PE HVAC and Refrigeration drill: HVAC Loads and Psychrometrics
10 problems · Untimed · Worked solution after each answer
Heating and cooling loads, sensible and latent processes, mixing, humidification and dehumidification at sea level, 5,000 ft and low temperature. Knowledge area 1 of the PE Mechanical: HVAC and Refrigeration specification carries 18 to 27 of the 80 questions.
- 1A Heating/Cooling Loads
- 1B Heating/Cooling Processes
- 1C Humidification/Dehumidification Processes

Before you start
- Every problem has four options and one correct answer. Every value you need is in the problem, so you can work it with a calculator; the worked solution shows each step and names the mistake behind the most tempting wrong answer.
- Check each answer to see the explanation before moving on. Checked answers cannot be changed.
Create a free account before you start
Create a free account to start. Every drill includes one free attempt. A PE Mechanical pass unlocks every full timed practice exam and unlimited drills for all three PE Mechanical exams.
Original practice problems written to the published NCEES exam specifications. Independent preparation, not affiliated with or endorsed by the National Council of Examiners for Engineering and Surveying (NCEES).