
D) The LV control module

Question 17

In the ISG system the stator is attached to the engine block and coils that are formed by laser-welding copper bars.

Question 18

The ultra capacitor is a device that stores energy as electrostatic charge.

Question 19

The high-voltage service plug:

A) Disconnects the inverter/converter from the motor generators.
B) Disconnects the auxiliary battery from the HV battery.
C) Disconnects the HV battery from the system.
D) Provides a connection for the battery charger.

Question 20

The protein exchange membrane is the most common fuel cell design.

Question 21

Some fuel cell systems may require the use of an on-board reformer to extract ____ from liquid fuels such as gasoline, methanol, or ethanol.

A) hydrocarbon
B) oxygen
C) electrical energy
D) hydrogen

Question 22

The hybrid electric vehicle (HEV) system can use ____ to recover energy that normally would be lost to heat and use it to supplement the power of the engine.

A) recycling
B) special sensors
C) regenerative braking
D) high-voltage

Question 23

Lean burn technology uses high air-fuel ratios to increase ____.

A) acceleration
B) battery capacity
C) fuel efficiency
D) fuel intake

Question 24

Fuel cells electrochemically combine ____ with hydrogen to produce electricity.

A) oxygen from the air
B) protons
C) graphite paper
D) a polymer membrane

Question 25

The ____ controls the current flow between MG1, MG2, and the HV battery.

A) inverter
B) rectifier
C) converter
D) battery ECU

Question 26

Technician A says if there is a leak in the high-voltage system insulation the system will enter fail-safe control and set DTCs. Technician B says fail-safe will occur if the battery ECU determines the insulation resistance of the power cable to be 100 kΩ, or less. Who is correct?

A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 27

Technician A says the hybrid vehicle is classified as a ZEV. Technician B says the fuel the direct methanol air fuel cell (DMAFC) provides a zero-emissions system. Who is correct?

A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 28

In the dual-stator, dual-voltage system, dual voltage is produced from a single ____ that has two output voltages.

A) generator
B) solenoid
C) stator
D) alternator

Question 29

____ data is useful for determining how the vehicle was operating at the time and for locating any input or output values that are out of range.

A) Battery state of charge
B) Freeze frame
C) Scan tool
D) HV ECU

Question 30

A ____ monitors the condition of the HV battery assembly.

A) MG1 control
B) MG2 control
C) SOC monitor
D) battery ECU

Question 31

The battery ECU attempts to keep the SOS of the HV battery at:

A) 30%
B) 40%
C) 50%
D) 60%

Question 32

After the high-voltage service plug is removed, a minimum of ____ must pass before beginning service on the system.

A) 5 minutes
B) 30 minutes
C) one hour
D) two hours

Question 33

The ____ controls the operation of the system main relay (SMR) to connect and disconnect the power source of the high-voltage system.

A) battery ECU
B) HV ECU
C) inverter
D) converter

Question 34

The ____ is a DC/DC transformer.

A) inverter
B) auxiliary battery
C) converter
D) HV ECU

Question 35

Technician A says a disadvantage of electric motors is their low torque output. Technician B says the ultra capacitor is used as a generator to charge the HV battery during heavy load conditions. Who is correct?

A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 36

Technician A says the best method for recharging the HV battery is to allow the HV system to replenish the battery. Technician B says if the DC/DC converter malfunctions, the auxiliary battery voltage will drop until it is no longer possible to drive the vehicle.

A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 37

Technician A says SMR1 and SMR3 are turned on to provide the needed current for the motor generator to start the engine. Technician B says SMR1 is turned on and SMR2 is turned off to allow free flow of current in the circuit. Who is correct?

A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 38

If the combustion engine is capable of turning the drive wheels as well as the generator, then the vehicle is referred to as a(n) ____.

A) series hybrid
B) parallel hybrid
C) ultra capacitor
D) conventional vehicle

Question 39

The high-voltage electronic control unit (HV ECU) controls the two motor generators (MG1 and MG2) and the engine based on ____ demand.

A) battery
B) torque
C) modular
D) charge

Question 40

The fuel cell produces and supplies electric power to the electric motor instead of the ____.

A) drive wheels
B) batteries
C) generator
D) combustion engine

Question 41

Describe the basic operating principle of a fuel cell.

Question 42

A fuel cell powered vehicle is basically what type of vehicle?

Question 43

What system on a hybrid vehicle recovers the energy used to brake by converting rotational energy into electrical energy?

Question 44

Using the ISG to start the engine is being discussed. Technician A says current flows through the stator windings and generates magnetic fields in the rotor. Technician B says the stator is connected to the crankshaft. Who is correct?

A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 45

In which hybrid vehicle design is there no mechanical connection between the engine and the wheels?

Question 46

What type of motor design does an integrated starter generator (ISG) system use?

Question 47

Technician A say the inverter converts the voltage from 270 VDC to 14 VDC to recharge the auxiliary battery and to power 12-volt electrical components. Technician B says the convertor converts HV battery DC voltage into three-phase alternating current  (AC) for MG1 and MG2. Who is correct?

A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 48

What is the component called on board a fuel cell powered vehicle that is used to produce hydrogen from a fuel sources such as methanol?

Question 49

What is one of the fundamental problems facing the fuels used for fuel cell technology before mass production can begin?

Question 50

What are some of the advantages that can be derived from a 42-volt electrical system?

Question 51

What is the most common type of fuel cell design?

Question 52

The dual-voltage 42-volt system is being discussed. Technician A says the system can use a dual-generator arrangement. Technician B says the system can use a dual-stator,  dual-voltage generator. Who is correct?

A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 53

The ISG can use a belt alternator starter (BAS). Technician B says the ISG is only capable of developing DC voltage. Who is correct?

A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 54

Technician A says a mild parallel hybrid provides for regenerative braking, instant engine start-up, and a boost to the combustion engine. Technician B says a full parallel hybrid vehicle is capable of propelling the vehicle with only the electric motor. Who is correct?

A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 55

What is one of the newest technologies to emerge from the research and development of the 42-volt system?

Question 56

In which hybrid vehicle design is there a direct mechanical connection between the engine and the wheels?

Question 57

Technician A says the ISG is a three-phase AC motor. Technicians B says the ISG can convert kinetic energy to storable electrical energy. Who is correct?

A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 58

Explain the basic operating principles of regenerative braking.

Question 59

What technology combines oxygen from the air with hydrogen to produce electricity?

Question 60

What type of system uses two generators, one that operates at 42-volts while the other operates at 14-volts?

Question 61

Describe the purpose and the different modes of operation of the system main relays.