FAQ about the Specialist Certification

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What do I need to study in order to pass the specialist exam?

The specialist exam consists of 100 questions (single choice, multiple choice, or true/false). The exam is based on the materials covered in WFI training courses, with a focus on the required courses. If you study the course material thoroughly, you should have no problem passing the exam. We also recommend that you have at least one year of field experience in the air/liquid filtration and separation industry. WFI offers both online live courses and course recordings to help you prepare.

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What are the required courses for the specialist certification?

For the general CFSS certification (most popular), you can find required courses here

If you are only interested in air/gas filtration, find required courses here

If you are only interested in liquid/water filtration, find required courses here

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Can I check references during the exam?

Yes, you are allowed to refer to course handouts and references during the exam. However, please note that you are not permitted to communicate with or connect to others while taking the exam.

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What is the minimum score required to obtain the specialist certification?

To obtain the specialist certification, applicants must achieve a passing grade of 75% or higher on the Specialist Examination. This score threshold ensures qualification for receiving the specialist certificate.

 

What is the cost to take the exam?

Testing fees are included in the specialist registration fee for applicants.

If the applicant fails to pass the exam, and a re-take is necessary, there will not be any fee charged to re-take the exam. 

 

I did not have a chance to attend the live courses, but I reviewed the course materials (such as handouts and recordings). Am I qualified for the exam?

Yes. Anyone who has registered for the CFSS program is eligible to take the CFSS Exam. Reviewing the course materials (handouts, recordings, PDFs, etc.) qualifies you to sit for the certification exam even if you did not attend the live sessions.

 

When / Where can I take the exam next?

The upcoming CFSS Exam will be conducted online once a year and the time for 2025 will be on November 11, 2025: 8:00–10:00 AM ET. Please note that it is mandatory to have your camera turned on during the exam.
 

How can I get confirmation for the CFSS certification exam?

As a registered CFSS class participant, you will automatically receive the access information for the upcoming CFSS exam. Confirmation is normally sent by email about one month before the exam, and no separate registration is required.

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Further qestions, please contact admin@wfius.org