Automotive Electrical Systems Quiz

What does a fuse do in an electrical circuit?

• Stores electrical energy

• Measures electrical signals

• Protects the circuit by breaking the connection if the current is too high

• Converts electrical signals into mechanical action

Which device is used to measure voltage, current, and resistance in an electrical system?

• ECU

• Diode

• Digital Multimeter (DMM)

• Capacitor

What does a capacitor do in a circuit?

• Allows current to flow in one direction only

• Stores and releases electrical energy

• Converts electrical signals into mechanical action

• Measures physical conditions

Which component allows current to flow in only one direction?

• Resistor

• Diode

• Capacitor

• Actuator

What is the function of the ECU in a vehicle?

• To measure voltage, current, and resistance

• To manage various systems including engine performance and safety features

• To convert mechanical energy into electrical energy

• To store electrical energy

What is the purpose of a CAN Bus (Controller Area Network) in a vehicle?

• To control the vehicle's speed

• To allow microcontrollers and devices to exchange data without a central computer

• To provide power to the vehicle's lights

• To monitor the vehicle's fuel efficiency

What is the function of a circuit breaker in an electrical circuit?

• To increase the voltage

• To automatically interrupt the flow of electricity during an overload

• To provide a backup power source

• To connect the battery to the engine

What is a voltage drop in an electrical circuit?

• An increase in voltage across a component

• A reduction in voltage across a component due to resistance

• A complete loss of power

• A surge in electrical current

Which of the following can drain a vehicle's battery if excessive?

• Voltage drop

• Parasitic draw

• Circuit breaker

• Ground strap

What can a circuit breaker do after interrupting the flow of electricity?

• It cannot be reset

• It can be reset

• It increases the current

• It decreases the voltage