Susan Brown

[Susan Brown]

At a minimum, and oven does two functions: bake and broil.

That gives you the answer right there!

(Note – I moved your question to a new topic, which is what we prefer you to do unless you are directly replying to an existing thread.)

[Susan Brown]

That sounds right. Sensors will send feedback *to* boards. And loads will receive their power supply *from* boards.

In some applications, other information can come from boards, such as PWM signals. But that is typically in washers and refrigerators.

[Susan Brown]

Hi Peter,

One way to think of it is that an input is something that the board will then do something with. An example (and one of the answer choices you got correct) is thermistor temperature. That is information that the board will use to then control other loads.

An example of an incorrect answer to this question is drain pump power supply. That is an *output* – the main board switches the power supply to the drain pump. The drain pump will not operate unless the board “tells” it to by switching on the power to it.

Unswitched power IS an input to the board.

Does that help?

[Susan Brown]

Hi Neal,
There are two correct answer choices. See the first video in this unit, starting around 1:30 in.

[Susan Brown]

No worries! We’d rather you err on the side of asking too many questions than not enough 🙂

[Susan Brown]

Hi Scott,

We don’t Certify any of the “short” courses, so you are correct – it doesn’t include Appliantology 101.

[Susan Brown]

Hi Richard,
I’ll give you more specific feedback when I grade the exam. But in general, there are many questions that only need a short answer. Some need more detail.

[Susan Brown]

Thanks, but I think I’ll leave this one. If someone takes the time to find it, the explanation will help them.

[Susan Brown]

Current is not exactly wrong, but it is not the best choice of the options that we give you.

The most important specification for a load is watts, which is power. Power is current AND voltage. So we are always encouraging techs to think in terms of power.

Current measurements are a good proxy for power, since we don’t usually have wattmeters on us, but we should always be thinking about “power” when it comes to loads doing work.

Make sense?

[Susan Brown]

The three resistances (two compressor windings and condenser motor) are in parallel. The two resistance specs for the compressor are given, you have to calculate the condenser from the specs given (watts spec is recommended).

Since the resistance of the condenser is several orders of magnitude higher than the compressor windings, the answer is basically just the Req of the two compressor windings. (See the Core course, Module 4, unit 5, video 2 for a review of equivalent resistance.)

[Susan Brown]

We also call it a temperature sensor for the cooktop elements. You have a second attempt available on that quiz, so you can retake it.

[Susan Brown]

No, the 240v outlets in North America are a unique configuration and take a different plug than the 120v outlets. You’ll see some pictures of those in the Basic Electricity module

[Susan Brown]

Although we have students from around the world, most are in North America, so we use North American power supply as our standard. It is hopefully interesting for you to learn, even if different than what you deal with.

My understanding is that in your part of the world, “Line and Neutral” provides 240v (or sometimes 230v), whereas in N. America it is 120v.

You will see in the Basic Electricity module, unit 6, how in North America the 240v at our electrical panels in our homes is split into two 120v lines. So, with only a couple of exceptions, the outlets in our homes are 120v. We have special outlets for electric dryers and ovens/ranges that provide 240v by combining two out-of-phase 120v lines.

Check this link out – it seems like a good explanation: https://www.bluesea.com/support/articles/AC_Circuits/87/Differences_in_USA_and_European_AC_Panels

[Susan Brown]

You’ll remember it now! 🙂

[Susan Brown]

Hi Sem,

Here is the correct answer: “The rotor does not use voltage, it’s just a series of permanent magnets in a tray”

(It’s a little bit of a trick question!)

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