Regarding oscilloscopes, who is correct: Technician A says the vertical positions represent time, Technician B says the horizontal positions represent voltage?

The correct answer indicates that neither technician has accurately described the functions of the oscilloscope. In the context of an oscilloscope, the vertical axis typically represents voltage, while the horizontal axis represents time. This allows the user to observe how a voltage signal changes over time, essential for diagnosing electrical issues in automotive systems.

Since Technician A incorrectly states that the vertical positions represent time, and Technician B incorrectly claims that the horizontal positions represent voltage, both are incorrect in their descriptions. Understanding these axes is crucial for anyone using an oscilloscope, as they provide critical information about the characteristics of electrical signals being tested.