The following HVAC practice test has been prepared by ENERGY MARKETING SERVICE to help you prepare for the state licensing exam... The questions are representative of those you will face on the actual exam. You will need the International Mechanical Code, International Fuel Gas Code and ACCA Manuals J and D to take this exam. The test should be timed for 2 hours. If you feel you need help obtaining your license please see our "GUIDE TO PASSING THE HVAC EXAM". It is only $97 and considered by most examinees to be more valuable than a $400 cram course.