Texas HVAC Licensing Exam Full-Length
Practice Exam 150 Questions with
Detailed Rationales
Table of Contents
Part I: TDLR Laws, Rules, and Licensing Requirements (Questions 1–25)
● A. Licensing Authority and Class A/B Classifications
● B. Experience and Eligibility Requirements
● C. Insurance, Bonding, and Renewal
● D. Continuing Education
● E. Enforcement and Penalties
Part II: Refrigeration Principles and Components (Questions 26–50)
● A. Vapor-Compression Cycle
● B. Compressors
● C. Condensers and Evaporators
● D. Metering Devices
● E. Refrigerants and Lubricants
Part III: Air Conditioning Heat Loads and Air Distribution (Questions 51–75)
● A. Manual J and Manual N Load Calculations
● B. Psychrometrics
● C. Duct Design and Air Distribution
● D. Indoor Air Quality
Part IV: Electrical Systems and Controls (Questions 76–95)
● A. Motors and Capacitors
, ● B. Control Circuits
● C. Troubleshooting Electrical Faults
● D. Safety and Grounding
Part V: Combustion, Boilers, and Pressure Vessels (Questions 96–115)
● A. Combustion Air and Venting
● B. Boilers and Pressure Vessels
● C. Gas Piping and Combustion Safety
Part VI: EPA Section 608 Refrigerant Regulations (Questions 116–135)
● A. Ozone Depletion and Refrigerant Types
● B. Recovery, Recycling, and Reclamation
● C. Leak Repair and Recordkeeping
● D. Prohibited Practices
Part VII: Codes, Safety, and Business Practices (Questions 136–150)
● A. Mechanical Codes (UMC/IMC/IFGC)
● B. OSHA and Workplace Safety
● C. Texas Business and Law Requirements
Part I: TDLR Laws, Rules, and Licensing Requirements
1. Which Texas state agency regulates air conditioning and refrigeration
contractors?
A) The Texas Department of Insurance
B) The Texas Department of Licensing and Regulation (TDLR) ✅
C) The Texas Commission on Environmental Quality
D) The Texas State Board of Plumbing Examiners
,The Texas Department of Licensing and Regulation (TDLR) is the state
agency responsible for licensing and regulating air conditioning and
refrigeration contractors, technicians, and related businesses in Texas. This
authority derives from Texas Occupations Code Chapter 1302 and the
administrative rules in 16 TAC Chapter 75. The Texas Department of
Insurance regulates insurance, TCEQ regulates environmental matters, and
TSBPE regulates plumbers. None of these agencies administer HVAC
contractor licensing.
2. What are the two classes of Texas ACR contractor licenses?
A) Class A (unlimited) and Class B (25 tons and under) ✅
B) Class I and Class II
C) Residential and Commercial
D) Master and Journeyman
Texas issues two classes of air conditioning and refrigeration contractor
licenses. A Class A license is unlimited in the size of equipment that may be
worked on. A Class B license limits the contractor to systems of 25 tons of
cooling capacity or less per single system, or 1.5 million BTUH heating input
per single system. Class I/II, Residential/Commercial, and
Master/Journeyman are not Texas ACR license classifications.
3. A Texas Class B ACR contractor may perform work on air conditioning
systems with a maximum cooling capacity of:
A) 10 tons
B) 15 tons
C) 25 tons ✅
, D) 50 tons
A Class B license authorizes work on systems of 25 tons of cooling capacity
or less per single system. This limitation is a key distinction between Class A
and Class B licenses. A Class A license is unlimited. 10 tons and 15 tons are
below the Class B threshold, and 50 tons would require a Class A license.
4. How many months of practical experience in air conditioning and
refrigeration work are required to qualify for a Texas ACR contractor
license?
A) 12 months
B) 24 months
C) 36 months
D) 48 months ✅
Applicants must have at least 48 months (4 years) of practical experience in
air conditioning and refrigeration-related work under the supervision of a
licensed ACR contractor within the preceding 72 months (6 years). This
experience requirement ensures that contractors have substantial field
experience before becoming licensed. 12, 24, and 36 months are insufficient.
