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 […]
“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 […]
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 […]
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 […]
Attention HVAC Engineers! DTC Has the Best Course for PE Exam Prep
WATCH OUR VIDEO! If you’re looking for your best chance to pass the HVAC & Refrigeration Mechanical PE Exam, Dr. Tom’s Classroom offers a comprehensive online prep course for the HVAC & Refrigeration PE Exam, specifically developed for the CBT format exam. Our HVAC course applies the successful Dr. Tom Method for CBT to the […]
Ice Cream or Dinner?
When I was growing up, there were two sounds I could not ignore, but I was always torn between which one to pursue. One was my parents calling me to dinner and the other was the sound of the ice cream truck. I had strict parents, so I had only one real choice. As could […]
A Cold Blast from the Past: Beijing Olympics Cooled by Natural Refrigerants
Since the 1980’s scientists have been concerned about the effects refrigerants have on the environment. R-11 and R-12 are wonderful refrigerants that provide for efficient cooling systems, but they destroy ozone in the upper atmosphere. With the Montreal Protocols, their use in refrigeration systems have been banned. R-22 and later R-134a were used as substitutes. […]
Job Hunting Tips in the Great Resignation
With an unprecedented surge in the number of people quitting their jobs, the current employment environment is being called “The Great Resignation.” The Washington Post noted that this could be “the most worker-friendly climate in decades with workers having the ability to sort through near-record levels of job postings, and many employers hungry to hire.” In […]
Attention HVAC Engineers!
WATCH OUR VIDEO! Dr. Tom’s Classroom now offers an HVAC & Refrigeration PE Exam Review, specifically developed for the CBT format exam. It had long been a goal at DTC to add an HVAC course to our line up. After completing our new Machine Design & Materials and Thermal & Fluid Systems Reviews for the […]
FEATURED TESTIMONIAL – “Amazing Course. I LOVE the Format”
“I passed on the first try! Dr. Tom’s method prepared me very well for the exam. I LOVE the format and the videos – well-put-together lectures with clear presentation, in depth explanations and clear understanding of the topics taught. I enjoyed watching and learning these topics. I have my binders full of course material for […]
