final exam part 1

[Jim Ortiz]

question 6 in one of the units it was opposite it had 120 vac this is 0 vac if you check the heating element at both ends you should still get get voltage unless the heating element is bad?

[Susan Brown]

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?

[Jim Ortiz]

no voltage drop ?

[Susan Brown]

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.

[Jim Ortiz]

that it is open circuit

[Susan Brown]

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

[Jim Ortiz]

thank you

[Author]

Posts