final exam part 1

Question #6 – You’re troubleshooting an electric dryer for a no-heat complaint. The schematic is shown below. You start the dryer in a heat cycle and measure 0 V AC across the heater with both wires still connected to the heating element. What does this tell you?

We are measuring across the heater. L1 wrt L2. In other words, looking for voltage drop across the heater.

What does a zero measurement here mean?

Right – and what does that tell us about the functionality (or lack thereof) of the circuit?

If you aren’t quite sure, think about what creates voltage drop.

Yes. As a result, there’s no current, and thus no work being done.