"Watt Are You Thinking?"
This law states that voltage equals current multiplied by resistance.
What is Ohm’s Law?
This common diagnostic tool measures voltage, resistance, and current in a circuit.
What is a multimeter?
This is the main purpose of a vehicle’s battery.
What is to provide electrical energy to start the engine and act as a surge protector?
This component is responsible for engaging the engine's flywheel to start the vehicle.
What is the starter motor?
This component generates electricity to recharge the battery while the engine is running.
What is the alternator?
This type of bulb is commonly used for headlights and provides a bright, white light.
What is a halogen bulb?
Always disconnect this terminal first when removing a vehicle battery.
What is the negative terminal?
A circuit where current flows through one continuous loop without branching is known as this type of circuit.
What is a series circuit?
This tool uses a small bulb to determine the presence of voltage in a circuit.
What is a test light?
The standard voltage of a fully charged automotive battery.
What is 12.5 - 12.6 volts?
This safety device prevents the starter from operating when the vehicle is in gear.
What is the neutral safety switch?
The device inside the alternator that controls its output voltage.
What is the voltage regulator?
These long-lasting, energy-efficient bulbs are commonly used in modern vehicle lighting systems
What are LED (light-emitting diode) bulbs?
Before working on high-voltage hybrid systems, technicians must wear these protective items.
What are insulated gloves?
This type of circuit has multiple paths for current to flow.
What is a parallel circuit?
A reading of infinite resistance on an ohmmeter indicates this condition in a circuit.
What is an open circuit?
This test measures a battery’s ability to supply high current while maintaining voltage.
What is a load test?
A slow cranking engine often indicates this issue with the starting system.
What is low battery voltage or a bad starter motor?
This component allows current to flow from the alternator to the battery but prevents reverse flow.
What is a diode trio?
This type of headlight uses a gas-filled bulb and produces a bluish-white light.
What is an HID (high-intensity discharge) bulb?
This safety device prevents electrical shock by interrupting a circuit during an overload.
What is a fuse?
This term refers to opposition to the flow of electrical current in a circuit.
What is resistance?
This type of meter clamp allows a technician to measure current flow without disconnecting wires.
What is an inductive ammeter or clamp meter?
A battery that is swollen or leaking is likely suffering from this condition.
What is overcharging or thermal runaway?
This test is used to determine the condition of the starter motor under load.
What is a starter draw test?
Alternator output is tested by connecting this simple tool to the battery terminals while the engine is running.
What is a voltmeter or "D.V.O.M."?
This tool is used to measure the alignment and aim of vehicle headlights.
What is a headlight aiming tool or headlight alignment tool?
This type of fire extinguisher is required in an automotive shop to handle electrical fires.
What is a Class C fire extinguisher?
This type of short occurs when an electrical path bypasses the intended circuit load, often causing blown fuses.
What is a short to ground?
Before testing for voltage on a vehicle, the multimeter should be set to this range.
What is the DC volts range?
These are the two chemical components typically used in lead-acid batteries.
What are lead dioxide and sulfuric acid?
This gear connects the starter motor to the engine’s flywheel or flexplate.
What is the pinion gear?
A slipping or worn serpentine belt causes this symptom in the charging system.
What is insufficient alternator output?
This is the recommended practice when handling halogen bulbs to avoid shortening their lifespan.
What is avoiding touching the bulb with bare hands?
This device prevents static electricity from igniting flammable fumes while working in the shop.
What is a grounding strap or antistatic strap?
This electrical property is described as the difference in electric potential energy between two points in a circuit.
What is voltage?
This tool is used to measure the specific gravity of battery electrolyte to assess battery health.
What is a hydrometer?
This term describes the process of converting chemical energy into electrical energy within a battery.
What is electrochemical reaction?
This square electrical component controls high current to the starter using a low current ignition switch.
What is the starter relay?
The three electrical windings in the alternator stator are arranged in this configuration.
What is a three-phase configuration?
This measurement describes the color temperature of light, often listed in "Kelvins."
What is color temperature?
When cutting or splicing electrical wires, this tool should be used to ensure clean and precise cuts.
What is a wire stripper/cutter?