Biosafety Study Guide Questions And Correct Answers

Class II Biological Safety Cabinets {Ans: Class II cabinets are designed for personnel, product and environmental protection Class II cabinets are most commonly used in biomedical research laboratories because of their characteristics}Laminar Air Flow {Ans: When flow is low velocity and through narrow tubes, it tends to be more orderly and streamlined and to flow in a straight line. This type of flow is called laminar flow.}Class II, Type A1 BSC {Ans: Maintain a minimum average face velocity of 0.38 m/s (75 ft/min ) May have positive pressure contaminated ducts and plenums Not to be used for work involving volatile toxic chemicals The buildup of chemical vapors in the cabinet (by recirculated air) and in the laboratory (from exhaust air) could create health and safety hazards These hoods offer personnel protection through negative pressure airflow into the cabinet Exhaust approximately 30% of total air handled and recirculate 70% in cabinet To protect the product, the work area in the cabinet is continuously bathed with ultra clean air provided by the supply HEPA filter}Turbulent Air Flow {Ans: When air flows at higher velocities, especially through an airway with irregular walls, flow is generally disorganized, even chaotic, and