Arizona Rheem HVAC Systems
Technician Certification Exam Practice
Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. Which component in a Rheem HVAC system is primarily responsible for
transferring heat between refrigerant and air?
A. Expansion valve
B. Evaporator coil
C. Compressor
D. Condenser
*** The evaporator coil is where the refrigerant absorbs heat from indoor
air, cooling it before it is circulated back into living spaces.***
2. What is the primary function of the compressor in a Rheem HVAC
refrigeration cycle?
A. To filter air
B. To remove humidity
C. To increase refrigerant pressure and temperature
D. To circulate air through the ductwork
,*** The compressor raises the refrigerant’s pressure and temperature so it
can release heat in the condenser.***
3. Which refrigerant is most commonly used in modern Rheem residential
HVAC systems following environmental regulations?
A. R-22
B. R-410A
C. R-134a
D. R-12
*** R-410A is the standard refrigerant in newer HVAC systems due to its
ozone-friendly properties and efficiency.***
4. What does SEER stand for in HVAC terminology?
A. Seasonal Energy Efficiency Ratio
B. Standard Energy Exhaust Rate
C. Seasonal Energy Efficiency Ratio
D. System Emission Efficiency Ratio
*** SEER measures the cooling efficiency of an air conditioner over a typical
cooling season.***
5. If an HVAC system’s air filter is clogged, what is the most likely immediate
effect on the unit?
A. Increased cooling capacity
B. Reduced airflow and potential system strain
C. Higher refrigerant pressure
D. Lower indoor humidity
*** A clogged filter restricts airflow, causing strain on components and
reduced performance.***
, 6. What safety device prevents excessively high pressure in the refrigerant
circuit of a Rheem system?
A. Thermostat
B. Low-pressure switch
C. High-pressure switch
D. Expansion valve
*** The high-pressure switch protects the system by shutting it down if
pressures exceed safe limits.***
7. Why is superheat measured at the outlet of the evaporator?
A. To determine airflow
B. To ensure the refrigerant has fully vaporized
C. To gauge compressor oil return
D. To verify condenser performance
*** Measuring superheat confirms that liquid refrigerant has evaporated
before entering the compressor, preventing damage.***
8. What is the purpose of the condenser fan in an outdoor HVAC unit?
A. To circulate air indoors
B. To pump refrigerant
C. To dissipate heat from the condenser coil
D. To control humidity
*** The condenser fan pulls outdoor air across the condenser coil to expel
heat from the refrigerant.***
9. In a split system, where is the evaporator coil located?
A. Outside with the condenser
B. Inside the air handler
Technician Certification Exam Practice
Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. Which component in a Rheem HVAC system is primarily responsible for
transferring heat between refrigerant and air?
A. Expansion valve
B. Evaporator coil
C. Compressor
D. Condenser
*** The evaporator coil is where the refrigerant absorbs heat from indoor
air, cooling it before it is circulated back into living spaces.***
2. What is the primary function of the compressor in a Rheem HVAC
refrigeration cycle?
A. To filter air
B. To remove humidity
C. To increase refrigerant pressure and temperature
D. To circulate air through the ductwork
,*** The compressor raises the refrigerant’s pressure and temperature so it
can release heat in the condenser.***
3. Which refrigerant is most commonly used in modern Rheem residential
HVAC systems following environmental regulations?
A. R-22
B. R-410A
C. R-134a
D. R-12
*** R-410A is the standard refrigerant in newer HVAC systems due to its
ozone-friendly properties and efficiency.***
4. What does SEER stand for in HVAC terminology?
A. Seasonal Energy Efficiency Ratio
B. Standard Energy Exhaust Rate
C. Seasonal Energy Efficiency Ratio
D. System Emission Efficiency Ratio
*** SEER measures the cooling efficiency of an air conditioner over a typical
cooling season.***
5. If an HVAC system’s air filter is clogged, what is the most likely immediate
effect on the unit?
A. Increased cooling capacity
B. Reduced airflow and potential system strain
C. Higher refrigerant pressure
D. Lower indoor humidity
*** A clogged filter restricts airflow, causing strain on components and
reduced performance.***
, 6. What safety device prevents excessively high pressure in the refrigerant
circuit of a Rheem system?
A. Thermostat
B. Low-pressure switch
C. High-pressure switch
D. Expansion valve
*** The high-pressure switch protects the system by shutting it down if
pressures exceed safe limits.***
7. Why is superheat measured at the outlet of the evaporator?
A. To determine airflow
B. To ensure the refrigerant has fully vaporized
C. To gauge compressor oil return
D. To verify condenser performance
*** Measuring superheat confirms that liquid refrigerant has evaporated
before entering the compressor, preventing damage.***
8. What is the purpose of the condenser fan in an outdoor HVAC unit?
A. To circulate air indoors
B. To pump refrigerant
C. To dissipate heat from the condenser coil
D. To control humidity
*** The condenser fan pulls outdoor air across the condenser coil to expel
heat from the refrigerant.***
9. In a split system, where is the evaporator coil located?
A. Outside with the condenser
B. Inside the air handler