5. The practical experience required for a Texas ACR contractor license
must be completed within the preceding:
A) 24 months
B) 36 months
C) 48 months
D) 72 months ✅
Practice Exam 150 Questions with
Detailed Rationales
Table of Contents
Part I: TDLR Laws, Rules, and Licensing Requirements (Questions 1–25)
● A. Licensing Authority and Class A/B Classifications
● B. Experience and Eligibility Requirements
● C. Insurance, Bonding, and Renewal
● D. Continuing Education
● E. Enforcement and Penalties
Part II: Refrigeration Principles and Components (Questions 26–50)
● A. Vapor-Compression Cycle
● B. Compressors
● C. Condensers and Evaporators
● D. Metering Devices
● E. Refrigerants and Lubricants
Part III: Air Conditioning Heat Loads and Air Distribution (Questions 51–75)
● A. Manual J and Manual N Load Calculations
● B. Psychrometrics
● C. Duct Design and Air Distribution
● D. Indoor Air Quality
Part IV: Electrical Systems and Controls (Questions 76–95)
● A. Motors and Capacitors
, ● B. Control Circuits
● C. Troubleshooting Electrical Faults
● D. Safety and Grounding
Part V: Combustion, Boilers, and Pressure Vessels (Questions 96–115)
● A. Combustion Air and Venting
● B. Boilers and Pressure Vessels
● C. Gas Piping and Combustion Safety
Part VI: EPA Section 608 Refrigerant Regulations (Questions 116–135)
● A. Ozone Depletion and Refrigerant Types
● B. Recovery, Recycling, and Reclamation
● C. Leak Repair and Recordkeeping
● D. Prohibited Practices
Part VII: Codes, Safety, and Business Practices (Questions 136–150)
● A. Mechanical Codes (UMC/IMC/IFGC)
● B. OSHA and Workplace Safety
● C. Texas Business and Law Requirements
Part I: TDLR Laws, Rules, and Licensing Requirements
1. Which Texas state agency regulates air conditioning and refrigeration
contractors?
A) The Texas Department of Insurance
B) The Texas Department of Licensing and Regulation (TDLR) ✅
C) The Texas Commission on Environmental Quality
D) The Texas State Board of Plumbing Examiners
,The Texas Department of Licensing and Regulation (TDLR) is the state
agency responsible for licensing and regulating air conditioning and
refrigeration contractors, technicians, and related businesses in Texas. This
authority derives from Texas Occupations Code Chapter 1302 and the
administrative rules in 16 TAC Chapter 75. The Texas Department of
Insurance regulates insurance, TCEQ regulates environmental matters, and
TSBPE regulates plumbers. None of these agencies administer HVAC
contractor licensing.
2. What are the two classes of Texas ACR contractor licenses?
A) Class A (unlimited) and Class B (25 tons and under) ✅
B) Class I and Class II
C) Residential and Commercial
D) Master and Journeyman
Texas issues two classes of air conditioning and refrigeration contractor
licenses. A Class A license is unlimited in the size of equipment that may be
worked on. A Class B license limits the contractor to systems of 25 tons of
cooling capacity or less per single system, or 1.5 million BTUH heating input
per single system. Class I/II, Residential/Commercial, and
Master/Journeyman are not Texas ACR license classifications.
3. A Texas Class B ACR contractor may perform work on air conditioning
systems with a maximum cooling capacity of:
A) 10 tons
B) 15 tons
C) 25 tons ✅
, D) 50 tons
A Class B license authorizes work on systems of 25 tons of cooling capacity
or less per single system. This limitation is a key distinction between Class A
and Class B licenses. A Class A license is unlimited. 10 tons and 15 tons are
below the Class B threshold, and 50 tons would require a Class A license.
4. How many months of practical experience in air conditioning and
refrigeration work are required to qualify for a Texas ACR contractor
license?
A) 12 months
B) 24 months
C) 36 months
D) 48 months ✅
Applicants must have at least 48 months (4 years) of practical experience in
air conditioning and refrigeration-related work under the supervision of a
licensed ACR contractor within the preceding 72 months (6 years). This
experience requirement ensures that contractors have substantial field
experience before becoming licensed. 12, 24, and 36 months are insufficient.
5. The practical experience required for a Texas ACR contractor license
must be completed within the preceding:
A) 24 months
B) 36 months
C) 48 months
D) 72 months ✅
