MECHANICAL 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 […]
Paper a Roof to Save Cooling Energy
Northeastern University researchers have developed a new “paper” that, when applied to roofs, can dramatically reduce cooling loads. The paper is made of hydroxyapatite materials spun into fibers and made into a paper. Its white color reflects the majority of the direct rays from the sun. In addition, heat from inside the structure is radiated […]
DTC Is Going To Be at AHR Expo 2023
The DTC Team is heading to Atlanta in February, and we hope to see you there at our AHR Expo Booth (BC1613). We’ll be giving away free courses, and offering a 20% show discount on all our courses. So drop by, meet Dr. Tom, learn firsthand what makes our Mechanical PE Exam Review courses so […]
From Solar Waste to a Hot Opportunity
The proliferation of solar panels on roofs and in solar farms over the last 20 years is expected to create a new problem – what to do with the panels at the end of their lives? An estimated 8 million tons of waste per year is expected by 2030 and ten times that by 2050. […]
“DTC Is Worth Its Weight in Gold!”
At Dr. Tom’s Classroom, we have worked hard to make our courses the absolute best preparation for the Mechanical PE Exams. We strive keep our courses as affordable as possible. We know that purchasing a PE Exam prep course is major investment, and we want make sure that your investment pays off with a passing […]
Don’t Think About Bananas!
Well, maybe we should. Apparently a very serious disease, fusarium, or banana wilt, is already affecting a fourth of the world’s banana crop. This fungus travels under the ground, so spraying from above is not an option. A very promising strategy that is being developed between the International Atomic Energy Agency (IAEA) and scientists from several […]
Not a Cold Day on the Sand
The Finns have taken sand and turned it into an energy storage battery. Using insulated holding tanks that are 4 meters in diameter by 7 meters high filled with hundreds of tons of sand, the unit can store 8 MW-hours of heat, when the sand is heated to 500-600°C. The heat is used to keep […]
The Dr. Tom Method – The Perfect System to Pass the PE Exam
At Dr. Tom’s Classroom, we’ve worked hard to create the perfect system to help Mechanical engineers pass the PE Exam and become Professional Engineers. We even developed and launched a whole new Dr. Tom Method specifically targeted to the CBT exam format, and it’s been a huge success. With PE Exam Review courses for all […]
The Neal Armstrong Award of Excellence – A Night to Remember
No, I did not receive this award, but I had the next best experience – one of my former students did. As a teacher, the primary driving force behind everything I do is the knowledge that, in some small way, I am changing people’s lives. It is rare, however, to know just how much, or […]
FEATURED TESTIMONIAL – I took the HVAC & Refrigeration exam and I PASSED!!!!
“I took the HVAC & Refrigeration exam and I PASSED!!!! Your step-by-step course really did make all the difference! This was my third attempt at taking this thing. The first time I took an in-person study course, a lot of theory, not great with the problem practice. The second time I tried to study on […]
