FE Materials Session 2022
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- Опубліковано 28 лип 2024
- FE Exam Review Session: Economics and Ethics
Problem sheets are posted below. Take a look at the problems and see if you can solve them ahead of time. See the video for solutions. Feel free to ask questions!
See for problem sheets: sites.google.com/view/markmat...
This is a question based review with questions that will cover topics that address each topic in the NCEES FE Civil exam specification.
The Materials topic includes:
A. Mix design of concrete and asphalt
B. Test methods and specifications of metals, concrete, aggregates, asphalt, and wood
C. Physical and mechanical properties of metals, concrete, aggregates, asphalt, and wood
For the series see the playlist at • FE Civil Review 2022
My deepest condolences to you Mark, it sounds like you're dad was a great person and really inspired you. Thank you for doing what you do and I hope to give back to the engineering community someday the way you do.
Let me start out by saying that I am struggling to study for this FE exam and find no motivation to do it, however, your videos have brought so much motivation and are so easy to follow that you helped me study so much. I know this video is 2 years old but it is still helping many people. My sincerest condolences to you and your family, I am sure your father was a great man seeing how you have turned out to be such a smart and kind soul. May God be with you and your family at all times.
I'm sure your dad would be so proud of the work you've done. I am inspired by you! Thank you for all these videos, they mean so much to many of us!
Your videos have been super helpful in my study FE prep! Also I’m sorry for your loss Mark, my condolences to the Mattson family.
Hey Mark I want to dedicate my session towards passing here for your dad. You're a living passion and a great son and father. Thank you for always helping us out. Peace and Love truly.
Just passed the FE Exam. I focused on water resources during my undergraduate and was worried about the structural aspect of the exam. Your videos helped clearly describe the fundamentals required to pass the exam. Thank you!!
Mark, I wanted to thank you for all of your teachings, i'm from Pennsylvania and successfully passed my FE exam, due part by watching your videos... multiply times over the past several months. During the test i could almost hear you reminding me not to forget certain formulas or the alternative formulas... very helpful!!!! Keep up the good work!
Just passed my FE this morning. Wanted to say thank you for how helpful your review videos were. They were the only study method I used!
That ending joke was amazing. I'm so thankful for the learners and teachers of the world! Thanks for all you do Mark!
Hello, Mark, Thank you very much for uploading the videos, which are very helpful for my passing the FE CE exam. I took it on 7/2 and got the result of pass. I am so lucky to have your videos help me through the study and review. Don't know how to express my thanks to you. So I came back and leave a comment here. Good luck to all who are taking the exam.
Congrats! I'm super happy for you and wish you the best in your career!
Went through each lecture and passed my FE last week. Thanks for the help!
Congrats! Glad it helped!
did you use any other books to study? or just the videos?
Hello Mark, even though I am watching this video a year away, I want to give my condolences to your family, Mom and Siblings, for the passing of your Dad. And also thank you for your videos. In a couple of moths I am planning to take the FE exam and I find your videos pretty helpful.
Hi Mark,
Thank you for the videos, they really helped me pass my FE exam! 9 years after graduating!
Thank you for all these videos, they mean so much to many of us!
So sorry for your loss!
Watching your video even now in prepping for my exam. You make the content so much easier to understand more than most of my professors but I also feel like this is an awesome refresher. I just wanted to say thank you and I hope you and your family are doing well. We appreciate you for all that you do!
Thank you Mr. Mattson, these videos are a huge help! Greetings from California!
You. Are. Incredible. My deepest condolences to you and your family. I felt really inspired by your encouragement to live life fully, learn with joy, and pour out love. Watching your videos as I study for the PE. They feel really helpful!!
Thank you, Mark! I was waiting for this session.
For Q12, table 2 in the mechanics of materials section lists the specific unit weight of concrete.
Thank you very much for your perfect videos. I watched them as much as I could. I hope to pass my FE and write here that I did it.
Please accept my sincerest condolences.
Once again, I really appreciate your time and help.🙏
I passed my FE civil exam. Thank you very much, your transportation review was very helpful.
Congrats!
@@MarkMattsonPE thank you 🙏
I was surprised when I heard the professor Hover name drop only to realize you also went to Cornell! Thank you so much for making this series I just graduated and am brushing up to take the exam at the end of the month. 🤞🏼
Thanks for the review sessions Mark, they help a lot. And sorry to hear about your father's passing
You're an awesome instructor Mark. I'm so sorry to hear about your dad. He definitely raised a good and honest man. Honored to be watching your videos!
Just started watching your videos. I liked you already! A lot of concept !
