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Susan Brown

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Viewing 15 posts - 1,381 through 1,395 (of 1,968 total)
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  • in reply to: Module 3 Unit 1 Quiz #17830
    Susan Brown
    Keymaster

      The other two options are:

      Defective water pressure switch
      Someone removed the protective screen on the water inlet valve letting sediment into the valve

      in reply to: Module 3 Unit 1 Quiz #17828
      Susan Brown
      Keymaster

        Thanks for asking about this. We evaluated the question and answers and decided that it isn’t clear, so we added another bit of information to the question.

        Here’s the question now. See if this helps you figure out the correct answer:

        Question #6: You’re on a service call where the washer overfilled and flooded, and didn’t stop filling even when the customer unplugged the machine. What do you suspect?

        in reply to: CS7 LOI circuit analysis light power source. #17825
        Susan Brown
        Keymaster

          Ah – I just sent you an email before I saw this. You are now correct! I did reset you.

          Susan Brown
          Keymaster

            Awesome – so glad to hear it!

            Susan Brown
            Keymaster

              That’s correct!

              Susan Brown
              Keymaster

                Which of the following is NOT one of the points made about voltage and current in the video for this lesson?

                There is no absolute 120 volts out there somewhere
                There is no absolute 10 amps out there somewhere
                All voltage measurements must be made in comparison with some other point.
                We arbitrarily designate the earth as having a charge of zero.
                Voltage is a difference in charge between two points in an electric circuit.

                in reply to: Module 11 Unit 4 #17792
                Susan Brown
                Keymaster

                  Good job!

                  in reply to: Module 7 Unit 3 #17787
                  Susan Brown
                  Keymaster

                    Here’s a hint: there are 4 correct answers to this question.

                    in reply to: L1 and L2 #17777
                    Susan Brown
                    Keymaster

                      No, it shouldn’t make a big difference at all. It is just in the section about electric dryers that we talk about L1-L2. Otherwise, all the information will be good for you.

                      in reply to: L1 and L2 #17775
                      Susan Brown
                      Keymaster

                        Hi Adrian,

                        Yes, this difference in power supply is the only significant difference you will find in the course due to the fact that you are in Europe and we are in North America.

                        In Europe, you don’t have the split-phase power like we do. Your Line – N is around 230vac, and as I understand it, all of your appliances and electrical devices run off of that.

                        Nearly all of our home appliances (and other electric items) run off of 120vac (Line – N).

                        The only appliances that run off of 240vac (L1-L2) in the US are electric dryers and electric ovens.

                        So even though our split-phase power is not directly relevant to where you live, it will benefit you to learn this, since it will deepen your understanding of electricity works.

                        in reply to: Mod 3 Unit 4 #17761
                        Susan Brown
                        Keymaster

                          What do you want to mean with the expression “as far as the battery is concerned, the configuration are the same”?

                          I’m not sure where exactly we say this (if it’s in a video, it would be helpful to give me the time in the video where it is said), but it sounds like what we say when we are showing that schematic configurations can be drawn in different ways, but actually showing an identical configuration (which means, the way things are arranged or laid out). In other words, an electron would see them as being the same.

                          And another thing,the formulas from the ohm law’s are equals?Example from the Power formulas(P=ExI is not the same with P=IxIxR).

                          Yes, they are. For example, E=I x R. So, if you take P=I x E and then put “I x R” where the E is, you get P= I x I x R

                          Short and shunt

                          These are both based on the same fact: if an electron has two paths available to it, and one of them has zero resistance, but the other one has a load, it will take the path with zero resistance 100% of the time.

                          A short is a fault condition where something happens that causes a path for electrons to flow (a complete circuit) from the power supply to N (or ground) that does NOT have a load (resistance) on it. So, there’s nothing to slow down the flow of electrons. This will usually cause a blown fuse or some other failure.

                          A shunt is a deliberate circuit design that creates an alternate path for electrons to flow around a load, but there is still at least one other load present in the overall circuit, so you don’t get the fault described above. Usually the shunt is controlled by a switch.

                          in reply to: Mod 3 Unit 3 Loose connection #17757
                          Susan Brown
                          Keymaster

                            Hi Adrian,

                            A loose connection would be something like a wire that is pulling away from the connector, or the connector itself not being firmly seated onto the connection point. It could also be a terminal that wasn’t crimped or clamped correctly.

                            Any time wires are connected to each other or something else, but the connection becomes loose.

                            You are welcome to ask things like this any time. Besides technical terms that may confuse you, we sometimes use slang as well that you might have a hard time following.

                            in reply to: Half-Splitting #17754
                            Susan Brown
                            Keymaster

                              You need to know the definition of EEPs. Here it is from Module 5, Unit 4:

                              The two characteristics of EEPs are:

                              1) They have electrical continuity with each other. In other words, if you measure the resistance between two points that are electrically equivalent, you will measure zero ohms. It would be like measuring the resistance in a section of wire.

                              2) There is zero voltage difference between points that are electrically equivalent. If you were to measure voltage across two EEPs, you would read zero, even if both points were at 120vac.

                              You can only identify EEPs by studying the schematic and finding testing points at a convenient location (like the control board) that are electrically equivalent to the testing points that you would use if you were at the load of interest itself. It’s often just a wire that comes from the load to the control panel, that has no other loads or open switches along the way.

                              It may take some practice. Look for videos of ours that demonstrate using EEPs. We’ve got lots of them! Anytime you see us taking measurements at the control panel, you’re probably seeing us using EEPs.

                              in reply to: Amperage and Voltage #17751
                              Susan Brown
                              Keymaster

                                No problem! So, you understand it now? We’re always happy to answer questions here.

                                in reply to: Mod 3, Unit 6, Measuring voltage across L1 and L2 #17750
                                Susan Brown
                                Keymaster

                                  Hi there! Yes, voltage measurements are always live (connected to the power supply). That’s where the voltage comes from.

                                Viewing 15 posts - 1,381 through 1,395 (of 1,968 total)