PE Mechanical Engineering Exam - HVAC and Refrigeration Practice Test
NCEES Professional Engineering exam for Mechanical Engineering - HVAC and Refrigeration specialty covering thermodynamics, heat transfer, and HVAC systems. Administered by NCEES. Key domains include Energy Efficiency, Fluid Mechanics, Heat Transfer and HVAC Systems Design.
Sample Questions
Try a few questions to see what the full exam is like.
30 of 148 answers carry a checkable reference.
A clean fan-curve region is documented for a classroom AHU fan at 780 rpm, 13,200 cfm, and 9.6 brake hp. The drive is changed to 910 rpm with the same system and air density. What flow and brake horsepower should be expected?
A DOAS serving a New Orleans archive suite brings in 980 cfm of outdoor air. At design, outdoor air is 40.5 Btu/lb dry air and the return state is 28.8 Btu/lb dry air. A nearby exhaust fan is outside the airstream. What total cooling capacity is required at the outdoor-air coil?
A clean fan-curve region is documented for a garage fan at 690 rpm, 18,400 cfm, and 11.5 brake hp. The drive is changed to 805 rpm with the same system and air density. What flow and brake horsepower should be expected?
A pharmaceutical gowning suite must raise supply-air humidity ratio from 0.0028 to 0.0066 lb water/lb dry air at 2,800 cfm. The preheat coil is upstream and its sensible load is handled separately. What steam humidification rate is required?
A training room zone is evaluated with the ventilation rate procedure. The final plan has 55 occupants and 1,600 ft2. Use Rp = 5 cfm/person and Ra = 0.06 cfm/ft2. Diversity and system ventilation efficiency will be handled later. What breathing-zone outdoor airflow is required?
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Why This Certification Opens Doors
HVAC&R engineering directly impacts public health, safety, and welfare. Licensed PEs design systems that ensure indoor air quality, prevent the spread of pathogens, maintain critical environments for hospitals and data centers, and safely handle refrigerants. Their work governs energy efficiency on a massive scale, affecting building operating costs and environmental sustainability. The PE license is a legal and ethical benchmark, signifying an engineer's capability to protect the public through sound, responsible design and practice.