FREE HVAC Installation and Repair Questions and Answers 2026
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- The EPA Section 608 Universal certification test has 100 questions: 25 Core plus 25 each from Type I, Type II and Type III. (ecfr.gov)
- The passing score for the closed-book EPA Section 608 Type I, Type II, Type III and Universal tests is 70 percent, and mail-in Type I tests need 84 percent. (ecfr.gov)
- EPA Section 608 Technician Certification credentials do not expire. (U.S. Environmental Protection Agency)
- EPA Section 608 certification has no recertification requirement today, though EPA can add one later by publishing a notice in the Federal Register. (ecfr.gov)
- EPA Section 608 Type II, Type III and Universal certification requires a closed-book, proctored test taken in a secure environment through an EPA-approved certifying program. (ecfr.gov)
- Technicians who maintain, service, repair or dispose of equipment that could release refrigerants must hold EPA Section 608 certification, while closely supervised apprentices are exempt. (U.S. Environmental Protection Agency)
- EPA-approved Section 608 certifying programs must give candidates their test results no later than 30 days after the test date. (ecfr.gov)
Facts verified Oct 20, 2026 against U.S. Environmental Protection Agency. Dates that have passed are removed automatically.
HVAC Exam at a Glance
| Item | Detail | Official source |
|---|---|---|
| Number of questions (Universal) | 100 questions | ecfr.gov |
| Passing score | 70% (closed-book); 84% for mail-in Type I | ecfr.gov |
| Validity | Does not expire | U.S. Environmental Protection Agency |
| Renewal | No recertification currently required | ecfr.gov |
| Delivery | Closed-book, proctored test through an EPA-approved certifying program (mail-in allowed for Type I only) | ecfr.gov |
| Eligibility | Required for technicians who service or dispose of refrigerant-containing equipment; supervised apprentices exempt | U.S. Environmental Protection Agency |
| Score release | Within 30 days of the test | ecfr.gov |
Facts verified Oct 20, 2026 against U.S. Environmental Protection Agency. Dates that have passed are removed automatically.
Sample HVAC - Heating, Ventilation, and Air Conditioning Practice Questions
Try these questions from our free HVAC - Heating, Ventilation, and Air Conditioning practice tests. The correct answer and an explanation follow each question. Practice with the free HVAC - Heating, Ventilation, and Air Conditioning practice test on PracticeTestGeeks (450+ questions with answer explanations).
What type of control system is most common in residential HVAC versus commercial HVAC?
- A. Residential: BAS with DDC controllers; Commercial: simple thermostats
- B. Residential: Simple thermostats; Commercial: Building Automation Systems (BAS) with DDC controls
- C. Both use simple thermostats equally
- D. Both use BAS systems regardless of building size
Answer: B. Residential: Simple thermostats; Commercial: Building Automation Systems (BAS) with DDC controls
Residential HVAC relies on simple programmable or smart thermostats with on/off or basic two-stage control. Commercial HVAC typically uses full Building Automation Systems with DDC controllers, VAV boxes, sensors, and centralized monitoring/control.
A supermarket HVAC system presents unique challenges compared to standard commercial HVAC primarily due to:
- A. Higher ceilings requiring more airflow
- B. Open refrigerated cases that significantly increase the cooling and dehumidification load
- C. Stricter fire suppression integration requirements
- D. Higher lighting power density than office buildings
Answer: B. Open refrigerated cases that significantly increase the cooling and dehumidification load
Open refrigerated display cases release cold air and moisture into the store continuously, dramatically increasing the sensible and latent cooling loads.
Compared to commercial systems, residential HVAC systems typically have:
- A. More complex control sequences
- B. Simpler on/off or two-stage controls with a single thermostat
- C. Higher static pressure requirements
- D. More redundancy built into the design
Answer: B. Simpler on/off or two-stage controls with a single thermostat
Residential systems use simple thermostats with single-stage or two-stage control, whereas commercial systems use complex DDC sequences for multi-zone management.
What is the purpose of 'commissioning' (Cx) in commercial HVAC, and what does it verify?
- A. Installing HVAC equipment according to manufacturer instructions
- B. A systematic quality assurance process verifying that all HVAC systems are installed, programmed, and operating as specified by the design
- C. A regulatory inspection required by state HVAC boards
- D. Testing refrigerant charge after installation
Answer: B. A systematic quality assurance process verifying that all HVAC systems are installed, programmed, and operating as specified by the design
Commissioning is a quality assurance process that systematically verifies and documents that HVAC systems are designed, installed, and operating according to the Owner's Project Requirements (OPR) and design documents. It includes functional testing, control sequence verification, and performance testing.
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Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy