浅仓彩音

浅仓彩音Welcome to our blog! I’m Dr. Tom, and I want to make this blog a place where the DTC Instructors and I can share not only the news about Dr. Tom’s Classroom, but also share insights on the Mechanical and Civil PE Exams, the world of mechanical and civil engineering, innovations in education and science, and, occasionally, wine-making.

October 9, 2019

PE EXAM TIP – Units, Units Units!!!


If I wasn't Dr. Tom, I'd be Dr. Units. I cannot tell you how many times units are the reason someone gets the wrong answer to a problem. It might be as simple as inches needed to be converted to feet, or the other way around. Or, it is a combination of units like gallons per minute converted to cubic feet per second, and something doesn't cancel. As I say as often as I can, if the units are not right it doesn't matter what the number is. And if it is a predictable error associated with units, then there is a very high probably that the NCEES will make that incorrect answer, answer A, and you now have one less point in your column.

And what makes matters worse, is that most of the solutions in the NCEES Practice Exam have no units, so trying to figure out how the units come out can be very frustrating. And some numbers in these solutions are combinations of unit conversions that I have spent more time than I'd like to admit trying to decipher what they have done. My strongest advice: stay with the basic unit conversions!

There is one thing you typically do not have to worry about relative to units and that is converting between systems, like converting meters to feet or the other way around. About the only time I have seen this required is when horsepower must be converted to kilowatts.

Again, before even thinking about picking up your calculator, make sure the final units are such that they match the units in the exam answers. Then just be careful making the calculation. Remember, you always have time to work the problems you know how to work. - Dr. Tom



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October 7, 2019

Cactus to the Pollution Rescue

Could the humble cactus be the solution to our plastic waste problem? Chemical engineering professor Sandra Pascoe Ortiz is beta-testing an edible, biodegradable packaging material made from the juice of prickly pear cactus leaves. The juice "is a natural polymer that can be improved by combining certain substances to give it a similar appearance and properties to those of some petroleum-derived plastics," she says.

I found a video posted on the BBC News site that explains the discovery and the process developed by Dr. Ortiz. With all the news lately about how much plastic waste there is on the planet, especially in our oceans, this is a dramatic ray of hope for a material that could literally change the earth. - Dr. Tom




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October 4, 2019

FEATURED TESTIMONIAL - Instrumental in Passing the Exam!

“After taking your course, I sat for the PE Civil Transportation Exam. I graduated from The Ohio State University in 1990. I have worked in the field for 27 years and this is my first time taking the exam. I received my NCEES results and I passed. Your course was instrumental in passing the exam.
 - Brent Tucker, PE, Pennsylvania




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October 3, 2019

Concrete - The Most Popular Man-Made Material on Earth

I’m not surprised that concrete is the most used building material, but I was surprised to find it’s the second most used substance behind water. I don’t think I’ve ever had a construction project where we didn’t use concrete. A fascinating article talks about the past, present and future uses of concrete. - Jason Savage, DTC Civil Construction Instructor





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October 1, 2019

Civil Engineers - $100 Savings Extended Through Oct. 31!


Now is the perfect time to start your PE Exam preparation with our 20-Week Reviews, and we’re giving you another whole month to take advantage of our $100 discount. Activate your super powers with discount code: civilhero20W.

Armed with the preparation, strategies and resources you get with a DTC Civil PE Exam review, you can achieve the extraordinary. DTC’s targeted, structured review will help you focus your efforts and make the most of the ideal 20-week exam preparation window, all with the support of a team that is dedicated to your success. Let us help you triumph over the PE Exam.

“With DTC’s help I finally passed the Civil PE exam after several previous attempts! The organization of the course material helped me out tremendously.”

– PE, Baton Rouge, Louisiana



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September 24, 2019

Civil Engineers! Time Is Running Out to Save $100!


Sign up by September 30 using the code civilhero20W to get your $100 discount, and now is the perfect time to start your preparation for the April 2020 PE Exam.

DTC’s targeted, structured review will help you focus your efforts and make the most of the ideal 20-week exam preparation window, all with the support of a team that is dedicated to your success. Let us help you triumph over the PE Exam.

“I passed the Civil Geotechnical PE Exam with a score of 79. Thank you for providing excellent tools for taking the test. It really was the best method to help me prepare well. I will be telling my colleagues about your course and how well it worked for me. Thanks again!”
- PE, Texas

Civil Engineers - Activate Your Superpowers!
September 1-30 Get $100 Off Any Civil 20-Week Review
Use Discount Code: civilhero20W

Mechanical Engineers - Change Is Here!
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September 20, 2019

FEATURED FREE CIVIL VIDEO - NCEES Civil WRE PM Practice Exam Problem 510 - Water Resources & Env: Open Channel Flow

Enjoy one of the most popular videos on the DTC YouTube Channel, with over 6,000 views!

