Question

which of the following is the frequency for laminar flow hoods to be recertified?
every 9 months
every 12 months
every 6 months
every 3 months

Explanation:

Laminar - flow hoods are typically recertified every 6 months to ensure they are operating properly and maintaining a sterile or controlled - environment. This is a standard practice in laboratory and clean - room settings to meet regulatory and quality - control requirements.

Answer:

Every 6 months