Heating Systems Installation &
Certification Systems (2026 Edition)|||
questions and answers with
rationales/graded A+/2026
update/100% correct /instant
download
Course: HVAC/R Installation & Certification
Total Questions: 85
Time Allowed: 2.5 hours
Passing Score: 70%
References: IMC 2026, NEC 2026, EPA Section 608 (2026 Updates), ACCA
Manuals, NATE 2026 Core, and BPI Standards.
Part 1: Fundamentals of Heating Systems (Questions 1–20)
1. Which heating system uses water as the heat transfer medium circulated through
radiators or radiant tubing?
• A) Warm air furnace
• B) Hydronic heating system (Rationale: Hydronic systems circulate
hot water or steam; forced air uses air.)
• C) Electric resistance baseboard
• D) Heat pump
2. The minimum combustion efficiency requirement for a new residential gas
furnace installed in 2026 under federal law is:
, • A) 92% AFUE *(Rationale: DOE 2026 standard raised minimum AFUE
to 92% for non-weatherized gas furnaces.)*
• B) 80% AFUE
• C) 95% AFUE
• D) 78% AFUE
3. A condensing gas furnace achieves higher efficiency by:
• A) Increasing burner flame temperature
• B) Extracting latent heat from flue gases (Rationale: Secondary heat
exchanger condenses water vapor, releasing latent heat.)
• C) Using a larger blower motor
• D) Reducing airflow
4. In a forced-air system, the component that controls temperature cycling is the:
• A) Limit switch
• B) Thermostat (Rationale: Thermostat signals call for heat; limit
switch is safety.)
• C) Gas valve
• D) Transformer
5. Which heating system is most commonly paired with an air-to-air heat pump as
a backup in cold climates?
• A) Electric baseboard
• B) Gas furnace (dual fuel) (Rationale: Dual fuel systems switch to gas
furnace below balance point.)
• C) Oil-fired boiler
• D) Radiant ceiling panels
6. The maximum allowable temperature drop across a hydronic boiler under
normal operation (IMC 2026) is:
• A) 10°F
, • B) 20°F *(Rationale: Standard ΔT of 20°F for finned-tube baseboard;
2026 IMC retains this.)*
• C) 30°F
• D) 40°F
7. Which certification is mandatory for technicians handling refrigerants in heat
pumps?
• A) NATE
• B) EPA Section 608 (Rationale: Federal law requires EPA 608 for
refrigerant handling; 2026 updates include lower GWP refrigerants.)
• C) BPI
• D) RETA
8. The component that prevents boiler from firing if water flow is insufficient is a:
• A) Flow switch (Rationale: Protects against overheating/no flow
condition.)
• B) Pressure relief valve
• C) Aquastat
• D) Circulator pump
9. According to NEC 2026, a dedicated branch circuit for a fixed electric furnace
must be sized at least:
• A) 125% of full-load amperage (Rationale: NEC Article 424 –
continuous load rule.)
• B) 100% of full-load amperage
• C) 150% of full-load amperage
• D) 80% of full-load amperage
10. Which heating system emits the least direct CO₂ per BTU at the point of use
(assuming grid average electricity in 2026)?
• A) Oil furnace
Certification Systems (2026 Edition)|||
questions and answers with
rationales/graded A+/2026
update/100% correct /instant
download
Course: HVAC/R Installation & Certification
Total Questions: 85
Time Allowed: 2.5 hours
Passing Score: 70%
References: IMC 2026, NEC 2026, EPA Section 608 (2026 Updates), ACCA
Manuals, NATE 2026 Core, and BPI Standards.
Part 1: Fundamentals of Heating Systems (Questions 1–20)
1. Which heating system uses water as the heat transfer medium circulated through
radiators or radiant tubing?
• A) Warm air furnace
• B) Hydronic heating system (Rationale: Hydronic systems circulate
hot water or steam; forced air uses air.)
• C) Electric resistance baseboard
• D) Heat pump
2. The minimum combustion efficiency requirement for a new residential gas
furnace installed in 2026 under federal law is:
, • A) 92% AFUE *(Rationale: DOE 2026 standard raised minimum AFUE
to 92% for non-weatherized gas furnaces.)*
• B) 80% AFUE
• C) 95% AFUE
• D) 78% AFUE
3. A condensing gas furnace achieves higher efficiency by:
• A) Increasing burner flame temperature
• B) Extracting latent heat from flue gases (Rationale: Secondary heat
exchanger condenses water vapor, releasing latent heat.)
• C) Using a larger blower motor
• D) Reducing airflow
4. In a forced-air system, the component that controls temperature cycling is the:
• A) Limit switch
• B) Thermostat (Rationale: Thermostat signals call for heat; limit
switch is safety.)
• C) Gas valve
• D) Transformer
5. Which heating system is most commonly paired with an air-to-air heat pump as
a backup in cold climates?
• A) Electric baseboard
• B) Gas furnace (dual fuel) (Rationale: Dual fuel systems switch to gas
furnace below balance point.)
• C) Oil-fired boiler
• D) Radiant ceiling panels
6. The maximum allowable temperature drop across a hydronic boiler under
normal operation (IMC 2026) is:
• A) 10°F
, • B) 20°F *(Rationale: Standard ΔT of 20°F for finned-tube baseboard;
2026 IMC retains this.)*
• C) 30°F
• D) 40°F
7. Which certification is mandatory for technicians handling refrigerants in heat
pumps?
• A) NATE
• B) EPA Section 608 (Rationale: Federal law requires EPA 608 for
refrigerant handling; 2026 updates include lower GWP refrigerants.)
• C) BPI
• D) RETA
8. The component that prevents boiler from firing if water flow is insufficient is a:
• A) Flow switch (Rationale: Protects against overheating/no flow
condition.)
• B) Pressure relief valve
• C) Aquastat
• D) Circulator pump
9. According to NEC 2026, a dedicated branch circuit for a fixed electric furnace
must be sized at least:
• A) 125% of full-load amperage (Rationale: NEC Article 424 –
continuous load rule.)
• B) 100% of full-load amperage
• C) 150% of full-load amperage
• D) 80% of full-load amperage
10. Which heating system emits the least direct CO₂ per BTU at the point of use
(assuming grid average electricity in 2026)?
• A) Oil furnace
