Diesel Plant - Chief

Are you ready to take the next step and become a licensed Diesel Plant - Chief? ASOPE® offers the opportunity to obtain your Diesel Plant - Chief license. The list of qualifications that are required to receive your Diesel Plant - Chief license are outlined below. Some of the requirements include being 18 or older (a legal adult), having a high school diploma/GED or equivalent, and a minimum of four years experience as an engineer in charge of operations and maintenance of marine or stationary of multiple diesel engine plants.

If all qualifications are met, you will be required to schedule an exam. The exam will have a written portion, and a multiple choice portion with 50 questions. The exam consists of a wide range of curriculum including, but not limited to, switchgear, voltage and control excitation, performance testing and vibration analysis, station battery, general maintenance practices, environmental regulations, and more (see list below). Upon completion of your Diesel Plant - Chief 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 Diesel Plant - Chief exam. Please review our Failed Test Procedures to learn more.

If you have any questions or concerns regarding the Power Engineer - Chief license, please contact the ASOPE® national office.


  • Minimum age - Adult
  • Education - High School Diploma / GED or Equivalent
  • Experience - Four years as Engineer in Charge of operations and maintenance of marine or stationary multiple diesel engine plants


  • Written Test 50 Questions Multiple Choice

Licensed to Operate After Successfully Passing Test

  • Maximum Prime Mover Horsepower (Unlimited)

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

Curriculum at the Minimum

  • General Industrial Safety
  • Switchgear
  • Synchronizing and Load Control
  • Voltage Control and Excitation
  • MW and MVARS
  • Governor Characteristics
  • Stopping and Starting Procedures
  • Performance Testing, Vibration Analysis
  • Pre-planned Maintenance and Scheduled Outages
  • Excitation Systems Cooling
  • Exhaust Heat Recovery, Monitoring Gas Temperatures
  • Monitoring Engine Operation
  • Operating Guidelines
  • Control Systems
  • Protection Devices
  • Station Service A.C. Power Supply
  • D.C. Power Supply
  • Station Battery
  • Plant Local and Remote Control Systems
  • Maintenance Planning
  • Electrical Generation, Distribution and Transmission Safety
  • General Maintenance Practices
  • Environmental Regulations