Volumetric Mixer Certification Program

The Volumetric Mixer Operator Certification program consists of 4 in-depth topics. The course content is based on a nationally agreed upon standard of knowledge and skills every professional Volumetric Mixer Operator should know. At the end of each section, there is a short quiz that is designed to ensure that you have an understanding of the material presented.

The four (4) areas covered in the program are:

  • Section I – "Safety"
  • Section II – "Concrete Technology"
  • Section III – "Volumetric Operation and Maintenance"
  • Section IV – "Customer and Company Relations"

Exam Information

The VMOC exam is closed-book and consists of 65 multiple-choice questions. One hour and 45 minutes (1:45) is given to take the exam.

The exam must be given by a Proctor. The Proctor must be a company official, certified teacher, professional engineer, or a college professor.

Results are mailed two (2) to three (3) weeks from the day/date the exams are received.

Ordering Material

To order materials please complete the Materials Order Form below and return it with your payment to NRMCA's Certification Programs Manager Shawnita Dickens via email or fax: 703-706-4809. Materials must be paid for in advance and are shipped once payment is received.

VMMB Associate Members receive $100 off the total price, per operator certification.

More Information

Course Content

For questions on the course content contact Gary Mullings via email, or phone, 703-706-4861, or Kevin Walgenbach via email, or phone, 703-706-4857.


For questions on the certification contact Shawnita Dickens via email, or phone, 703-706-4854.