Tuesday, July 6, 2010

Lesson 26: Technician Class Exam Prep T7D

Here is lesson 27 covering the T7D questions form the question pool dealing with Basic Repair and Testing.  Despite the title, there really isn't too much on basic repair in this section.  This lesson primarily goes over soldering and the use of ammeters, voltmeters, and ohmmeters.  The stuff to remember for this section is:

-Ammeters measure current (amps) and need to be connected in series with the circuit.
-Voltmeters measure EMF (voltage) and need to be connected in parallel withe the circuit.
-Ohmmeters measure resistance (ohms).

As always, please leave any questions, comments or suggestions in the comments box.



  1. I assume these questions are up to date.

    Check out my video study blog.

    Helps you study and prepare for test.

  2. Thank you so much for these videos! I'm planning to take my exams next week!

    Regarding T7D11... Yes, we should make sure the circuit is not powered when checking resistance, but (as we saw with T7D10) if there is a capacitor charging, it is likely from the power in the multimeter. That is, after all, how the meter is checking the resistance, isn't it?

    1. Update: I tested and got up to General! I attribute your presentation as a big part of my learning the material I needed! Thank you very much!

      73, KC1IYZ