Problem 510 is found in the PM practice exam for Water Resources and Environmental—but don’t be afraid to try it if you are just taking the AM portion as it’s a great problem to practice open channel flow computations!

This problem involves a channel and overbank area which need to convey a given design flood. The unknown in this problem is the width of the overbank needed such that the depth in the channel does not exceed a certain value. There are two given Manning’s n values for the channel and overbank area.

HINT: Separate the main channel and overbank areas into two rectangular cross-sections, and be careful when you compute the wetted perimeter, including only the parts of the channel and overbank that are wetted. - Beth Sciaudone - DTC Civil Water Resources & Envrionmental Instructor

Beth’s Solution to Civil WRE PM: NCEES Problem 510 - Geotechnical: Retaining Wall Stability
https://drtomsclassroom.com/free-civil-videos/


Civil Engineers - Activate Your Superpowers!
September 1-30 Get $100 Off Any Civil 20-Week Review
Use Discount Code: civilhero20W

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Available October 1

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September 18, 2019

Fish Friendly Hydro Power

A recent ASME article noted that in 2012 a Department of Energy study identified 54,000 Non-Powered Dams, dams with changes of elevation of 15 feet or higher, which could provide 13 gigawatts of power, enough to power 5 million homes. That potential is to say the least staggering.

The primary reason that these "small dams" are not being utilized is that typical small turbines are a hazard to fish. While there are strategies to keep fish out of these turbines, the methods are expensive, hard to maintain, and an unacceptable mortality is still present.

To address this challenge, the Natel Energy company has developed "fish-safe" turbines. They achieve the required safety to fish in a number of ways. One is to make the blades much thicker so that if a fish does come in contact the curvature of the blade matches the curvature of the fish's spine. Also, the blades have a forward slant so that if there is contact it is a glancing blow and not a direct hit. And because of their efficiency, they turn at slower speeds and once in the turbine the fish easily pass through safely.

Demand for power is ever increasing. Wonderful that there is a way to have power and fish. - Dr. Tom


Civil Engineers - Activate Your Superpowers!
September 1-30 Get $100 Off Any Civil 20-Week Review
Use Discount Code: civilhero20W

Mechanical Engineers - Change Is Here!
Available October 1

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September 16, 2019

FEATURED TESTIMONIAL - All the Hours Paid Off!

“I participated in the 20-Week Review class for the Civil: Water Resources and Environmental exam. All of the hours put into studying and developing the materials following the Dr. Tom method paid off as I passed the Exam. One of the critical items to my success was understanding the test taking method of taking multiple passes and not allowing myself to become to hung up on any one question. Taking the 20 weeks to absorb the material and develop organized references, I believe, was also critical to my success. I will recommend anyone taking the test in the future to use the Dr. Tom courses, they were worth both my monetary and time investments.”
- Chris Bakey, PE, Cochranville, PA


Civil Engineers - Activate Your Superpowers!
September 1-30 Get $100 Off Any Civil 20-Week Review
Use Discount Code: civilhero20W

Mechanical Engineers - Change Is Here!
Available October 1

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September 12, 2019

The Most Famous Crosswalk in the World

Crosswalks are intended to make crossing a road easier and safer for pedestrians. the world's most famous crosswalk, on Abbey Road, of Beatles' fame, just celebrated the 50th Anniversary of the photo that would make it a tourist destination. According to a CityLab article, this fame has turned a utilitarian and often-overlooked roadway feature into a would-be photo opportunity that is a source of frustration for local drivers. From Lombard Street in San Francisco to many locations along Route 66 to the Linn Cove Viaduct on the Blue Ridge Parkway, roadways fill the storage of cell phones and cameras for visitors to these locations, but the Abbey Road crosswalk leads the way for pedestrian crossing photos! - Daniel Findley, DTC Civil Transportation Instructor


Civil Engineers - Activate Your Superpowers!
September 1-30 Get $100 Off Any Civil 20-Week Review
Use Discount Code: civilhero20W

Mechanical Engineers - Change Is Here!
Available October 1

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September 10, 2019

Civil Engineers – Activate Your Superpowers. Save $100.


All you need to activate your super powers is a little help from Dr. Tom’s Classroom. Armed with the preparation, strategies and resources you get with DTC's Civil 20-Week PE Exam reviews, you can achieve the extraordinary. And now is the perfect time to start your PE Exam preparation with our 20-Week Reviews and save $100 with discount code, civilhero20W.

DTC’s targeted, structured review will help you focus your efforts and make the most of the ideal 20-week exam preparation window, all with the support of a team that is dedicated to your success. Let us help you triumph over the PE Exam.

