Practice for the Texas air conditioning and refrigeration Certified Technician exam: Texas ACR rules, EPA refrigerant rules, OSHA safety and the HVAC math behind service work, each with its official source.
Question of the day
HVAC theory
A heat strip element measures 9.6 Ω and is on 240 volts. How much current does it draw? (I = V ÷ R)
About the exam
In the official pages' own words, checked October 30, 2026. Confirm on the linked page before you register.
“Applicants who apply for the Certified Technician license will take the TX ACR Certified Technician Examination.” TDLR ↗
“Applicants must submit an application before becoming eligible for the TX Air Conditioning and Refrigeration Contractor or Certified Technician exam.” TDLR ↗
“submit a completed Certified Technician Application Form (PDF) along with the non-refundable application fee of $50.” TDLR ↗
“You may qualify for technician certification by proving that you have performed 24 months of air conditioning and refrigeration-related work under the supervision of a licensed air conditioning and refrigeration contractor.” TDLR ↗
“Applicants may become qualified for technician certification by completing a department-approved certification program consisting of 2,000 hours of combined instruction and practical experience.” TDLR ↗
OSHA 10-Hour card. Many contractors ask for one. It's a course completion card, not a license or certification, and only an OSHA-authorized trainer can give it, in a class or online. OSHA's list of authorized online trainers ↗ includes CareerSafe ↗, for one.
What the job is like
The work, the training and the pay nationwide, in about 90 seconds.
Heating, Air Conditioning, and Refrigeration Mechanic and Installer Career VideoCareerOneStop · YouTube · plays from youtube-nocookie.com
Video from CareerOneStop, sponsored by the U.S. Department of Labor. Tap CC on the player for captions. On CareerOneStop ↗
Free study videos
They help you study but don't count toward a license, card or certification. Picked by us from YouTube; nothing loads until you tap play.
EPA Test Section 608 Study Guide Free FlashcardsESCO Institute-HVAC Excellence · YouTube · plays from youtube-nocookie.com
Flashcard review from ESCO, an EPA-approved 608 certifying organization.
EPA 608 Core Prep - Part 1HVAC School · YouTube · plays from youtube-nocookie.com
Bryan Orr walks through the Core section of the federal EPA 608 test. Federal, so it applies in Texas.
EPA 608 Core Prep - Part 2HVAC School · YouTube · plays from youtube-nocookie.com
Second part of the Core review: key dates, recovery cylinders and testing details.
Basic Refrigeration Cycle Explained (HVAC 101) Step By StepJumper man Tech · YouTube · plays from youtube-nocookie.com
Step-by-step tour of the four main parts and what the refrigerant does in each. General, not Texas-specific.
AC Pressures, Subcooling and SuperheatHVAC School · YouTube · plays from youtube-nocookie.com
How pressures, superheat and subcooling fit together when diagnosing a system - the biggest part of the exam outline. General, not Texas-specific.
Electrical Basics - The CircuitHVAC School · YouTube · plays from youtube-nocookie.com
The parts of a circuit and what each does, before Ohm's law on heat strips and motors. General, not Texas-specific.
Cómo funciona el ciclo de refrigeración en el aire acondicionadoElectrotec · YouTube · en español · plays from youtube-nocookie.com
The refrigeration cycle in Spanish, for Spanish-speaking candidates (Texas offers the ACR exam in Spanish).
Video Preparatorio Certificación EPA608 Tipo IGermán P. Fuentes Durán · YouTube · en español · plays from youtube-nocookie.com
EPA 608 Type I review in Spanish. A smaller independent channel; federal rules, so it applies in Texas.
“Modern Refrigeration and Air Conditioning, Althouse, Turnquist and others, Goodheart-Willcox Publishers, 22nd Edition, 2025” test-takers.psiexams.com ↗
“Candidates are responsible for bringing their own reference materials to the examination site.” test-takers.psiexams.com ↗
“Only non-programmable calculators that are silent, battery-operated, do not have paper tape printing capabilities, and do not have a keyboard containing the alphabet will be allowed in the examination site.” test-takers.psiexams.com ↗
“All air conditioning and refrigeration examinations are available in English and Spanish for no additional cost.” test-takers.psiexams.com ↗
“If you fail an exam, you may schedule a retake with PSI, within 24-48 hours of your failed exam.” TDLR ↗
“You must complete all requirements of the application process, including passing the licensing exam, within one year of the date the application is filed.” TDLR ↗
“Your score will be given to you immediately following completion of the examination.” test-takers.psiexams.com ↗
“Technicians must work under the supervision of a licensed air conditioning and refrigeration contractor and may not advertise air conditioning and refrigeration services.” TDLR ↗
“designation is valid for a period of 1 year from the date of issue.” TDLR ↗
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