For more practice problems: https://www.waterandwastewatercourses...

To enroll in an online course, click here: https://courses.waterandwastewatercou...



Latest blog post:

https://www.waterandwastewatercourses... .



This video covers 5 common types of questions on the Water Treatment Operator Certification Exam. This video is intended for newer operators studying for the first 2 certification levels.