WorksheetsBattery Construction and Components
Total questions: 20
Worksheet time: 10mins
Using the diagram, which component primarily prevents short circuits by keeping positive and negative plates separated while allowing ions to pass?
Vent plug on the top cover
Terminal post on the battery cover
Separator material between adjacent plates
Cell connector linking neighboring cells
A vehicle battery is rated 12 volts. Based on typical lead‑acid cell voltage, how many cells must be connected in series to achieve this rating?
Three cells producing about 4.0 volts
Two cells producing about 6.0 volts
Four cells producing about 3.0 volts
Six cells producing about 2.1 volts
According to the component list, which materials make up the positive and negative plates in a lead‑acid battery?
Graphite and lithium cobalt oxide
Nickel hydroxide and cadmium
Copper oxide and metallic zinc
Lead dioxide and sponge lead
When charging, gases form inside the battery. Which part shown in the diagram allows them to escape safely?
Vent plugs on the cover
Cell partitions inside case
Grids supporting active material
Electrolyte at the bottom
During charging in a lead-acid battery, what change occurs at the positive plates?
Lead sulfate becomes lead dioxide
Lead dioxide becomes lead sulfate
Lead sulfate remains unchanged
Sponge lead becomes lead sulfate
A vehicle’s alternator primarily performs which function while the engine runs?
Increases sulfuric acid concentration
Stores electrical energy chemically
Regulates battery terminal voltage
Converts mechanical energy to electrical
What is the role of the voltage regulator in a typical automotive charging system?
Maintains proper charging voltage
Controls alternator belt tension
Converts AC to mechanical energy
Raises electrolyte acid concentration
Which external charger type is best suited for safe maintenance over long periods?
Conventional constant voltage
Alternator-based charging
Fast high amperage chargers
Smart or multi-stage chargers
Which hazard is most associated with charging lead-acid batteries and requires ventilation to prevent accidents?
Electrical shock from plastic enclosures
Corrosive liquid formation during discharge
Explosive hydrogen and oxygen gas buildup
Toxic lead dust from sealed casings
A technician must remove battery terminals. Which sequence reduces the risk of short circuits?
Disconnect negative first, reconnect positive last
Disconnect negative first, reconnect negative last
Disconnect positive first, reconnect positive last
Disconnect positive first, reconnect negative last
Which PPE combination best protects against sulfuric acid splashes during battery service?
Chemical-resistant gloves and face shield
Leather gloves and ventilated goggles
Work gloves and cloth apron
Cotton gloves and safety glasses only
While lifting a 50-pound battery, which technique minimizes strain injuries?
Lift with legs while keeping back straight
Pull with arms while bending forward
Twist at the waist while lifting quickly
Arch the back to cradle the battery
A small sulfuric acid spill occurs on the bench. What is the correct first action to make the area safe?
Heat gently to evaporate liquid
Dilute with large amounts of water
Cover with absorbent sawdust
Neutralize with baking soda solution
During testing, why should metal tools be insulated near a battery?
To increase measurement accuracy
To reduce hydrogen gas production rate
To avoid creating unintentional short circuits
To prevent tool corrosion from humidity
Which fire extinguisher type is appropriate for electrical fires around battery systems?
Class C dry powder or CO2 extinguisher
Class D metal fire extinguisher
Class B foam-based extinguisher
Class A water-based extinguisher
Which practice helps reduce environmental contamination from lead-acid batteries?
Dispose in regular trash collection
Recycle through approved programs
Rinse cases in a nearby stream
Leave old units outdoors to vent
A 12‑volt lead‑acid battery reads 12.2V at rest after charging. Which action best applies voltage testing thresholds to judge its state of charge?
Assume it is defective and replace immediately
Interpret it partially charged and recharge soon
Consider it fully charged and ready to use
Ignore the reading and test only under load
You need to check electrolyte specific gravity in a non‑sealed battery. Which diagnostic tool should you select?
Digital multimeter for voltage measurements
Infrared thermometer for surface heat
Hydrometer for electrolyte assessment
Battery load tester for capacity
During long‑term storage of a vehicle battery, which combination of steps best maintains health?
Cold outdoor storage, keep terminals unclean
Sunny shelf storage, fast charge weekly
Cool dry storage, disconnect negative terminal
Store warm and humid, leave all terminals connected
A battery fails to hold charge despite reading 12.6V after charging. Which test applies a skill to evaluate capacity rather than voltage?
Specific gravity check with hydrometer
Terminal cleaning with baking soda
Battery load test under controlled draw
Electrolyte level visual inspection
