A headlamp circuit has a resistance of 4 ohms and operates on a 12-volt battery. What is the current flowing through the headlamp?
Electrical Circuits And Schematics
Question · Easy
Same battery. Which lets more through?
Short
Insulated gloves and boots on a 12-volt vehicle: what are they actually protecting against?
Workshop Safety and PPE
Flashcard
In a series circuit containing two resistors, R1 = 5 ohms and R2 = 10 ohms, connected to a 12-volt battery, what is the total resistance of the circuit?
Question · Medium
Introduction & Assessment Overview
About the SVP Auto Electrician Assessment
Study guide
Cheat sheet
Two parallel-connected bulbs are powered by a 12-volt battery. If bulb 1 has a voltage of 12 volts across it, what is the voltage across bulb 2?
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Lockout/tagout on a vehicle: what does the padlock and tag secure?
A circuit wired in 16 AWG (about 1.3 mm2) cable supplies a load that draws 8 A continuously. Which standard ATO blade fuse should protect it?
Relays Fuses And Wiring
A starter motor circuit draws 200 Amperes. The battery cable resistance is measured at 0.005 ohms. What is the voltage drop across the battery cable?
Question · Hard
What hazard makes a charging lead-acid battery an explosion risk in a closed workshop?
When measuring current in a circuit with a multimeter, how should the multimeter be connected?
Multimeter Fault Finding
Electrical Fundamentals, Circuit Laws & Schematics
1.1 Ohm's Law, Watt's Law & Circuit Calculations
Before arc-welding a bracket onto a vehicle body, what should the auto electrician do to protect the electronic modules?
Safety And High Voltage Systems
First action when sulphuric acid from a battery contacts the eyes.
What is the main purpose of a relay in an automotive electrical circuit?
A circuit has two 6-ohm resistors connected in parallel, and this combination is connected in series with a 3-ohm resistor. What is the total resistance of the circuit?
When is a HEPA-filter respirator needed instead of a light-duty face mask?
What typically happens when a direct short circuit occurs between a power wire and ground in an unprotected circuit?
1.2 Automotive Wiring Schematics & DIN / SAE Standards
If a bulb in a simple series circuit does not light up, and all other components are confirmed good, what is the most likely fault?
Why must water never be used on an energised electrical fire?
In a diagram drawn to DIN 72552 terminal markings, when is a wire connected to terminal 15 live?
What is the primary function of a capacitor in a DC automotive circuit, such as in an audio amplifier power supply?
Before working near an undeployed airbag, what step follows disconnecting the battery?
An electrical motor in a vehicle draws 15 Amperes from a 12-volt battery. Assuming 100% efficiency, what is the power consumed by the motor?
1.3 Series, Parallel & Series-Parallel Circuits
What is the primary function of a diode in an automotive circuit?
Orange cable on a hybrid or electric vehicle: what does the colour signal?
In an automotive electrical schematic, what does the symbol with three parallel horizontal lines of decreasing length, connected vertically, represent?
Using the widely published automotive voltage-drop limits, what is the maximum acceptable drop measured across a single ground connection?
Why does an anti-static wrist strap matter when handling a control module?
A junction in an automotive circuit has three branches. If 5 Amperes enter the junction through one wire, and 2 Amperes leave through a second wire, how much current must leave through the third wire?
Relays, Fuses, Circuit Protection & Switching
2.1 Fuses, Fusible Links & Circuit Breakers
An auto electrician is replacing a resistor marked with color bands Red, Red, Black, Gold. What is its resistance value and tolerance?
Crimped or soldered joint in a vibrating engine-bay harness: which is preferred, and why?
Wiring, Tools and Circuit Protection
What measurement mode on a multimeter is used to check if a wire has a break in it?
When diagnosing an issue related to an Engine Control Unit (ECU), which type of diagram is most helpful for identifying specific wire connections to and from the ECU?
What does adhesive-lined heat shrink add over ordinary heat shrink on a repair?
In an automotive ignition coil, what is the primary electrical principle that allows it to generate a high voltage spark from a low voltage battery supply?
2.2 Relays, Solenoids & Electromagnetic Controls
During a parasitic-draw test with a digital multimeter wired in series at the battery, why must the technician avoid opening a door or turning the key?
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