1. Automotive Service Modern Auto Tech Study Guide Chapter 28 & 29
Pages
Batteries
46 Points

2. Automotive Service
A ______________ is an electrochemical device that produces & stores
__________ ____________ (DC) electricity. Charging system output must also be DC in order to recharge a battery
Battery
Alternator
Capacitor
Direct Current
Alternating Current
Eddy Current

3. Automotive Service
Repeated, heavy ____________________ (current flowing out) and
____________________ (current flowing in) of a battery is called “cycling” the charge. If this process happens too often, the battery will be ruined.
Discharging, Recharging

4. Automotive Service
Batteries operate the electrical systems during _____________ & (starting)
and whenever the engine is off.
Cranking
Jumping
Stomping

5. Automotive Service
As the engine runs, the ______________ system supplies vehicle electrical
needs & recharges the battery.
Starting
Ignition
Charging

6. Automotive Service
Battery negative plates are made of porous ________ and positive plates are
made of lead _____________ alloyed with calcium or antimony to increase performance & decrease gassing (acid fume formation).
Lead, Peroxide
Sponge, Oxide
Plastic, Sulfate

7. Automotive Service
Within the polypropylene battery case, ____________________ keep the
positive & negative plates from touching each other.
This would internally “short circuit” the battery & ruin it.
Capacitors
Separators
Mufflers

8. Automotive Service
The ____________ gas around a battery is explosive and the
battery electrolyte is acidic & corrosive!
Oxygen
Nitrogen
Hydrogen

9. Automotive Service
8. ____________________ is the mixture of acid & water in a lead-acid battery.
Electrolyte
Gatorade
Distilled Water

10. Automotive Service 36% H2SO4 64% H2O
9. Battery electrolyte is made up of ____% _____________ ________ (H2SO4)
& ____% _________ (H2O).
36% H2SO4
64% H2O

11. Automotive Service

12. Automotive Service
Vehicle battery cables connect to either the ______ posts or the
______ terminals on a battery.
Top, Side

13. Automotive Service Black = Negative Red = Positive
The battery cable color code is:
____________ = negative
________ = positive.
Black = Negative
Red = Positive

14. Automotive Service
Internally, batteries have ____ cells (each with ≈ 2 volts)
connected in series (+ to -) to produce ____ volts.
3, 12
6, 12
12, 12

15. Automotive Service
For heavy duty use, like in snow plow trucks, 2 batteries connected in
________________ (+ to +) will provide more current output but still keep the system operating with 12 volts.
Series
Parallel
Series-Parallel

16. Automotive Service
Batteries last longer if they are properly held down, to prevent
__________________ and if they are kept insulated from
excess, under the hood __________.
Movement, Heat

17. Automotive Service
15. A _________________ - free battery does not use removable filler caps.
Maintenance
Lead
Sodium

18. Automotive Service
16. A ____ battery is a lead-acid battery with electrolyte in a paste like consistency.
Gel
Jello
Hello

19. Automotive Service
17. An _____________ _______ _____ battery (AGM) contains fiber matting that holds the liquid electrolyte.
Absorbed Glass Mat
Absorbed Gas Mask
Ambient Gel Manager

20. Automotive Service
18. The SAE & BCI have established the ______ ___________ _____
(CCA) rating for batteries.
CCA is the amount of current (amps) a battery can deliver for
30 seconds at 0ºF & remain above 7.2 volts.
Cold Cranking Amp
Hot Cranking Amp
Boiling Cranking Amp

21. Automotive Service
19. The _____________ _______________ rating indicates the time it takes to
drop voltage below 10.2 volts from a full charge at a discharge rate of 25
amps and an ambient temperature of 80 degrees.
Reverse Capacity
Revere Capacity
Reserve Capacity

22. Automotive Service
20. A ________ battery won’t produce as much current as warm one.
At 0ºF a battery has only ___% power Fº is optimal for a battery
Warm, 25%
Cold, 40%

23. Automotive Service
21. A ________________________ load is any current draw present
when all electrical devices are shut off…”key – off”.
Parasitic
Static
Dynamic
Amps

24. Automotive Service ~~~
22. If a battery case is dirty, clean it with _________________ ________
and water to neutralize the acid.

25. Automotive Service
23. When using a ________ meter to determine OCV always connect the
red lead to the ______________ battery post or terminal and connect the
black lead to ________________ battery post or terminal .
Volt, Positive, Negative
Ohm, Negative, Positive
Watt, Positive, Negative

26. Automotive Service
24. “Tech Tip” When disconnecting a battery for service,
use a ______________ saver connected to the interior power plug
(cigarette lighter) to keep power going to the computer’s
Random Access Memory.
Sight
Memory
Time

27. Automotive Service
Batteries that are not maintenance free should have _______________ water
added if electrolyte is low.
Q? What is distilled water?
Simple Answer: Distillation is a process of water evaporating, condensation and precipitating. In nature, this process is known as the hydrologic cycle. Water is heated to its boiling point, and the resulting steam is captured to form pure distilled water.

28. Automotive Service
A _____________________ is a tool used to measure specific gravity,
which is the weight or density of the electrolyte as compared to the weight
or density of water.
Manometer
Thermometer
Hydrometer

29. Automotive Service
Fully charged batteries should have hydrometer readings of at least
________ times heavier than water
1.265 to 1.300
1.100 to 1.200
0.900 to 1.000

30. Automotive Service
Specific ______________ should not vary more than 25 to 50 “points”
between cells. (.025 to .050)
Gravity
Pressure
Vacuum

31. Automotive Service
Specific Gravity of Water is very steady at 1.000

32. Automotive Service
A battery _________ is a machine used to recharge a low or dead battery.
Never attempt to recharge or jump start a totally discharged, frozen battery!
Jumper
Charger
Packer

33. Automotive Service
It‘s possible to ________ _________ a vehicle w/dead battery by
connecting it to a vehicle w/good one.
Push Start
Bump Start
Jump Start

34. Automotive Service
Jumper cables or packs get connected from the _______________ of the
good battery to the positive of the dead battery & from the ________________ of the good battery to the negative of the dead battery.

35. Automotive Service
32. When disconnecting a battery for service, ALWAYS remove the
_______________ cable first.
Remove Negative Cable First!

36. Automotive Service
33. When disconnecting a battery for service, ALWAYS replace the
_______________ cable last.
Replace Negative Cable Last!
Ground Symbol

37. Automotive Service
34. When servicing a battery, ALWAYS use ______________ tools to
prevent shorts.
Stainless Steel
Insulated
Quality

38. Automotive Service During a Quick (3 Minute) Charge Test,
if the voltage goes above ______ volts, the battery is junk.
6 Volts
12 Volts
15 Volts

39. Automotive Service
Voltage Drop Test of Cable-to-Post Connection – Should be Zero VD

40. Automotive Service Positive To Negative To
Jump Starting Cable Connection Sequence