untitled

Multiple Choice

When the engine is not running, the battery powers the electrical system.

• True

• False

Multiple Choice

"While discussing automotive charging systems, Technician A says the ignition switch is considered a component of the charging system. Technician B says the alternator belt is considered a component of the charging system. Who is right?

• Tech A

• Tech B

• Both

• Neither

Multiple Choice

The brush holder is made of an insulating material.

• True

• False

Multiple Choice

Alternator bearings are packed with grease.

• False

• True

Multiple Choice

Technician A says an alternator’s stator is a stationary set of windings. Technician B says an alternator’s stator is surrounded by the rotor. Who is right?

• Tech A

• Tech B

• Both

• Neither

Multiple Choice

Technician A says alternator slip rings are mounted on the stator shaft to feed current into the stator windings. Technician B says alternator brushes ride on the slip rings to make a sliding electrical connection. Who is right?

• Tech A

• Tech B

• Both

• Neither

Multiple Choice

Technician A says an automotive charging system’s voltage output is equal to battery voltage. Technician B says a charging system’s voltage output changes as the electric load changes. Who is right?

• Tech A

• Tech B

• Both

• Neither

Multiple Choice

A diode controls electricity by allowing it to flow in one direction only.

• True

• False

Multiple Choice

Technician A says an alternator capacitor helps prevent radio noise. Technician B says an alternator capacitor helps protect the rectifying diode from voltage spikes. Who is right?

• Tech A

• Tech B

• Both

• Neither

Multiple Choice

On hybrid vehicles, the alternator is replaced with a motor-generator.

• True

• False

Multiple Choice

A charge indicator light comes on when the charging system voltage is too low.

• False

• True

Multiple Choice

An ammeter measures the charging system voltage output.

• True

• False

Auto Electricity
and Electronics

Presentations for PowerPoint

Battery Technology

12
Chapter

Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website.

• Operates electrical systems during engine cranking and starting
• Supplies electric power for accessories
• Helps provide electricity when current demands exceed alternator
output limit
• Smoothes current through electrical systems
• Stores energy for extended periods

Battery Function

Multiple Choice

A battery can feed electricity into the rest of the electrical system when necessary.

• False

• True

Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website.

• Electrochemical device
• Stores and produces electric current and voltage
• Conventional battery: lead-acid battery

Automotive Battery Construction

Multiple Choice

Technician A says an automotive battery produces direct current. Technician B says an automotive battery is an electromechanical device. Who is right?

• Tech A

• Tech B

• Both

• Neither

Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website.

• Group of cells that generate electric charge
• Battery cell
• Electrodes

12-Volt Battery

Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website.

• Positive plates: lead peroxide (PbO2)
• Negative plates: sponge lead
• Electrolyte (battery acid)
• Separators

Battery Cell Construction

Multiple Choice

Positive plates are made of lead peroxide.

• False

• True

Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website.

• Calcium or antimony added to positive plates
• Increases performance
• Decreases gassing
• Plate strap connects battery plates
• Battery element

Battery Cell Construction (cont.)

Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website.

• Electrolyte must never come in contact with your skin or eyes.
Sulfuric acid is a very powerful corrosive substance.
• The sulfuric acid in the electrolyte can cause serious skin burns or
even permanent blindness.
• Hydrogen gas can collect at the top of batteries. If this gas is
exposed to a flame or spark, it can explode.

Warning

Multiple Choice

Battery electrolyte is made of sulfuric acid and hydrogen.

• True

• False

Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website.

Battery Posts and Terminals

Multiple Choice

The polarity of side terminal batteries is marked by + and – signs on the battery case.

• True

• False

Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website.

• Battery charge indicator
• Also called hydrometer
• Uses specific gravity
• Battery tray and retainer

Other Battery Parts

Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website.

• Connect terminals to vehicle electrical system
• Positive cable (red)
• Fastens to starter solenoid
• Negative cable (black)
• Connects to ground
• Body ground wire

Battery Cables

Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website.

Battery Junction Block

Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website.

• Battery converts chemical energy to electrical energy
Battery Discharge

Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website.

• Apply slightly higher voltage to positive terminal
• Electrons flow back through battery
• Restores chemicals

Charging a Discharged Battery

Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website.

Battery Cell Discharging

Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website.

Battery Cell Charging

Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website.

• Depends on number of cells
• Each cell = 2.1 volts (rounded to 2 volts)
• Most vehicle batteries have 6 cells, or 12 volts
• Diesels may have 2 batteries wired in parallel

Battery Voltage

Multiple Choice

Technician A says each cell in a 12-volt automotive battery produces 2.1 volts. Technician B says battery voltage depends on the number of cells.

• Tech A

• Tech B

• Both

• Neither

Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website.

Dual Batteries for Diesel Engine

Multiple Choice

A diesel engine may have two batteries wired in series.

• False

• True

Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website.

Battery Temperature and Efficiency

Multiple Choice

As battery temperature drops, battery power drops.

• True

• False

Multiple Choice

A battery has a harder time starting a cold engine because the oil is thicker than it is when the engine is hot.

• True

• False

Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website.

• Wet-charged battery
• Dry-charged battery
• Maintenance-free battery
• Gel battery
• Absorbed glass mat battery (AGM battery)

Types of Lead-Acid Batteries

Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website.

• Cold cranking amps (CCA)
• Watt rating
• Reserve capacity (RC)

Battery Ratings

Multiple Choice

Modern batteries need to have water added only about every six months.

• True

• False