Susan Brown

[Susan Brown]

Hi Darren,

He uses a standard Apple iPad that he got a few years ago.

Here’s the page at the Danfoss website with various downloads for the Refrigerant slider (now called Ref Tools), including a web version you should be able to use on your laptop.

https://www.danfoss.com/en-us/service-and-support/downloads/dcs/ref-tools/#tab-overview

You can download apps onto any devices that you have!

[Susan Brown]

Okay, Everardo. I reset you.

[Susan Brown]

Hi Aaron,

The thing to remember about Module exams is that you’ve seen these questions before in the Unit quizzes. So, it is giving you important information about which areas you still need to get stronger on.

Go back through your Module 3 quizzes. Be honest with yourself – which questions/answers do you understand, and which ones are you still shaky on?

For the ones you are shaky on, review the material in the unit and/or get help from us here in the Forums.

Are you keeping a notebook? Taking notes as you go through the units is really important.

[Susan Brown]

We told you about the book in the “preflight checklist” in the Orientation.

We also told you about a .pdf version that you can use for free in Module 3, unit 1.

See this topic

https://my.mastersamuraitech.com/appliance-repair-course-support/student-forums/topic/free-pdf-textbook/

[Susan Brown]

I’m going to help you with #9 tomorrow. You don’t seem to have been following the train of thought with that one.

[Susan Brown]

So that mean, are booster and ignitor in a parallel circuit?

correct. Does any current go through the Main coil?

can you email me #7 answer that you hid it.

You should be working on these questions in your notebook, and I would hope you are understanding the answers well enough to re-create them.

[Susan Brown]

#8: If you become the Booster, why would you not make the same choice as the ignitor and go through the detector switch to get to N? (electrons don’t “see” or feel any bends or turns in wire. They only feel resistance and voltage.)

#9: that’s correct. We know the element has continuity, so there must be an open on one side or the other. How do the measurements in Figure 2 give us more information about the location of the fault?

[Susan Brown]

I am happier! 🙂

#5 and #7 are now correct. (I hope you are writing all of these down.)

Another way to think about #7, part 4, is that we’ve lost current in one branch, but it is unchanged in the other, so the overall current is lower.

#8
Yes, the ignitor reaches N through the detector switch.
What about the booster? Do the Zen trick on that.

#9
There is still more detail we want to see. Please answer this:
What do the measurements in Figure 1 tell us about current flow? (Think about what creates voltage drop, and the fact that we are measuring 0vac across the element.)

[Susan Brown]

#4 is correct. I am going to hide your answer so we don’t give it away to other students.

#5

#5 = I/ R1+R2+R3
Therefore:
1/ (1/10ohm+1/20ohm+1/40ohm) 1/ (0.1+0.05+0.025)
1/0.175 = 5.71ohm

You’ve got the correct formula for calculating equivalent resistance.
But look at the diagram again for Question 5. Can you see what you did wrong above?

#7: part 4 is incorrect. Watch the last video in Unit 4.

#8: do the “zen trick” on the ignitor. How do you reach N?

#9:

Suppose to be 240 ac V

true

but as it shows L1 & L2 have no power supply both line somewhere disconnected.

Are you saying that both L1 and L2 appear to be disconnected? Then where is the 120vac that we’re measuring coming from in Figure 1?

Look at Figure 1 again. We know that the element has continuity (we say that in the problem statement.) We know there is some voltage present.

Question: Is current flowing in the circuit?

[Susan Brown]

We’re happy to help.

A couple of questions to start with:

1. You had gotten 4 and 5 correct on your first attempt. Do you not remember how you did those?

2. Did you read through the Help Page and follow any suggestions there?

[Susan Brown]

Hi Ted,

Glad to help. Which unit in Module 3 is this about?

[Susan Brown]

Okay, great! It will be worth the effort, and we’re here to help you as much as you need.

God bless you, too!

[Susan Brown]

Hi Everardo,

The questions that you keep missing are important concepts that you need to know for electrical troubleshooting.

Do you keep a notebook and take notes when you watch videos and go through each unit?

Have you gone back over each unit quiz and made sure you understand all of the questions and answers?

[Susan Brown]

Hi Jason – no worries. We’ll grade it and if you don’t get what you need to pass, you’ll have a second attempt.

[Susan Brown]

Hi Everardo,

Yes, I’m on the east coast, so the timing isn’t great for you. Don’t worry – once you get through the Midterm, you will be able to move more quickly. This Basic Electricity information is often the stuff that takes longer for students to get.

I=E*R 240*37=6.5 amps
P=IxI R=6.5×6.5×32=1350 watts.

You are close! The question we are working on is this

Question #38 – You’re working on an appliance with the circuit configuration shown below. R1 = 5 ohms. R2 = 32 ohms. If everything is working correctly, what is the expected heat produced by R1?

R1 is 5 ohms. So to answer #38, your second step should use 5, not 32, in the calculation of P.

I reset the Module exam for you.

[Author]

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