Certified Safety Professional Exam 2025 – 400 Free Practice Questions to Pass the Exam

Class 2, Type B1 biological safety cabinets are designed with a notable characteristic that includes a fixed work opening. This design feature is critical for maintaining the safety and integrity of the environment when handling biohazardous materials. The fixed work opening creates a consistent, controlled airflow that helps protect the user, the environment, and the samples from contamination.

Having a fixed work opening also enhances the cabinet's ability to exhaust potentially hazardous aerosols generated during procedures. This characteristic is essential for ensuring that contaminated air is effectively removed from the cabinet while providing a barrier between the user and the work area.

In contrast, some of the other options do not accurately reflect the features of Class 2, Type B1 cabinets. For instance, while they do have a general design that allows for a sliding sash, they are specifically distinguished by their fixed opening which is not adjustable. The assertion that they only function with non-toxic agents is misleading as they are designed to handle a variety of biological materials, including potentially toxic agents. Finally, the requirement for HEPA filtration is a standard feature of these cabinets to ensure effective air filtration, which is vital in maintaining a safe working environment.