PE Thermal and Fluid Systems drill: Cooling/Heating Systems and Components
10 problems · Untimed · Worked solution after each answer
Shell-and-tube exchangers and feedwater heaters, cooling towers, vapor-compression and absorption refrigeration, heat pumps and thermal storage. Knowledge area 4 of the PE Mechanical: Thermal and Fluid Systems specification carries 12 to 18 of the 80 questions.
- 4A Heat Exchangers
- 4B Cooling Towers
- 4C Refrigeration Cycles and Heat Pumps

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).