New York HVAC Technician
Certification Exam With Actual
Questions & Verified Answers,Plus
Rationales/Expert Verified For
Guaranteed Pass Graded A+/2026
/Latest Update/Instant Download Pdf
1. Which of the following refrigerants is being phased out due to ozone
depletion potential?
A. R-410A
B. R-22
C. R-134a
D. R-1234yf
Rationale: R-22 (HCFC) is being phased out under the Montreal Protocol
due to its ozone-depleting chlorine content.
2. The low side of a refrigeration system operates at:
A. High temperature and low pressure
B. Low temperature and low pressure
C. High temperature and high pressure
D. Low temperature and high pressure
Rationale: The evaporator (low side) absorbs heat, resulting in low
pressure and low temperature conditions.
3. What is the main purpose of a TXV (Thermostatic Expansion Valve)?
A. Compress the refrigerant
B. Regulate refrigerant flow into the evaporator
C. Remove moisture from refrigerant
D. Control condenser pressure
, Rationale: The TXV controls refrigerant flow rate based on evaporator
temperature and superheat.
4. Which component separates liquid and vapor refrigerant before entering
the compressor?
A. Accumulator
B. Condenser
C. Suction accumulator
D. Receiver-drier
Rationale: The suction accumulator stores excess refrigerant and
ensures only vapor enters the compressor.
5. What does superheat indicate in a refrigeration system?
A. Heat removed in the condenser
B. The temperature of vapor above its saturation temperature
C. The temperature of liquid refrigerant
D. Pressure in the evaporator
Rationale: Superheat measures how much the refrigerant vapor is
heated beyond its boiling point, used to prevent liquid slugging.
6. Which of the following is a sign of an undercharged system?
A. High suction pressure
B. Frost on suction line
C. Low suction pressure and high superheat
D. High discharge pressure
Rationale: An undercharged system lacks refrigerant, reducing suction
pressure and increasing superheat.
7. Which law relates pressure and temperature in a closed container of
gas?
A. Charles’s Law
B. Boyle’s Law
C. Gay-Lussac’s Law
D. Dalton’s Law
Rationale: Gay-Lussac’s Law states that pressure and temperature are
directly proportional in a fixed volume.
, 8. What is the purpose of a condenser?
A. Absorb heat
B. Meter refrigerant
C. Reject heat from the system
D. Compress refrigerant
Rationale: The condenser releases heat absorbed in the evaporator to
the ambient air or water.
9. What type of current is typically used in residential HVAC systems?
A. DC only
B. AC single-phase
C. AC three-phase
D. Pulsed DC
Rationale: Most residential systems operate on 120/240V single-phase
AC power.
10.The EPA Section 608 certification is required for technicians who:
A. Install ductwork only
B. Work on heating-only systems
C. Handle refrigerants
D. Replace thermostats
Rationale: EPA 608 certification ensures technicians can safely handle
and dispose of refrigerants.
11.What does a high superheat reading usually indicate?
A. Overcharge
B. Undercharge or restricted evaporator
C. Dirty condenser
D. Faulty compressor
Rationale: High superheat means insufficient refrigerant or poor
evaporator heat absorption.
12.Which component removes moisture and debris from the refrigerant?
A. Evaporator
B. Accumulator
C. Filter-drier
D. TXV
Certification Exam With Actual
Questions & Verified Answers,Plus
Rationales/Expert Verified For
Guaranteed Pass Graded A+/2026
/Latest Update/Instant Download Pdf
1. Which of the following refrigerants is being phased out due to ozone
depletion potential?
A. R-410A
B. R-22
C. R-134a
D. R-1234yf
Rationale: R-22 (HCFC) is being phased out under the Montreal Protocol
due to its ozone-depleting chlorine content.
2. The low side of a refrigeration system operates at:
A. High temperature and low pressure
B. Low temperature and low pressure
C. High temperature and high pressure
D. Low temperature and high pressure
Rationale: The evaporator (low side) absorbs heat, resulting in low
pressure and low temperature conditions.
3. What is the main purpose of a TXV (Thermostatic Expansion Valve)?
A. Compress the refrigerant
B. Regulate refrigerant flow into the evaporator
C. Remove moisture from refrigerant
D. Control condenser pressure
, Rationale: The TXV controls refrigerant flow rate based on evaporator
temperature and superheat.
4. Which component separates liquid and vapor refrigerant before entering
the compressor?
A. Accumulator
B. Condenser
C. Suction accumulator
D. Receiver-drier
Rationale: The suction accumulator stores excess refrigerant and
ensures only vapor enters the compressor.
5. What does superheat indicate in a refrigeration system?
A. Heat removed in the condenser
B. The temperature of vapor above its saturation temperature
C. The temperature of liquid refrigerant
D. Pressure in the evaporator
Rationale: Superheat measures how much the refrigerant vapor is
heated beyond its boiling point, used to prevent liquid slugging.
6. Which of the following is a sign of an undercharged system?
A. High suction pressure
B. Frost on suction line
C. Low suction pressure and high superheat
D. High discharge pressure
Rationale: An undercharged system lacks refrigerant, reducing suction
pressure and increasing superheat.
7. Which law relates pressure and temperature in a closed container of
gas?
A. Charles’s Law
B. Boyle’s Law
C. Gay-Lussac’s Law
D. Dalton’s Law
Rationale: Gay-Lussac’s Law states that pressure and temperature are
directly proportional in a fixed volume.
, 8. What is the purpose of a condenser?
A. Absorb heat
B. Meter refrigerant
C. Reject heat from the system
D. Compress refrigerant
Rationale: The condenser releases heat absorbed in the evaporator to
the ambient air or water.
9. What type of current is typically used in residential HVAC systems?
A. DC only
B. AC single-phase
C. AC three-phase
D. Pulsed DC
Rationale: Most residential systems operate on 120/240V single-phase
AC power.
10.The EPA Section 608 certification is required for technicians who:
A. Install ductwork only
B. Work on heating-only systems
C. Handle refrigerants
D. Replace thermostats
Rationale: EPA 608 certification ensures technicians can safely handle
and dispose of refrigerants.
11.What does a high superheat reading usually indicate?
A. Overcharge
B. Undercharge or restricted evaporator
C. Dirty condenser
D. Faulty compressor
Rationale: High superheat means insufficient refrigerant or poor
evaporator heat absorption.
12.Which component removes moisture and debris from the refrigerant?
A. Evaporator
B. Accumulator
C. Filter-drier
D. TXV
