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 […]
Sports Trend – The Venue over the Game?
Sports stadiums typically started off as purely static structures, falling mostly under civil engineering. They were interesting structures, but the game being played was clearly the center of attention. However, today we have stadiums that are anything but static. Moving roofs, moving fields, moving stands, a very visible world of mechanical engineers and civil engineers […]
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. […]
FEATURED TESTIMONIAL – “I was able to pass the HVAC PE Exam because of the DTC.”
“After a couple of failed attempts at the HVAC PE Exam. I decided to find a different method of studying and purchased the DTC HVAC Test Drive module to see if the lectures, presentations, and problems would work for me. I was very impressed with the quality of the program and completed all the modules […]
Death Marks Time in Prague
The astronomical clock in Prague is the oldest still in operation (first installed in 1410). The impressive clock has three main mechanical components — the astronomical dial, the calendar dial, and an hourly display of figures and sculptures. The astronomical portion shows the position of the Sun and Moon and the calendar dial shows the months of […]
“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 […]
FEATURED TESTIMONIAL – 5-Star Google Reviews for DTC
We opened up our Google Reviews recently, and we’re proud to share our first Google Reviews, all are 5 Stars! Mechanical PE Exam Prep That WorksTest Drive Your Course for Only $50! Dr. Tom’s Classroom – Your the Extraordinary
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 […]
