SKU: TX_HVAC_Combined_EA_CR Category: Tag:


Texas ACR Combined Endorsement Contractor exam preparation is our specialty since 1972. 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.

Custom Home Study Computer Program running on your personal PC

Our sample exams simulate your actual PSI state exam!

Below are a few questions from your upcoming PSI state exam:

  1. Using the duct size calculator provided, and based on the effect of compression of the flexible duct on the air flow efficiency, what would be the approximate CFM air quantity given the following variables? 15% compression, 10-inch flexible duct, 0.1 friction loss.
    • Correct Answer: ADI Duct Size Calculator – 200 CFM
  2. Calculate the amount to heat in BTUs given a five (5) pound block of ice that is frozen stable at 32 degrees F, and is to be heated to 82 degrees F?
    • Step_1: Not a required step, as the block is not below freezing temperature of 32.
    • Step_2: BTU = Weight of Ice x Latent heat of fusion of Ice = 5 pounds x 144 BTUs/pound = 720 BTUs.
    • Step_3: BTU = Weight of Water x Specific Heat of Water x Temperature change = 5 pounds x 1.0 x 50 degrees F (82-32) = 250 BTUs.
    • Step_4: Finally, sum of the sub totals = 720 + 250 = 970 BTUs
  3. How many Btu’s does a 100 W incandescent light produce per hour?
    • Correct Answer: MR&AC – Heat from Lights is 1 W = 3.41 Btu/hr. Therefore, calculate the load = 100-watt x 3.41 Btu/hr = 341 Btu/hr
  4. Determine the approximate low side pressure of R-22 at 5 degrees F?
    • Correct Answer: MR&AC – Appendix E, E.5 = 28 psig
  5. What would be the calculated power factor of a circuit operating on 120-volts that draws 9-amperes, if the output power is only 1000-watts?
    • Step_1: Calculate the Input power using Ohms Law P = I x E = 9A x 120V = 1,080 VA
    • Step_2: Calculate the Power Factor = Output Power / Input Power = 1000 Watts / 1,080 VA = 0.9259 = 93%

The Contractors School offers the only Complete 3-in-1 System consisting of:

1) New Home Study Computer Program with 30 excellent sample exams to simulate BOTH of your actual PSI state exams!
.     Environmental Air Conditioning
    Commercial Refrigeration and Process Cooling or Heating
2) Weekend Seminar or Webinar!
3) Engineering tutoring help!

The following reference materials are allowed in the examination center:

Business and Law Reference List:

  • Texas Air Conditioning and Refrigeration Contractors Law
  • Texas Air Conditioning and Refrigeration Administrative Rules
  • OSHA CFR 29 Parts; 1904-Record keeping, 1910-General Industry, 1926-Construction.
  • IRS Publication 15 (Circular E)

Technical Reference List:

  • Modern Refrigeration and Air Conditioning 21st Edition
  • ADI Duct Size Calculator

Code Reference List:

  • International Mechanical Code – 2018 Edition
  • International Fuel Gas Code – 2018 Edition
  • Uniform Mechanical Code – 2018 Edition

The following three references are used for Environmental Air (not Commercial Refrigeration) examinations only:

  • Manual D – Residential Duct Systems, 2014 Edition
  • Manual J – Residential Load Calculation, 2011 Edition
  • Manual S – Residential Equipment Selection, 2014 Edition

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.

License Requirements & Definitions Summary:

Class A: 120 question exam, 230 minutes time limit, minimum test score 70%
Class B: 100 question exam, 170 minutes hour time limit, minimum test score 70%
State Application Fee = $115
Class A: PSI Test Fee = $74
Class B: PSI Test Fee =$60
Experience 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.

License numbers will have the following form:

Title/Class/Number/Endorsement code – TACL/A/000000/C for a “Class A Combined Endorsement Contractor”. Endorsement codes are as follows:
(C) Combined Endorsement
(E) Environmental Air Conditioning
(R) Commercial Refrigeration and Process Cooling or Heating

Frequently Asked Questions:

(1) What is the difference between “Environmental Air Conditioning” and “Commercial Refrigeration/Process Heating and Cooling”?

“Environmental Air Conditioning” means treating air to control temperature, humidity, cleanliness, ventilation, and circulation to meet human comfort requirements. Includes central air conditioning and heating.

“Commercial Refrigeration/Process Heating and Cooling” is limited to coolers, freezers, ice machines, and equipment that provides temperature and humidity controls.

(2) What is the difference between a Class A and a Class B license?

Class A allows you to work on any size unit.

Class B allows you to work on cooling systems of 25 tons and under, and heating systems of 1.5 million BTUs/hour and under.

Applications must be submitted to Texas Department of Licensing and Regulation TLDR online or at:
. (512) 463-6599

Examinations are administered by the testing agency PSI Services LLC:
. (833) 333-4741

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. Questions, answers, and article references that you need to pass the new PSI state examination are contained in this new program. Choose this program if you are serious about passing your state exam with PSI. Go into the test prepared with the best Home Study Computer Program in Texas!

Click ADD TO CART at the top of this page to begin your studies today!