While most of our students pass their exams in 4-6 weeks, our system is a three month enrollment and allows for unlimited Home Study (computer software subscription), Seminars, and Tutoring for a three (3) month period. (2) What is the difference between a Class A and a Class B license?Ĭlass A allows you to work on any size unit.Ĭlass B allows you to work on cooling systems of 25 tons and under, and heating systems of 1.5 million BTUs/hour and under.Īpplications must be submitted to Texas Department of Licensing and Regulation TLDR online or at:Įxaminations are administered by the testing agency PSI Services LLC: “Commercial Refrigeration/Process Heating and Cooling” is limited to coolers, freezers, ice machines, and equipment that provides temperature and humidity controls. Includes central air conditioning and heating. “Environmental Air Conditioning” means treating air to control temperature, humidity, cleanliness, ventilation, and circulation to meet human comfort requirements. (1) What is the difference between “Environmental Air Conditioning” and “Commercial Refrigeration/Process Heating and Cooling”? (R) Commercial Refrigeration and Process Cooling or Heating Title/Class/Number/Endorsement code – TACL/A/000000/C for a “Class A Combined Endorsement Contractor”. License numbers will have the following form: License Requirements & Definitions Summary:Ĭlass A: 120 question exam, 230 minutes time limit, minimum test score 70%Ĭlass B: 100 question exam, 170 minutes hour time limit, minimum test score 70%Įxperience requirement: Your employment history must indicate at least 48 months (4 years) of practical experience with the tools of the trade in the preceding (6) years. Important Note: Reference materials may be highlighted, underlined and/or indexed prior to the examination session, and notes are all permitted prior to the exam session. Manual S – Residential Equipment Selection, 2014 Edition.Manual J – Residential Load Calculation, 2011 Edition.Manual D – Residential Duct Systems, 2014 Edition.The following three references are used for Environmental Air (not Commercial Refrigeration) examinations only: International Fuel Gas Code – 2018 Edition.International Mechanical Code – 2018 Edition.Modern Refrigeration and Air Conditioning 21st Edition.OSHA CFR 29 Parts 1904-Record keeping, 1910-General Industry, 1926-Construction.Texas Air Conditioning and Refrigeration Administrative Rules.Texas Air Conditioning and Refrigeration Contractors Law.The following reference materials are allowed in the examination center: The Contractors School offers the only Complete 3-in-1 System consisting of:ġ) New Home Study Computer Program with 15 excellent sample exams to simulate your actual PSI state exam! Correct Answer: MR&AC – 51.2.1, Volumetric Efficiency = (Actual Volume / Theoretical Volume) x 100 = (6 cu-in / 10 cu-in) x 100 = 60%.If the compressor displacement is 10 cu-in, but the unit’s actual pump volume is only 6 cu-in, what is the pumps calculated volumetric efficiency?.Step_3: Design the minimum ventilation at the larger 100 CFM.Step_2: 20 cfm per person x 2 operators = 40 CFM. ![]() If two operators are performing “normal” technical maintenance of equipment inside a small 200 sq-ft room, what would be the required CFM?.Given that an 80,000 Btu/h gas furnace will have the combustion air supplied from a mechanical air supply system outdoor source, the combustion air in shall be at least _ Cubic Feet per Minute of ventilation?. ![]() Our sample exams simulate your actual PSI state exam!īelow are a few questions from your upcoming PSI state exam: ![]() School enrollment is complete with Home Study Computer Program, Tutoring, and Live Seminars with real questions, answers, code references, and calculations to prepare you for the actual PSI state licensing exam.Ĭustom Home Study Computer Program running on your personal PC Texas ACR Environmental Air Conditioning Contractor preparation is our specialty since 1972.
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