NCCER HVAC Level 1 Certification Exam
Newest 2026 Updated Practice Exam |
100 Most Tested Questions Collection &
Verified Detailed Answers | Tutor
Verified Success Exam) Graded A+
1. What is the primary function of an HVAC system?
A. Generate electricity
B. Control indoor temperature and air quality
C. Provide plumbing services
D. Supply natural gas
Answer: B ✔
The primary purpose of HVAC is to regulate temperature, humidity, and air
quality for occupant comfort and safety.
2. Which safety organization sets workplace safety standards in the United
States?
A. EPA
B. OSHA
C. NEC
D. ASHRAE
Answer: B ✔
The Occupational Safety and Health Administration (OSHA) establishes and
enforces workplace safety regulations.
3. What does PPE stand for?
A. Personal Power Equipment
, B. Protective Power Equipment
C. Personal Protective Equipment
D. Professional Protection Equipment
Answer: C ✔
PPE refers to Personal Protective Equipment such as gloves, goggles, and
helmets used for worker safety.
4. Which tool is used to measure voltage?
A. Thermometer
B. Ammeter
C. Voltmeter
D. Manometer
Answer: C ✔
A voltmeter measures electrical potential difference, a key diagnostic in HVAC
systems.
5. What type of current is typically used in residential HVAC systems?
A. Direct current
B. Alternating current
C. Static current
D. Pulsating current
Answer: B ✔
Most residential systems use Alternating Current (AC) due to its efficient
transmission over distances.
6. What is the boiling point of water at sea level?
A. 100°F
B. 180°F
C. 212°F
D. 32°F
, Answer: C ✔
Water boils at 212°F (100°C) under standard atmospheric pressure, important in
heat transfer concepts.
7. Which law relates voltage, current, and resistance?
A. Boyle’s Law
B. Ohm’s Law
C. Charles’s Law
D. Dalton’s Law
Answer: B ✔
*
𝑉 = 𝐼𝑅
𝑉𝑠
V
𝑅
Ω
𝑉𝑠 12.0 V
𝐼= = = 2.00 A
𝑅 6.0 Ω
Vs = 12.0 V+-R = 6.0 ΩI = 2.00 A
Ohm’s Law defines the relationship between voltage (V), current (I), and
resistance (R).
8. What is the unit of electrical resistance?
A. Volt
B. Ampere
C. Ohm
D. Watt
Answer: C ✔
Resistance is measured in ohms, indicating opposition to current flow.
Newest 2026 Updated Practice Exam |
100 Most Tested Questions Collection &
Verified Detailed Answers | Tutor
Verified Success Exam) Graded A+
1. What is the primary function of an HVAC system?
A. Generate electricity
B. Control indoor temperature and air quality
C. Provide plumbing services
D. Supply natural gas
Answer: B ✔
The primary purpose of HVAC is to regulate temperature, humidity, and air
quality for occupant comfort and safety.
2. Which safety organization sets workplace safety standards in the United
States?
A. EPA
B. OSHA
C. NEC
D. ASHRAE
Answer: B ✔
The Occupational Safety and Health Administration (OSHA) establishes and
enforces workplace safety regulations.
3. What does PPE stand for?
A. Personal Power Equipment
, B. Protective Power Equipment
C. Personal Protective Equipment
D. Professional Protection Equipment
Answer: C ✔
PPE refers to Personal Protective Equipment such as gloves, goggles, and
helmets used for worker safety.
4. Which tool is used to measure voltage?
A. Thermometer
B. Ammeter
C. Voltmeter
D. Manometer
Answer: C ✔
A voltmeter measures electrical potential difference, a key diagnostic in HVAC
systems.
5. What type of current is typically used in residential HVAC systems?
A. Direct current
B. Alternating current
C. Static current
D. Pulsating current
Answer: B ✔
Most residential systems use Alternating Current (AC) due to its efficient
transmission over distances.
6. What is the boiling point of water at sea level?
A. 100°F
B. 180°F
C. 212°F
D. 32°F
, Answer: C ✔
Water boils at 212°F (100°C) under standard atmospheric pressure, important in
heat transfer concepts.
7. Which law relates voltage, current, and resistance?
A. Boyle’s Law
B. Ohm’s Law
C. Charles’s Law
D. Dalton’s Law
Answer: B ✔
*
𝑉 = 𝐼𝑅
𝑉𝑠
V
𝑅
Ω
𝑉𝑠 12.0 V
𝐼= = = 2.00 A
𝑅 6.0 Ω
Vs = 12.0 V+-R = 6.0 ΩI = 2.00 A
Ohm’s Law defines the relationship between voltage (V), current (I), and
resistance (R).
8. What is the unit of electrical resistance?
A. Volt
B. Ampere
C. Ohm
D. Watt
Answer: C ✔
Resistance is measured in ohms, indicating opposition to current flow.