Hi Mark, I am sorry for your lost,
You are awesome, I am watching your videos to take my FE exam. I just wanted to say Thank you
I passed the exam! Thank you so much!
Thank you for your video. You are a true inspiration to me.
Thanks Mark for this useful video, I was really interested listening to you.
Sorry for your loss and my deepest condolences
Thanks Mark for making all these videos, I watched almost all of them and they were a tremendous help in me passing my FE Exam. Really appreciate all the effort you put in helping us pass this exam, THANK YOU!
A huge CONGRATULATIONS! I'm so glad they helped.
Thank you so much Mark. My condolences for you loss
Thank you so much Mark. I passed the FE exam today on my first attempt. Your videos help a lot. I watched all your review session and bought an exam sample on NCEES site.
Got my result today, and I passed. Thank you very much.
Hi Mark, Finally I passed FE exam last week (8/14 FE-CIVIL exam). I really appreciate your videos. Now I am planning to take PE exam (PE - Geotech) at the end of this year. I may watch your videos about statics and structural engineering. If you have a plan to make PE the Breadth part, it will be really helpful for me. By the way, I respect all your help. Thank you, Mark!
You're a life saver, Mark!
Just got a pass result! Thanks so much Mark!
Mark, I finally passed! Thanks for the extremely useful video series. You the man!
@Seth Overby CONGRATS on passing! I wish you all the best!
You are great. This channel is helping me a lot to prepare for the FE. Thank you Mark and God bless you and your family 💌
: Hero! For my gratitude of your splendid-closure is with the plain-language-communication-teaching-sessions by the Mark: Mattson
Hey Matt. For Question 12, weight of concrete is given. But it is in Pound per cubic inches. Converting it to lb/cf, we get about 148.6. Hope that helps.
Table on Page 139
I was taught in college that modulus of elasticity for concrete was always
57,000*SQRT(f’c) = Ec
Yes, that's the simplified version (which is also what I teach). For a unit weight of concrete of approximately 144 lb/ft, the equation in the Reference Handbook reduces to 57024 *sqrt(f'c) which is where the approximation you mentioned comes from.
Hey Mark, thanks for your help. My question is on question number 4. When we do concrete batch plant inspection what we do is we just take 2% of fine and coarse aggregate, add up those values and minimize it from total water . By that calculation we get 207 which is answer A’ . So that’s wrong we been doing or what’s different in this question. Thank you again for your time.
Thank you very much!
Great pep talk at the end of your video, made my day! Sorry about your Father, my condolences.
-Nick Balduzzi your former student!
Nick, great to hear from you!
Mark you are the best Thanks for everything, Merci, Shokran, Sepas
ACI 318-08 gives elastic elastic modulus as Ec = 0.043 (wc^1.5)√ (f’c), MPa, Where f’c is specified compressive strength of concrete Wc is unit weight of concrete
My deepest condolences to you Mark
My deepest condolences to you Mark, I am sure he would be proud of you. God Bless you.
Thanks for the video
Thank you a million ❤
Problem 4: For the coarse aggregate, you write out 1725.3 - 1691.5 = (sic) 25.37 (102% - Oven Dry) to determine the extra water contained, but your calculation reflects 1725.3 - 1700 = 25.37 (102% - SSD). While on the fine aggregate, your calculation is 1560.3 - 1545 = 15.3 (102% - SSD). I'm guessing the calculation of 102% - SSD is the correct form. Coincidentally, if you calculate 102% - Oven Dry, 207 is the solution.
Hey @Scott Simon, thanks for the comment... I actually wrote 1725.37 - 1691.54 = 33.83 lbs. In other words, there's 33.83 lbs of water when there's a 2% moisture content. That includes 8.46 lbs of water that is absorbed by the aggregate in SSD condition, and 25.37 lbs of excess water. I didn't write out the equation to get to 25.37 lbs of excess water (33.83 lbs - 8.46 lbs). The excess water is what we need to know so that we can figure out how much we need to reduce the mix water by. Thanks!
I just want to point out about the wood adjustment factors question that the load duration factor is only applied when using ASD. If using LRFD there are different factors used. The question should identify which we should be using.
Thankyou for everything
For Q4, we can use Correct Factor =(100+Moisture content)/(100+Absorption)
Hey Mark, I have passed my FE exam thank you for your awesome videos!!!
Fantastic!
Recently passed the FE Exam after watching your videos! Thanks Mark. With the PE switching over to the CBT format, would you be able to start doing videos for PE exams as well?
Congrats on the FE pass! I have a few things planned. I have thought about a PE review, but that is a monumental undertaking that I won't have time for right away. If that changes, I'll be sure to post. I wish you the best!
