Real ASHRAE HFDP practice exam questions for easy pass!
Last Updated: Jun 26, 2026
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1. According to the most current edition of ASHRAE Standard 170, which of the following is the correct number of air changes per hour for a treatment room?
A) 6
B) 12
C) 4
D) 2
2. Which of the following causes a higher horsepower to cfm (L/s) ratio?
A) Higher number of branch ducts
B) Higher summer building cooling load
C) Higher static pressure drop in ductwork
D) Higher winter building heating load
3. Compliance with the ASHRAE Standard 90.1 mandatory provisions for Heating, Ventilating, and Air Conditioning can be achieved using the energy cost budget method or:
A) Energy modeling
B) The prescriptive method
C) Simplified approach
D) The building trade-off option
4. Which of the following standards requires a machinery room when the maximum amount of refrigerant per the standard is exceeded?
A) ASHRAE Standard 15
B) ASHRAE Standard 170
C) ASHRAE Standard 34
D) ASHRAE Standard 62.1
5. Airborne Infection Isolation Rooms are designed to:
A) Protect staff and visitors from infection
B) Be switched from neutral to negative
C) Protect patients from infection
D) Be switched from neutral to positive
Solutions:
| Question # 1 Answer: A | Question # 2 Answer: C | Question # 3 Answer: B | Question # 4 Answer: A | Question # 5 Answer: A |
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