HVAC / Chiller Operating Engineer Second Class

ASOPE® offers an opportunity to obtain an HVAC / Chiller Operating Engineer - Second Class license. A list of qualifications that are required to receive your HVAC / Chiller Operating Engineer - Second Class license is outlined below. Requirements include being the minimum age of 18 years old, a high school diploma/GED or equivalent, and one year time in grade as an HVAC / Chiller Operating Engineer 3rd class.

If all qualifications are met, you will be required to schedule an exam. The exam consists of a wide range of curriculum including, but not limited to, mathematics, thermodynamics and heat, psychometrics, electricity and electrical safety, pressure-enthalpy diagrams, and heat pumps. This examination will be multiple choice with 50 questions. Upon completion of the HVAC/Chiller Operating Engineer Second Class license exam, an ASOPE® representative will notify you of a "pass" or "fail" status. If failed, you will be offered additional opportunities to retake the exam. Please review our Failed Test Procedures to learn more.

If you have any questions or concerns regarding the HVAC/Chiller Second Class, please contact the ASOPE® national office.

Test Fee $45.00

Requirements to take test

  • Minimum age – 18
  • Education - High School Diploma, GED or equivalent
  • Experience - One year time in grade as an HVAC / Chiller Operating Engineer 3rd class
  • Must have EPA 608 CORE certification

Examination – Written Test 50 Questions Multiple Choice

Licensed to Operate after successfully passing test

  • Maximum Refrigeration or Air Conditioning (unsupervised) 2000 ton

Recommended Books and Reading

  • HVAC Water Chillers and Cooling Towers CRC Press
  • HVAC and Refrigeration Systems American Technical Publishers
  • Industrial Maintenance and Troubleshooting American Technical Publishers  

Test will include competency and proficiency questions in the below listed areas:

  • Mathematics
  • General Industrial Safety
  • Thermodynamics and Heat
  • Electricity and Electrical Safety
  • Psychometrics
  • Commercial Heating and Cooling Systems
  • Commercial Refrigeration Systems
  • Management of Refrigerants and Refrigeration Systems
  • Pressure-Enthalpy Diagrams
  • Compression Systems –Low Side
  • Compression System- High Side
  • Heat Pumps
  • Control Systems
  • Cooling Tower Design, Application, Operation & Maintenance
  • Heating and Cooling Loads and Calculations
  • Distribution System Balance
  • Absorption Chillers Ammonia & Lithium Bromide
  • Vapor Compression Chillers
  • Electronic and Programmable Controllers
  • Mechanical Systems
  • Fluid Power Systems
  • Troubleshooting