Texas HVAC Licensing Exam – Advanced Practice Questions 120 Questions and Answers &
Rtionales | 2025/2026 | Instant Download !!
1. What is the minimum SEER rating required for new residential HVAC installations in Texas (as of
the latest regulation)?
a. 12
b. 13
c. 14
d. 15
Correct Answer: c (correct answer)
Rationale: DOE standards set minimum SEER 14 for southern states, including Texas.
2. A technician measuring superheat finds a suction line temperature of 62°F and a saturation
temperature of 45°F. What is the superheat?
a. 12°F
b. 15°F
c. 17°F
d. 20°F
Correct Answer: c (correct answer)
Rationale: 62 − 45 = 17°F.
3. Which license is required to service equipment containing more than 10 lbs of refrigerant in Texas?
a. ACR Technician
b. Environmental HVAC Apprentice
c. Class A Contractor
d. Class B Technician
Correct Answer: c (correct answer)
Rationale: Class A covers unlimited tonnage and refrigerant quantities.
4. What is the required minimum vacuum level for proper system evacuation before charging?
,a. 500 microns
b. 1000 microns
c. 1500 microns
d. 2000 microns
Correct Answer: a (correct answer)
Rationale: Deep vacuum of 500 microns ensures moisture removal.
5. A furnace has an output rating of 72,000 BTU/hr and is 90% efficient. What is the input BTU/hr?
a. 64,800
b. 72,000
c. 80,000
d. 90,000
Correct Answer: c (correct answer)
Rationale: Input = Output ÷ Efficiency = 72,000 ÷ 0.9.
6. What Texas agency regulates HVAC licensing?
a. TDLR
b. TREC
c. DOE
d. TACB
Correct Answer: a (correct answer)
Rationale: Texas Department of Licensing & Regulation governs HVAC.
7. What is the acceptable subcooling if the manufacturer target is 12°F and the measured value is
7°F?
a. System is overcharged
b. System is undercharged
c. Metering device failed
d. Compressor is failing
Correct Answer: b (correct answer)
Rationale: Low subcooling indicates insufficient refrigerant.
,8. What does a high head pressure usually indicate?
a. Low airflow
b. Overcharged system
c. Dirty condenser coil
d. All of the above
Correct Answer: d (correct answer)
Rationale: All listed items raise head pressure.
9. What is the standard temperature drop (ΔT) for cooling systems in Texas?
a. 10–15°F
b. 15–20°F
c. 18–22°F
d. 25–30°F
Correct Answer: b (correct answer)
Rationale: Normal temperature difference across coils is 15–20°F.
10. Which refrigerant is being phased out due to environmental concerns?
a. R-134a
b. R-404A
c. R-410A
d. R-22
Correct Answer: d (correct answer)
Rationale: R-22 (HCFC) phased out per EPA.
11. What is the standard airflow requirement per ton of cooling?
a. 200 CFM
b. 300 CFM
c. 400 CFM
d. 500 CFM
, Correct Answer: c (correct answer)
Rationale: 400 CFM/ton is industry standard.
12. In Texas, which document must be provided to customers before HVAC work begins?
a. License disclosure
b. Manufacturer warranty
c. Technician’s EPA card
d. Insurance certificate
Correct Answer: a (correct answer)
Rationale: TDLR requires mandatory license disclosure.
13. A heat pump operating in heating mode has a high superheat. This indicates:
a. Restriction in the metering device
b. Overcharged system
c. Low airflow
d. Normal operation
Correct Answer: a (correct answer)
Rationale: High superheat = starved evaporator → restriction.
14. What electrical component protects HVAC motors from overheating?
a. Contactor
b. Capacitor
c. Thermistor
d. Overload
Correct Answer: d (correct answer)
Rationale: Motors include overload protection.
15. A technician finds a 35/5 μF capacitor reading 28 μF on the fan side. What is the diagnosis?
Rtionales | 2025/2026 | Instant Download !!
1. What is the minimum SEER rating required for new residential HVAC installations in Texas (as of
the latest regulation)?
a. 12
b. 13
c. 14
d. 15
Correct Answer: c (correct answer)
Rationale: DOE standards set minimum SEER 14 for southern states, including Texas.
2. A technician measuring superheat finds a suction line temperature of 62°F and a saturation
temperature of 45°F. What is the superheat?
a. 12°F
b. 15°F
c. 17°F
d. 20°F
Correct Answer: c (correct answer)
Rationale: 62 − 45 = 17°F.
3. Which license is required to service equipment containing more than 10 lbs of refrigerant in Texas?
a. ACR Technician
b. Environmental HVAC Apprentice
c. Class A Contractor
d. Class B Technician
Correct Answer: c (correct answer)
Rationale: Class A covers unlimited tonnage and refrigerant quantities.
4. What is the required minimum vacuum level for proper system evacuation before charging?
,a. 500 microns
b. 1000 microns
c. 1500 microns
d. 2000 microns
Correct Answer: a (correct answer)
Rationale: Deep vacuum of 500 microns ensures moisture removal.
5. A furnace has an output rating of 72,000 BTU/hr and is 90% efficient. What is the input BTU/hr?
a. 64,800
b. 72,000
c. 80,000
d. 90,000
Correct Answer: c (correct answer)
Rationale: Input = Output ÷ Efficiency = 72,000 ÷ 0.9.
6. What Texas agency regulates HVAC licensing?
a. TDLR
b. TREC
c. DOE
d. TACB
Correct Answer: a (correct answer)
Rationale: Texas Department of Licensing & Regulation governs HVAC.
7. What is the acceptable subcooling if the manufacturer target is 12°F and the measured value is
7°F?
a. System is overcharged
b. System is undercharged
c. Metering device failed
d. Compressor is failing
Correct Answer: b (correct answer)
Rationale: Low subcooling indicates insufficient refrigerant.
,8. What does a high head pressure usually indicate?
a. Low airflow
b. Overcharged system
c. Dirty condenser coil
d. All of the above
Correct Answer: d (correct answer)
Rationale: All listed items raise head pressure.
9. What is the standard temperature drop (ΔT) for cooling systems in Texas?
a. 10–15°F
b. 15–20°F
c. 18–22°F
d. 25–30°F
Correct Answer: b (correct answer)
Rationale: Normal temperature difference across coils is 15–20°F.
10. Which refrigerant is being phased out due to environmental concerns?
a. R-134a
b. R-404A
c. R-410A
d. R-22
Correct Answer: d (correct answer)
Rationale: R-22 (HCFC) phased out per EPA.
11. What is the standard airflow requirement per ton of cooling?
a. 200 CFM
b. 300 CFM
c. 400 CFM
d. 500 CFM
, Correct Answer: c (correct answer)
Rationale: 400 CFM/ton is industry standard.
12. In Texas, which document must be provided to customers before HVAC work begins?
a. License disclosure
b. Manufacturer warranty
c. Technician’s EPA card
d. Insurance certificate
Correct Answer: a (correct answer)
Rationale: TDLR requires mandatory license disclosure.
13. A heat pump operating in heating mode has a high superheat. This indicates:
a. Restriction in the metering device
b. Overcharged system
c. Low airflow
d. Normal operation
Correct Answer: a (correct answer)
Rationale: High superheat = starved evaporator → restriction.
14. What electrical component protects HVAC motors from overheating?
a. Contactor
b. Capacitor
c. Thermistor
d. Overload
Correct Answer: d (correct answer)
Rationale: Motors include overload protection.
15. A technician finds a 35/5 μF capacitor reading 28 μF on the fan side. What is the diagnosis?
