Susan Brown

[Susan Brown]

The wording in the unit is accurate. The ignitor is “on” whenever the circuit is energized.

I think the confusion was the word “running” that we had in the last question. By “running” we meant that the circuit was energized so that there would be a flame. But some people might think “running” meant that the oven was on and maintaining a certain temperature by switching power off and on to the ignitor/valve.

I just changed the last question’s wording to be more specific: “The ignitor stays on the entire time the burner tube is ignited in a gas oven.” (True/False)

[Susan Brown]

Different brands and models may vary, but the usual point of those options is to just have to select one thing and then start. I know that on my washer, I can choose an option and it will preset the temperature, spin speed, etc. so I can just then press “start” without doing anything else. But, if I want, I can make changes to those individual settings.

[Susan Brown]

Those are manufacturer settings for the different types of fabrics – they are basically preset for the optimal conditions for those fabrics. They are aimed at the customer who perhaps doesn’t know which settings are best, or prefer to trust the manufacturer. But, they also give the user various options to set their own temperature, etc.

[Susan Brown]

Hi – sorry for the delay in replying.

You’ll learn more about this in the Parts Module as well as the Oven & Range course – but there is a bimetal in the valve that opens when the right amount of current is going through.

[Susan Brown]

Hi John,
Most of the quizzes have the same time limit – it’s just the way the software works. It is not a reflection of the number of questions or difficulty.

For this particular unit, it’s just going over the Orientation info.

• This reply was modified 2 years, 7 months ago by Susan Brown.

[Susan Brown]

Hi Kfir – please see the email I sent you a few minutes ago. It is better to use email for issues like this.

[Susan Brown]

Hi Gregorio,
I see that you did got those questions correct on your second attempt at the quiz – I assume you found the information after posting this question. Is that the case, or do you still have questions?

[Susan Brown]

The key word in this question is “EXCLUDE.” In other words, which of the systems in the fridge do we know is NOT faulty, based on these temperatures.

We have a 0 degree freezer, which is the normal operating temperature. So there is one system that is obviously able to do its job.

Do you know which one I’m talking about?

[Susan Brown]

FYI – the actual LOI is the “LF” light, but they all function similarly.

[Susan Brown]

Let’s think that through.

Say you have two parallel circuits, and they each have a resistance of 10 ohms. The Equivalent Resistance of those two loads is 5 ohms.

The equivalent resistance is describing the resistance from the point of view of the power supply. Having two 10-ohm loads in parallel with have the exact same “feel” as one 5-ohm load in a single circuit.

If one of those circuits fails open, the power supply is left with a single circuit with 10 ohms of resistance.

Try drawing that out. You could even do some calculations. Assuming 120v supply. You can easily find the current in each circuit, and the overall current before and after the failure.

[Susan Brown]

Hi Jayden,

The highlighted portion in the video says “voltage”, not “current”. They are different things!

[Susan Brown]

Hi Kfir,

We did respond to this question over at Appliantology. It is on a second page of comments, so perhaps you missed it.

https://appliantology.org/topic/57677-webinar-voltage-measurements-meters-ghost-voltages-and-triac-controlled-neutrals-monday-march-28-2016-7pm-et/page/2/

There is a very math-and-science reason for what you are seeing with your calculations, but the bottom line is that with some loads, such as motor windings, the Ohm’s Law calculations that use resistance are not going to give you results that make sense. You want to stick with those that just use power, voltage, and current (P = I x E)

[Susan Brown]

You are actually correct – the correct answer is “none of the above”

[Susan Brown]

Good to think through these things! We would call that an unintentional shunt, since it would not “short out” the circuit.

[Susan Brown]

those are correct!

You know the voltage drop across the Safety because it has independent access to Line and N.

If the ignitor and booster also reach L1 and N without going through other loads, then are they not in the same situation?

And – what does this mean for the Main coil?

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