International Women In Engineering Day
Hedy Lamarr is often remembered for her roles in classic Hollywood films. But did you know – she was a brilliant innovator, who leveraged her knowledge of radio systems to devise a frequency-hopping communication system that enhances the reliability, security, and efficiency of wireless communication? It went on to be a crucial foundation for modern […]
To Turn Up the Heat in Denver Just Flush?
In the 1800’s, Denver set up a state-of-the-art heating system for downtown buildings, using a central steam boiler to supply heat. But this ageing system needs repairs, and the city is trying to reduce carbon emissions from the now natural gas fired boilers. So, Denver is spending $300 million to connect eleven city buildings to […]
With DTC, Perseverance Can Pay Off!
While there are plenty of people who pass the PE Exam on the first try, there are quite a few who don’t. We have lots of folks who come to DTC after trying to study on their own or taking review courses from other sources, and we have helped many of them pass on their […]
A Graduation Gift Suggestion
To those receiving their mechanical engineering degree – congratulations! You have worked hard and are eager to get started on your career. Many of you already have a job lined up, however many of you do not, but that is ok. At this point, your grade point average is most important, though many have various […]
FEATURED TESTIMONIAL – “Great Course That Keeps You Engaged”
“I took Dr. Tom’s thermal/fluids PE prep course. Dr. Tom presents the prep course material personally. Starting from the first lesson, it’s obvious that Dr. Tom is a man that is extremely passionate about teaching. If you are serious about taking a PE and not wasting your time, I would recommend Dr. Tom’s Classroom. I […]
A “Cheddar” Way of Saving Energy for a Cheese Manufacturer
Barbers, a cheesemaker in the UK installed a milk-source heat pump on the process and is now saving £70,000 (about $94,000) in electrical costs per year. The system recovers the heat removed when cooling the raw milk from a cow’s body temperature to 40°F (5°C) for storage until the next step. Unlike a plain heat […]
“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 to keep our courses as affordable as possible. We know that purchasing a PE Exam prep course is a major investment, and we want to make sure that your investment pays off […]
Heat Islands not Just a City Thing
We’ve all heard about the heat island effect around large cities. Concrete, buildings, and asphalt absorb solar radiation and then re-emit it to the air. It makes cities a few degrees warmer, particularly on sunny days. But the same effect happens around data centers too. Data centers often draw hundreds of megawatts of electricity, and […]
FEATURED TESTIMONIAL – “Dr. Tom Does a Sterling Job”
“If it wasn’t for Dr Tom’s encouraging and clarifying teaching style, I doubt I’d ever have the courage take on the Thermal and Fluids Systems PE exam. In fact, Thermodynamics and Heat Transfer were the areas in which I was struggling the most in college, some twenty years ago. Dr Tom’s course made these ‘difficult’ […]
Making Heat Pumps Better with a Common Ingredient
Heat pumps are a great way to use the power (and heat) of thermodynamics to move heat from a cold space to a hot space. Their Coefficient of Performance (COP) makes them a better option than fossil fuels in some climates. Renewable energy like solar, can also reduce the carbon footprint. However, the biggest problem […]
