Ventilation Systems Mastery
Certification Exam (2026 Edition)||
questions and answers with
rationales/graded A+/2026
update/100% correct /instant
download
Total Questions: 80+
Time Allowed: 120 minutes
Passing Score: 75%
Format: Multiple Choice (Highlighted correct answer in bold with rationale)
Section A: Fundamentals of Ventilation (Questions 1–15)
1. According to ASHRAE Standard 62.1-2025, ventilation air is defined as:
• A) Air recirculated from occupied spaces
• B) Air from outdoors that has been filtered and conditioned
• C) Air exhausted from restrooms
• D) Air supplied from a nearby zone
Rationale: ASHRAE 62.1 specifies ventilation air as outdoor air intended to
maintain acceptable IAQ.
2. Which ventilation strategy is most effective for reducing airborne pathogen
transmission in classrooms (2026 CDC guidelines)?
• A) 100% recirculation with MERV-8 filters
• B) Dedicated Outdoor Air System (DOAS) with MERV-13 and UV-C
, • C) Natural ventilation only
• D) Exhaust fans only
Rationale: DOAS with enhanced filtration and UV-C provides consistent, clean
outdoor air and reduces recirculation of pathogens.
3. The minimum outdoor airflow rate per person in a typical office (ASHRAE
62.1-2025) is:
• A) 5 cfm/person
• B) 15 cfm/person
• C) 25 cfm/person
• D) 10 cfm/person
Rationale: Updated standard keeps 15 cfm/person for office spaces, but with
additional demand-controlled ventilation requirements.
4. What does ACH stand for in ventilation engineering?
• A) Air Changes per Hour
• B) Air Conditioning Heat
• C) Automatic Control Hub
• D) Absolute Carbon Humidity
5. A negative pressure room (e.g., airborne infection isolation) must have:
• A) More exhaust than supply
• B) More supply than exhaust
• C) Equal supply and exhaust
• D) Recirculation through HEPA only
Rationale: Negative pressure ensures contaminants do not escape to adjacent
areas.
6. Which sensor type is mandated by Title 24-2025 for demand-controlled
ventilation (DCV) in high-occupancy zones?
• A) Temperature sensor
, • B) CO₂ sensor
• C) Humidity sensor
• D) Pressure sensor
7. The primary purpose of a heat recovery ventilator (HRV) is to:
• A) Increase outdoor air temperature
• B) Decrease indoor humidity
• C) Transfer sensible heat between exhaust and supply air
• D) Filter volatile organic compounds
8. What is the recommended minimum outdoor air fraction during a severe wildfire
smoke event (AQI > 300) per EPA 2026 guidance?
• A) 100% outdoor air
• B) 50% outdoor air
• C) As low as possible (10–20%) with recirculation and MERV-13+
filtration
• D) No change
Rationale: To prevent smoke infiltration, reduce outdoor air intake and boost
recirculation with high-efficiency filters.
9. Which standard governs ventilation system testing and balancing in North
America?
• A) ISO 50001
• B) LEED v5
• C) NEBB Procedural Standards
• D) IECC 2024
10. The term “ventilation effectiveness” refers to:
• A) Fan energy efficiency
• B) How well supply air reaches the breathing zone
• C) Filter dust holding capacity
Certification Exam (2026 Edition)||
questions and answers with
rationales/graded A+/2026
update/100% correct /instant
download
Total Questions: 80+
Time Allowed: 120 minutes
Passing Score: 75%
Format: Multiple Choice (Highlighted correct answer in bold with rationale)
Section A: Fundamentals of Ventilation (Questions 1–15)
1. According to ASHRAE Standard 62.1-2025, ventilation air is defined as:
• A) Air recirculated from occupied spaces
• B) Air from outdoors that has been filtered and conditioned
• C) Air exhausted from restrooms
• D) Air supplied from a nearby zone
Rationale: ASHRAE 62.1 specifies ventilation air as outdoor air intended to
maintain acceptable IAQ.
2. Which ventilation strategy is most effective for reducing airborne pathogen
transmission in classrooms (2026 CDC guidelines)?
• A) 100% recirculation with MERV-8 filters
• B) Dedicated Outdoor Air System (DOAS) with MERV-13 and UV-C
, • C) Natural ventilation only
• D) Exhaust fans only
Rationale: DOAS with enhanced filtration and UV-C provides consistent, clean
outdoor air and reduces recirculation of pathogens.
3. The minimum outdoor airflow rate per person in a typical office (ASHRAE
62.1-2025) is:
• A) 5 cfm/person
• B) 15 cfm/person
• C) 25 cfm/person
• D) 10 cfm/person
Rationale: Updated standard keeps 15 cfm/person for office spaces, but with
additional demand-controlled ventilation requirements.
4. What does ACH stand for in ventilation engineering?
• A) Air Changes per Hour
• B) Air Conditioning Heat
• C) Automatic Control Hub
• D) Absolute Carbon Humidity
5. A negative pressure room (e.g., airborne infection isolation) must have:
• A) More exhaust than supply
• B) More supply than exhaust
• C) Equal supply and exhaust
• D) Recirculation through HEPA only
Rationale: Negative pressure ensures contaminants do not escape to adjacent
areas.
6. Which sensor type is mandated by Title 24-2025 for demand-controlled
ventilation (DCV) in high-occupancy zones?
• A) Temperature sensor
, • B) CO₂ sensor
• C) Humidity sensor
• D) Pressure sensor
7. The primary purpose of a heat recovery ventilator (HRV) is to:
• A) Increase outdoor air temperature
• B) Decrease indoor humidity
• C) Transfer sensible heat between exhaust and supply air
• D) Filter volatile organic compounds
8. What is the recommended minimum outdoor air fraction during a severe wildfire
smoke event (AQI > 300) per EPA 2026 guidance?
• A) 100% outdoor air
• B) 50% outdoor air
• C) As low as possible (10–20%) with recirculation and MERV-13+
filtration
• D) No change
Rationale: To prevent smoke infiltration, reduce outdoor air intake and boost
recirculation with high-efficiency filters.
9. Which standard governs ventilation system testing and balancing in North
America?
• A) ISO 50001
• B) LEED v5
• C) NEBB Procedural Standards
• D) IECC 2024
10. The term “ventilation effectiveness” refers to:
• A) Fan energy efficiency
• B) How well supply air reaches the breathing zone
• C) Filter dust holding capacity
