FPGEE 2026 Practice Exam for NABP – The Complete All-in-One Guide to Exam Success!

The function of primary engineering controls (PECs) in a cleanroom environment is to provide a suitable environment for compounding, which involves creating an aseptic area to minimize contamination risk during the preparation of sterile products. PECs include equipment such as laminar flow hoods and biological safety cabinets that are designed to ensure that the air within the workspace is free from particulates and microorganisms.

By maintaining a controlled airflow and using high-efficiency particulate air (HEPA) filters, PECs help to create a clean zone where compounding can be performed according to strict sterility standards. This control ensures that the compounded products remain safe and effective for patient use.

The other options, while related to the overall cleanroom environment, do not specifically capture the unique role of PECs in compounding processes. Filtering and supplying air, modifying room pressure, and controlling temperature and humidity are indeed necessary for maintaining a cleanroom, but they pertain more to the overall environmental controls and not the primary function of PECs that directly relates to compounding activities.