Question 1

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 .

D

Accepted Answer

An ultra capacitor is a device that stores energy as electrostatic charge and is used in a hybrid system as the primary device in the power supply during hill climbing, acceleration, and the recovery of braking energy. A battery pack and a motor generator are also used in hybrid systems, but they serve different purposes and are not the primary device for storing energy during these specific situations. A DC inverter is used to convert the DC power from the battery or capacitor into the AC power needed to drive the motor.

Question 2

To test the integrity of the insulating gloves:&#10;A)Fill the gloves with water to see if there is a leak.&#10;B)Fill the gloves with air and submerge in water to see if air bubbles arise from any leaks.&#10;C)Shine a flashlight into the glove and see if light escapes.&#10;D) None of these choices.

Accepted Answer

D

Question 3

The dual-voltage system can use:&#10;A) A dual-generator system.&#10;B)A dual-stator, dual-voltage system .&#10;C) A DC/DC converter.&#10;D) All of these choices.

Accepted Answer

A dual-voltage system can utilize any of the mentioned options: a dual-generator system, a dual-stator, dual-voltage system, or a DC/DC converter, depending on the specific requirements and design of the system.

Question 4

Electric vehicles power the motor by:&#10;A)A generator.&#10;B)A battery pack.&#10;C) An engine.&#10;D) None of these choices.

Accepted Answer

Electric vehicles are powered by a battery pack, which stores electrical energy that is used to power an electric motor. The motor then turns the wheels of the vehicle, providing propulsion without producing any emissions. Generators are typically used in hybrid vehicles to charge the battery, and engines are used in gasoline or diesel-powered vehicles.

Question 5

The high-voltage service plug:&#10;A)Disconnects the inverter/converter from the motor generators.&#10;B)Disconnects the auxiliary battery from the HV battery.&#10;C) Disconnects the HV battery from the system.&#10;D) Provides a connection for the battery charger.

Accepted Answer

The high-voltage service plug disconnects the high-voltage (HV) battery from the system, allowing for safe maintenance and repair work to be done without risking electric shock. It does not disconnect the inverter/converter from the motor generators, nor does it disconnect the auxiliary battery from the HV battery. It is not used for providing a connection for the battery charger.

Question 6

The main advantage of the ISG system is:&#10;A) Can be used to provide accessory power if the battery fails.&#10;B)Allows for automatic stop/start functions.&#10;C) Increase the life of the brake linings.&#10;D) All of these choices.

Accepted Answer

The answer of The main advantage of the ISG system...

Question 7

All of the following are benefits of the 42-volt electrical system EXCEPT:&#10;A) Allows for electrifying most of the mechanical and hydraulic systems.&#10;B) Light bulbs last longer.&#10;C) Reduction in size of electrical components and wires.&#10;D) Increased efficiency of the charging system.

Accepted Answer

The benefits of the 42-volt electrical system include allowing for electrifying most of the mechanical and hydraulic systems, reduction in size of electrical components and wires, and increased efficiency of the charging system. However, there is no direct correlation between the voltage of the electrical system and the lifespan of light bulbs, so option B is not a benefit of the 42-volt electrical system.

Question 8

All of the following statements concerning hybrid high-voltage system safety is true EXCEPT:&#10;A)Disconnect the motor generators prior to turning the ignition off.&#10;B)Disconnect the negative (-) terminal of the auxiliary battery before removing the service plug.&#10;C)Do not attempt to test or service the system for five minutes after the high-voltage service plug is removed.&#10;D)Turn the power switch to the OFF position prior to performing a resistance check.

Accepted Answer

Disconnecting the motor generators prior to turning the ignition off is not a standard safety procedure for hybrid high-voltage systems. The ignition should be turned off first to ensure safety.

Question 9

The splitting of water into hydrogen and oxygen is an example of:&#10;A) Steam reforming.&#10;B)Hydrocarbon reforming.&#10;C) Partial oxidation reforming.&#10;D) Electrolysis.

Accepted Answer

The splitting of water into hydrogen and oxygen is a chemical process called electrolysis, in which an electric current is passed through the water to separate the hydrogen and oxygen atoms. Steam reforming, hydrocarbon reforming, and partial oxidation reforming are different methods for producing hydrogen fuel from fossil fuels, and do not involve the splitting of water.

Question 10

When working on the high-voltage system, which of the following should be done?&#10;A) Always place the high-voltage service plug where someone will not accidentally reinstall it.&#10;B) Before servicing, use a voltmeter set on 400 VDC to determine if the high-voltage system voltage is at 0 volts.&#10;C) Test the integrity of the insulating gloves prior to use.&#10;D) All of these choices.

Accepted Answer

All of the given choices should be done when working on the high-voltage system. A) Placing the high-voltage service plug where someone will not accidentally reinstall it will prevent electrical accidents. B) Testing the high-voltage system voltage using a voltmeter before servicing will ensure that the system is de-energized, preventing electrical shocks. C) Testing the insulating gloves prior to use will ensure that the worker is properly insulated while working on the high-voltage system.

Deck 17: Vehicles With Alternative Power Sources Hybrid and High-Voltage System Service