Adv Tech Practice Finals (Fall24)

Front

What is the function of Relay Terminal 86 in a vehicle's electrical system?

Back

Relay Terminal 86 is typically connected to the control side of a relay, which activates the relay when a signal is received.

Front

What is the significance of a 720-degree crankshaft rotation in a 4-stroke engine cycle?

Back

In a 4-stroke engine, the crankshaft completes two full revolutions (720 degrees) to complete one cycle of intake, compression, power, and exhaust.

Front

What does a multimeter set to 'Continuity' measure?

Back

It checks if there is a complete path for current to flow, indicating whether a circuit is closed.

Front

How do batteries store electricity?

Back

Batteries store electricity in chemical form, which is made possible by chemical reactions occurring within the battery.

Front

What are the two sides of a relay?

Back

A relay has a 'Switch' side and a 'Low Amperage' side.

Front

What could cause a 0V reading at Relay Terminal 86 while cranking the ignition switch?

Back

Possible causes include a faulty ECU, missing input signal, or an open in the PPL/Wht wire, but not an open in the relay coil.

Front

What is the role of the ECU in a vehicle's electrical system?

Back

The ECU (Engine Control Unit) manages engine functions and processes input signals to control various components.

Front

What is the difference between DC Volts and DC Amps?

Back

DC Volts measure electrical potential difference, while DC Amps measure the flow of electric current.

Front

What does an open circuit indicate in a relay system?

Back

An open circuit indicates that there is a break in the path, preventing current from flowing and the relay from activating.

Front

What is the purpose of a relay in an electrical circuit?

Back

A relay acts as a switch that allows a low-power signal to control a higher-power circuit.