Hi Mark, for the modulus of elasticity question at time 1:02:47, how did you decide that the obvious point of intersection was at 30,000 psi? If I would have chosen say 40,000 psi, I believe the strain would be 0.002. But if I choose that point my answer would be incorrect. Can you help me understand please?
Hi Mark! For Problem 4, when considering coarse aggregate, you subtracted the oven dry weight from the weight of the water needed at 2% moisture content (1725.37-1691.54=33.83 lb). This step makes complete sense to me. What confuses me is why for fine aggregate, you subtracted the SSD WEIGHT from the weight of the water needed at 2% moisture content (1560.3-1545=15.3 lb) INSTEAD of the OVEN DRY WEIGHT (1560.3-1529.7=30.6 lb). Shouldn't the extra water for Coarse AND Fine Aggregate be calculated as (wt. needed @ 2%) - (Oven Dry)? If I am correct, the final answer would be 270 lb - 25.37 lb (C.A.) - 30.6 lb (F.A.) ~ 207 lb (Answer A). Let me know! Thanks for the great content.
For both coarse and fine, we're trying to find how much extra water is included at 2% moisture above SSD. In essence you take weight needed @ 2% and subtract the SSD weight needed to see how much excess water there is.
For the coarse aggregate, there is 33.83 lbs of water above oven dry and 25.57 lbs of water above SSD.
For the fine aggregate, there is 30.6 lbs above oven dry and 15. 3 lbs above SSD.
Does that help?
for anybody still confused on this It took me aa while to figure it out but 231 is correct. take the water required and subtract that value from the oven dry. (1560.3-1529.7=30.6) Subtract this value then from the ssd water. (1545-1529.7=15.3lbs) This is the value that was skipped. If you then subtract 30.6 and 15.3 you get 15.3 extra water. Add 15.3 and 25.57 for your additional waters and subtract from the initial water of 272lbs for the 231lbs answer he got. Hopefully this helps out a bit more.
I have read the comments and I still have doubts about the correct answer in problem 4.
At 1:16:08 I notice that the 145 is in lb/ft^3 and the fc is in psi. There is no need for any conversion for wc to convert to lb/in^3?
Thanks for all the help Mark!
The units are funny in the concrete equations. Always try to use psi for f'c and fy. If you're taking the square root of f'c it's going to be in psi.
Hello, Mark! Passed the FE exam on my first try and can't be grateful enough for all the videos you uploaded! I got my undergrad not in the US, so it was hard to catch up, but videos really helped! Thank you a lot :)
I wish you all the best!
for last question Repeatitive use and Flat does impact the strength. But u did not ticked them
It depends on the use of the member. Repetitive and flat use are for bending. You probably won't see this problem on the exam, but I wanted to highlight the variability of wood and the numerous factors that go into its design. In that way it's much different than a homogenous isotropic material like steel. Best!
Amazing videos, They have been my best tool to prepare for the FE.
I have a question. Which is the software you used to write in the pdf document? Please let me know
I use Drawboard. There's a free version and I've found it super useful for annotating pdfs.
@@MarkMattsonPE and also, which is the software that you use to stream live here at youtube and the software to put your camera in the corner without the background? Thanks a lot. I really appreciate your help Mark.
Is there a reason you don't use the values from the calculator but sometimes round to random significant digits? My answers from your videos are always sort of off because i use the value i get from the calculator
Hello Mark, thanks in advance for your help. Question#4:What is the reason why when you are going to calculate the extra water in a coarse aggregate you subtract the 2% ssd weight minus the 1% ssd weight, instead of the 2% ssd weight minus the dry weight , in order to obtain the extra water weight. I don't understand why you don't follow the same idea for both aggregates? Thank you,
dang I had the same question
I already know there's no way I would get question #4 right on the test. I'm skipping that lol
Okay. I spent the time to follow Mark's method and I discovered a solution that's much quicker.
Step 1) Coarse aggregate
Weight, SSD @1.5% = (1,700 lbs / [100+(2-0.5)]%) = 1,675 lbs
Water = 1,700 lbs - 1,675 lbs = 25 lbs
Step 2) Fine aggregate
Weight SSD @1% = (1,545 lbs / [100+(2-1)]%) = 1,530 lbs
Water = 1,545 lbs - 1,530 lbs = 15 lbs
Step 3) Total water
Total water = 272 lbs - 25 lbs - 15 lbs = 232 lbs.
Essentially, instead of calculating the weights at both the factory conditions and what we need it be at, I just took the differences between the two.
Do you know how many people were dead in that cemetery Mark?
all of them
😂 !!!
oh, hi, Mark
oh, hi, Sam :)
❤❤🙏
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