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PDHengineer.com Welcome to PDHengineer! Since 2003, we've awarded over 400,000 hours of PDH credits, providing top-notch online education for engineers.

Explore our courses and webinars to advance your career. Learn more at www.pdhengineer.com!

Collapse of the Willow Island Cooling TowerThe 1978 Willow Island Cooling Tower collapse remains the deadliest construct...
05/30/2025

Collapse of the Willow Island Cooling Tower

The 1978 Willow Island Cooling Tower collapse remains the deadliest construction accident in U.S. history—caused by a perfect storm of rushed work, weak concrete, missing bolts, and zero oversight. How did it all go so tragically wrong?

Click the link in the comments to read the full story and lessons learned.

The London Bridge Has Never Fallen Down (But it Has Been Rebuilt Many Times)Think London Bridge has fallen down? Think a...
05/27/2025

The London Bridge Has Never Fallen Down
(But it Has Been Rebuilt Many Times)

Think London Bridge has fallen down? Think again. Despite the nursery rhyme, it never has—but it has been rebuilt many times over 2,000 years. From Roman pontoons to a transplanted version in Arizona, this iconic crossing has quite the story.

Click the link in the comments to uncover the surprising history behind one of the world’s most misunderstood bridges.


The May Ethical Dilemma: Soliciting WorkAn engineer helps a city on a major project while working for a firm… then start...
05/20/2025

The May Ethical Dilemma: Soliciting Work

An engineer helps a city on a major project while working for a firm… then starts his own company and later goes after that same city as a client. No non-compete in place.

Is it fair game—or a breach of professional ethics?

Read the full case and see how your peers and the NSPE Board of Ethical Review ruled.

Link in the comments!

America's Largest Maritime DisasterOne of the deadliest maritime disasters in U.S. history—and you’ve probably never hea...
05/19/2025

America's Largest Maritime Disaster

One of the deadliest maritime disasters in U.S. history—and you’ve probably never heard of it. Just days after Lincoln’s assassination, over 1,700 lives were lost in the fiery explosion of the Sultana steamboat. What went wrong? A combination of poor engineering, overlooked boiler design, and unethical decisions.

Learn how a new boiler technology, rushed oversight, and corrupt choices led to catastrophe.

Link in the comments to take the course.

Riddle Me This: King Arthur’s Coin GameYou are with King Arthur at his perfectly round table. You each have a huge pile ...
05/14/2025

Riddle Me This: King Arthur’s Coin Game

You are with King Arthur at his perfectly round table. You each have a huge pile of gold coins and have agreed to play a game. The winner gets to keep all of the gold. The rules are as follows: each player will in turn place a coin on the table. The coin must lay flat, it cannot overlap any other coins, and it cannot hang off the edge of the table. The first player unable to successfully place a coin loses.

King Arthur thinks he’s really good at this game and has decided to let you go first. What strategy can you come up with the guarantee that you win?


05/13/2025

Make Mom proud! Ace this month’s quiz and give your mother the best gift: your success. Take the challenge and show her what you’re made of.

Question 1: The acronym "PLC" stands for ___________ in control systems.

1. Pressure limiting controller
2. Programmable logic controller
3. Pneumatic level controller
4. Process logic computer

(Click the link in the Comments to start the 6-question quiz!)

No Flowers Needed—Celebrate Growth with PDHengineer This Mother’s Day!This May, we’re honoring the dedication, strength,...
05/11/2025

No Flowers Needed—Celebrate Growth with PDHengineer This Mother’s Day!

This May, we’re honoring the dedication, strength, and brilliance of moms in engineering—and all professionals who keep learning and growing. Whether you're a mom, have one, or just want to honor the nurturing spirit of growth, PDHengineer is here to support your journey with expert-approved continuing education.

Skip the chocolates—treat yourself (or a fellow engineer) to career development that lasts longer than a bouquet.

’sDay

Happy Mother’s Day from PDHengineer! Today, we’re celebrating the strength, ingenuity, and unwavering support of the ama...
05/11/2025

Happy Mother’s Day from PDHengineer!
Today, we’re celebrating the strength, ingenuity, and unwavering support of the amazing moms who help build the world—both at home and in the workplace.

Whether you're raising future problem-solvers, managing chaos like a seasoned project manager, or juggling work and life with grace, we see you—and we salute you.

Here’s to the moms who inspire, innovate, and engineer a better tomorrow. From all of us at PDHengineer, thank you for everything you do!

’sDay

Use Discount Code Y2149 on PDHengineer.com for savings on individual courses and webinars! - Valid for new purchases thr...
05/11/2025

Use Discount Code Y2149 on PDHengineer.com for savings on individual courses and webinars!

- Valid for new purchases through 05/31/2025
- Applies to individual courses and webinars
- Excludes Build Your Own Packages, State Renewal Packages, and webinar site licenses, which are already discounted

Upgrade your skills while saving—don't miss out!

The “Big Dig” Tunnel CollapseA 26-ton ceiling collapse in Boston’s “Big Dig” tunnel killed one and exposed serious engin...
05/09/2025

The “Big Dig” Tunnel Collapse

A 26-ton ceiling collapse in Boston’s “Big Dig” tunnel killed one and exposed serious engineering oversights. What went wrong—and why did no one act on the warning signs?

Click the link in the comments to dive into this real-world engineering failure and what we can learn from it.

Riddle Me This: The Hidden PasswordYou have been tasked with discovering the hidden password to a computer. The password...
05/06/2025

Riddle Me This: The Hidden Password

You have been tasked with discovering the hidden password to a computer. The password is a single word. Luckily, the owner of the computer had just eaten chocolate before using it, so marks have been left on the keys. The password is 7 letters long and can also work backwards. What is the password?

Digitally Signing and Sealing Your PlansAre you up to date on your state's rules for digitally signing and sealing engin...
05/06/2025

Digitally Signing and Sealing Your Plans

Are you up to date on your state's rules for digitally signing and sealing engineering documents? With evolving tech, it's more important than ever to understand the difference between digital and electronic signatures—and what your state board expects. Click the link in the comments to dive into the details and keep your seals compliant and professional.

(Click the link in the Comments to continue reading the full article)

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