Serving the HVAC and Plumbing industries since 1986


Try our backword method for teaching you the codes and other information needed to pass the HVAC contractors exam.  If you wish to pass your exam, you must read the following instructions. We call it backword because we tell you where the answers are before you answer the question.

Below is a button that will start the exam. BUT WAIT, I aint through explaining how this works. Each question will have a [i] at its beginning. When your curser is placed over it, an explanation and/or answer source will be given to you. BEFORE ANSWERING THE QUESTION, go to the answer source and locate the answer. This sample test has only 15 questions, and, will take about an hour to complete. Once you’re ready to start learning click the button below. Don’t quit until your batting 100%

Welcome to EMS’s sample licensing practice test site. This practice test consists of 15 questions of the type you will be faced with on the actual exam. In addition, we offer a similar practice test with 150+ questions.  Unfortunately, the answers are not free. Click HERE to view the questions. To help with the expense of maintaining this site, we are charging a measly $39.95 for the 150 questions with answers and where we got them. Below is a list of reference books the exam is based on: If you choose not to purchase the answers, you will, nevertheless, get a good idea of what you will be facing on the exam.

          Click here to access our free HVAC 150+ question backword exam

         “You don’t know, what you don’t know, till you need to know.”


ICC International Mechanical Code 2021

ICC International Fuel Gas Code 2021

ACCA Manual J, 8th edition

ACCA Manual D

NASCLA Contractor Business and Project Management

Immediately after your purchase has been verified, you will recieve a message on your screen, thanking you for your order, along with a link to access the exam with answers and explanations.

If you can pass this test, your HVAC licensing exam will be a walk in the park. A prep course would simply be a waste of money

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