Minnesota Department of Transportation

511 Travel Info

Technical Certification Program

Concrete Field Tester Recertification (CFTR)


  • Your Concrete Field Tester Certification must still be current for you to take the recertification course.

Expiration and recertification options

  • This certification expires after five seasons.
  • A recertification must be completed before the end of the fifth training season.
  • If your certification has recently expired and you have relevant work experience, you may apply to regain MnDOT certification through a Recently Expired Certification Exam. Otherwise, you must take the initial certification course again to regain certification.

Class logistics

  • Learning mode: eLearning
  • If you need to register: Learn about the certification process and then register for the class.
  • Logistics: See the Registration Confirmation and Class Reminder emails from Lake Superior College for class deadlines and directions.
  • Learning differences and accommodations: If you have a disability or learning issue, either permanent or temporary, which might affect your ability to perform in a class, the online exam, or the performance exam, contact Suzanne Johnsrud, 218-428-1002, to discuss possible accommodations.
  • Professional development hours (PDHs): 6
  • Lake Superior College course credits possible: 0


The Concrete Field Tester Recertification eLearning option is a self-paced online course, covering key knowledge and skills used by people working in the certification area.

 Concrete Field Tester Recertification eLearning

eLearning students: You may take as long as you like to go through the eLearning class, as long as you complete the exam by the deadline – May 1, 2024. We also recommend reviewing the course materials for the initial certification or recertification course before taking the exam, especially if you have not been working in the certification area.

Students taking the Concrete Field Inspector Recertification: You may use this free eLearning course to review and study the Tester material at your own pace, before or after your class. You must, however, meet the exam deadline for the class you took.

About the certification exams

Written exam process

  • You will have 120 minutes to complete the 35 question written exam online.
  • You must score 70% or higher to pass; if you score 60-69%, you may request a retest.
  • The exam will open for you at the end of the last day of class.
  • You must complete the exam within one week after it is open for you, meaning the same day the following week.
  • Find your exam to take it when it is open for you.

Materials allowed during the written exam

This is an open book exam. You may use the training manual and all other course materials during the exam. A calculator is provided within the online exam.

Performance exam

  • None