“The most difficult part of preparing for the exam was knowing the precise scope of the morning exam subjects and identifying important concepts. In that respect, the extent of each subject presented in the Dr. Toms class, important conceptual explanations, examples that clearly understand the concepts, and especially the various challenges have given me a lot of self-confidence. Again, I would like to thank the Dr. Tom’s Class Team for helping me prepare for the exam.” - Nam Young Do, PE, Lotte E&C, South Korea

Civil Engineers - Activate Your Superpowers!
September 1-30 Get $100 Off Any Civil 20-Week Review
Use Discount Code: civilhero20W

Mechanical Engineers - Change Is Here!
Available October 1

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September 6, 2019

FEATURED FREE CIVIL VIDEO - Civil AM NCEES Problem 119 - Geotechnical: Retaining Wall Stability

Enjoy one of the most popular videos on the DTC YouTube Channel, wtih almost 10,000 views!

Problem 119 in the NCEES Civil AM Practice Exam is a classic Geotechnical question on gravity retaining wall stability, particularly overturning stability of the wall. It is critical that you are able to solve these types of classic retaining wall problems on the PE exam because you are almost certain to see them regardless of which discipline you select for the exam. This question will help you brush up on some basic geometry, statics, and will touch on very simple soil mechanics of lateral earth pressure, which is all you really need to know to solve retaining wall problems on the AM portion of the exam. However, you need to be efficient at solving these problems quickly even if it looks like they require several steps to get to the end result. Our instructional courses at Dr. Tom’s Classroom provide the most efficient way to get to the solution for common PE exam problems just like this one. Give this problem a try and watch the video to see if you understand all of the steps to get to the end result, good luck! - Mike Batten, PE - DTC Civil Geotechnical Instructor

Mike Batten’s Solution to Civil AM: NCEES Problem 119 - Geotechnical: Retaining Wall Stability: https://drtomsclassroom.com/free-civil-videos/


Civil Engineers - Activate Your Superpowers!
September 1-30 Get $100 Off Any Civil 20-Week Review
Use Discount Code: civilhero20W

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September 4, 2019

Rolling Bridge - Good Design Never Gets Old

An 18th century bridge design could be taking on a new life through London architect Thomas Randall-Page. His rolling bridge design is a low tech and elegant solution that requires no motors or electricity. I could try to describe how it works, but this animation from a curbed.com article tells all. For a mechanical engineer this is about as cool as a bridge gets. - Dr. Tom



Civil Engineers - Activate Your Superpowers!
September 1-30 Get $100 Off Any Civil 20-Week Review
Use Discount Code: civilhero20W

Mechanical Engineers - Change Is Here!
Available October 1

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September 2, 2019

FEATURED TESTIMONIAL - Beyond Helpful

“I didn’t finish college. Having history as a CAD drafter for architecture firms, I got a job at a small civil engineering firm in Florida. I stayed there 4 years, learning and growing into a design engineer before moving to California where I remained in the field for another ten years. However; without a degree, I never gave much thought to getting licensed. When I finally realized I needed licensure to move forward, self study for the EIT was brutal. I made it though, but realized I couldn’t do the same for the PE. Dr. Tom’s was very helpful in covering the broad ranges of the Civil AM and PM portion, especially helpful in areas that I had no experience in and, of course, no recent school. The notebook organization and material were beyond helpful in the test, I knew where all the information was and wasn’t, there was no frantic searching. It didn’t help with all the questions on the PE, I doubt anything could, but I passed my first try. So did my coworker that also took the class. Thank you very much for your class!”
Justin Blackwell, PE, San Diego, CA


Civil Engineers - Activate Your Superpowers!
September 1-30 Get $100 Off Any Civil 20-Week Review
Use Discount Code: civilhero20W

Mechanical Engineers - Change Is Here!
Available October 1

Dr. Tom's Classroom - Achieve the Extraordinary

September 1, 2019

Civil Engineers - Activate Your Superpowers. Save $100.


All you need to activate your super powers is a little help from Dr. Tom’s Classroom. Armed with the preparation, strategies and resources you get with DTC's Civil 20-Week PE Exam reviews, you can achieve the extraordinary. And now is the perfect time to start your PE Exam preparation with our 20-Week Reviews and save $100 with discount code, civilhero20W.

DTC’s targeted, structured review will help you focus your efforts and make the most of the ideal 20-week exam preparation window, all with the support of a team that is dedicated to your success. Let us help you triumph over the PE Exam.

“After reviewing other available material and courses, I realized that Dr. Tom’s 20-week PE Review Course is the right choice for me. I passed the Civil PE exam on my first try and I attribute this to Dr. Tom’s Classroom for providing the best schedule, study material, and strategies and also introducing a great team of instructors. I would highly recommend his classes to anyone who is planning on taking their PE exam.”  – Dadbeh Dowlatshahi, P.E., Houston, Texas

Civil Engineers - Activate Your Superpowers!
September 1-30 Get $100 Off Any Civil 20-Week Review
Use Discount Code: civilhero20W

Mechanical Engineers - Change Is Here!
Available October 1

Dr. Tom's Classroom - Achieve the Extraordinary