NEW JERSEY HVAC LICENSE EXAM – QUESTIONS AND ANSWERS | VERIFIED AND
WELL DETAILED ANSWERS | PLUS RATIONALES | GUARANTEED PASS | LATEST
EXAM UPDATE
*Core Domains*
*HVACR Theory and Fundamentals*
*New Jersey State Codes and Laws*
*Refrigerant Handling and EPA*
*Hydronic Systems and Steam Heat*
*Electrical Systems and Controls*
*Ventilation and Air Distribution*
*Fuel Gas Piping and Combustion*
*Safety and Professional Ethics*
*Introduction*
*The New Jersey HVAC License Exam is a comprehensive assessment designed to eval
SECTION ONE: QUESTIONS 1–100
, 1. Which of the following is the primary purpose of a P-trap in a condensate drain
line?
A. To increase the velocity of the water flow
B. To prevent sewer gases or conditioned air from escaping/entering
C. To collect sediment before it reaches the main drain
D. To provide a point for manual Priming
🟢 B. To prevent sewer gases or conditioned air from escaping/entering
🔴 Explanation: A P-trap creates a water seal that prevents air or sewer gases from
moving through the pipe while allowing condensate to flow out, maintaining system
pressure and hygiene.
2. In a residential split system, which component is responsible for rejecting heat from
the refrigerant?
A. Evaporator coil
B. Metering device
C. Condenser coil
D. Accumulator
🟢 C. Condenser coil
,🔴 Explanation: The condenser coil is located in the outdoor unit where the high-
pressure, high-temperature gas releases heat to the outside air and condenses into a
liquid.
3. According to the New Jersey Mechanical Code, what is the minimum clearance for a
mechanical appliance from a property line?
A. 2 feet
B. 5 feet
C. 10 feet
D. 0 feet, as long as it is shielded
🟢 C. 10 feet
🔴 Explanation: Standard mechanical codes often specify a 10-foot clearance from
property lines for intake and exhaust openings to prevent nuisance and ensure safety.
4. A technician measures a temperature split of 30°F across an evaporator coil. This
likely indicates:
A. Low airflow
B. Refrigerant overcharge
, C. High return air humidity
D. A dirty condenser coil
🟢 A. Low airflow
🔴 Explanation: A high temperature split (typically above 20°F in cooling) usually
indicates that air is moving too slowly across the coil, allowing it to cool down
significantly more than intended.
5. What is the latent heat of fusion for water at atmospheric pressure?
A. 970 BTUs per pound
B. 144 BTUs per pound
C. 1,200 BTUs per pound
D. 1 BTU per pound
🟢 B. 144 BTUs per pound
🔴 Explanation: The latent heat of fusion is the amount of energy required to change one
pound of ice to one pound of water (or vice versa) at 32°F without changing the
temperature.
6. Which electrical meter setting is used to check for a "blown" fuse while it is removed
from the circuit?
WELL DETAILED ANSWERS | PLUS RATIONALES | GUARANTEED PASS | LATEST
EXAM UPDATE
*Core Domains*
*HVACR Theory and Fundamentals*
*New Jersey State Codes and Laws*
*Refrigerant Handling and EPA*
*Hydronic Systems and Steam Heat*
*Electrical Systems and Controls*
*Ventilation and Air Distribution*
*Fuel Gas Piping and Combustion*
*Safety and Professional Ethics*
*Introduction*
*The New Jersey HVAC License Exam is a comprehensive assessment designed to eval
SECTION ONE: QUESTIONS 1–100
, 1. Which of the following is the primary purpose of a P-trap in a condensate drain
line?
A. To increase the velocity of the water flow
B. To prevent sewer gases or conditioned air from escaping/entering
C. To collect sediment before it reaches the main drain
D. To provide a point for manual Priming
🟢 B. To prevent sewer gases or conditioned air from escaping/entering
🔴 Explanation: A P-trap creates a water seal that prevents air or sewer gases from
moving through the pipe while allowing condensate to flow out, maintaining system
pressure and hygiene.
2. In a residential split system, which component is responsible for rejecting heat from
the refrigerant?
A. Evaporator coil
B. Metering device
C. Condenser coil
D. Accumulator
🟢 C. Condenser coil
,🔴 Explanation: The condenser coil is located in the outdoor unit where the high-
pressure, high-temperature gas releases heat to the outside air and condenses into a
liquid.
3. According to the New Jersey Mechanical Code, what is the minimum clearance for a
mechanical appliance from a property line?
A. 2 feet
B. 5 feet
C. 10 feet
D. 0 feet, as long as it is shielded
🟢 C. 10 feet
🔴 Explanation: Standard mechanical codes often specify a 10-foot clearance from
property lines for intake and exhaust openings to prevent nuisance and ensure safety.
4. A technician measures a temperature split of 30°F across an evaporator coil. This
likely indicates:
A. Low airflow
B. Refrigerant overcharge
, C. High return air humidity
D. A dirty condenser coil
🟢 A. Low airflow
🔴 Explanation: A high temperature split (typically above 20°F in cooling) usually
indicates that air is moving too slowly across the coil, allowing it to cool down
significantly more than intended.
5. What is the latent heat of fusion for water at atmospheric pressure?
A. 970 BTUs per pound
B. 144 BTUs per pound
C. 1,200 BTUs per pound
D. 1 BTU per pound
🟢 B. 144 BTUs per pound
🔴 Explanation: The latent heat of fusion is the amount of energy required to change one
pound of ice to one pound of water (or vice versa) at 32°F without changing the
temperature.
6. Which electrical meter setting is used to check for a "blown" fuse while it is removed
from the circuit?
