Search Results for 'midterm'

[Susan BrownKeymaster]

Great! That’s the goal of the Midterm Exam 🙂

By the way, I’m going to hide parts of the answers in this thread so we don’t just give it away to others.

[Susan BrownKeymaster]

We already established earlier that:

The Safety is 120v, because it is always just by itself in a circuit, parallel to the others.

If you do the “Zen trick” on the Safety, you can reach L1 and N independently – you don’t have to go through any other loads or the detector switch. So it is completely parallel to the Ignitor, Booster, Main, and detector switch configuration.

Let’s try this a different way. Here I have traced out how L1 gets to each load in red, and then (partially) how each load is connected to N in blue. At the green arrow, how will electrons be going to and from N: through the closed switch, through the main coil, or both?

[Susan BrownKeymaster]

Do you remember Question 8 in the Midterm Exam? The detector switch is what controlled when the Main valve opened. (When it was closed, as in the diagram for #8, the Main was bypassed.)

[Susan BrownKeymaster]

Hi David,

In order to calculate the circuit current, you first need to know the total resistance in the load so you can do I = E/R.

Remember the Midterm exam question about the heat generated by the loose connection? You mentally added 30 + 6 to get 36 ohms, then went on to calculate the current.

[Susan BrownKeymaster]

Reminder: the Help Page I linked you to in your Midterm Feedback email has suggested units and videos for each question.

For #7, rewatch the videos at the end of Unit 4.

For #9, Look at Figure 2 on the Midterm and let me know why you think it is L2 that is at fault?

[Randy Perusse]

https://mrappliance.mastersamuraitech.com/wp-content/uploads/2019/11/fundamentals-midterm-series-circuit.png It is series circuit

[Susan BrownKeymaster]

When loads are in series, the total resistance in the circuit is just the sum of the resistances.

You did this on Question 3 of the Midterm as part of finding the circuit current:

I=E/R=120vac / 10+20+40=1.71 amps

(that is copied from your answer)

[Susan BrownKeymaster]

It sounds like you are looking over the Midterm study sheet. (Good!)

That’s referring to the information in Unit 6, particularly the video at the end.

[Eddon Lewis]

I did over the midterm. After just checking again i realize that for number 6 i typed 120v for the main when i meant to put that for the safety and 60v for the main. It’s difficult sometimes to see these mistakes when reading from the computer screen and even checking over.

[Susan BrownKeymaster]

Hi Jordan,

For the most part, Part 2 of Final Exam closely follows the kinds of questions you were asked during the unit quizzes throughout the course.

There are some basic calculations, but also a lot of asking you to describe some of the important concepts, strategies, and technologies that we taught in the course.

So the best way to study is to go back over your notes for each unit and the quizzes.

It has a much higher pass rate than the Midterm, by the way, but it is a lot longer. One important key is to stay relaxed. You always have a second attempt if needed!

[Susan BrownKeymaster]

I understand. But the purpose of the Midterm exam itself is to challenge you, not just to review what you’ve already practiced. There is a method to our madness! 😉

Don’t worry – it’s only 9 questions, so you have time to think about each one. And, you’ve got more than one attempt available.

[Susan BrownKeymaster]

Hi Martin,

First of all, don’t be nervous. You’ve got more than one attempt available, and we help a lot of techs with this exam.

The Midterm is a unique exam in the course in that it’s not just a review of other questions that you’ve already seen. It is designed to really probe how well you understand the Basic electricity, by asking you to apply what you’ve learned in a few scenarios.

Most students do need at least a second attempt to get 90% or higher. But, in the process, they get some “a ha!” moments.

Have you looked over the things we suggest that you study to prepare for the exam?

[Susan BrownKeymaster]

Question 6: we do an almost identical calculation in the video at the end of Unit 3. Can you follow along with how we did that? You were using the correct formulas, and you found the correct circuit current in your first step, but in your second step, one of the values you plugged into the formula was not the correct one, given what we asked you to find (the heat generated by the loose connection).

Question 9: Your answer to Part 2 was basically correct. For part 1, we want you to tell us what you can conclude from only Figure 1, before we do the half-splitting in Figure 2. We’ve told you the heating element has continuity. (Plus, if it were open, you would measure a voltage difference across it.) It’s not a complicated answer, by the way.

If you have more questions, reply below. If think you know the correct answers, don’t put them here – just reply to the email thread we’ve got going on the Midterm.

Once we’ve got these two settled, we’ll talk about question 8.

[Susan BrownKeymaster]

Oh – I sent you an email with feedback on the Midterm, along with the Help Page link, on November 18th. I’d be interested to know if it arrived in your inbox.

[Abygaele Crane]

I didn’t even realize there was a help page for the Midterm. Thank you. I’ll look over it.