Name at least three practices required by the Chemical Hygiene Plan during routine lab work.

• A. Use of fume hoods, proper chemical storage and segregation, no eating or drinking in the lab, and appropriate PPE and waste handling
• B. Leave chemicals uncapped and eat at the bench
• C. No PPE required
• D. Mix chemicals without labeling

Answer: (A)

The safety concept being tested is that a Chemical Hygiene Plan requires specific practices to minimize exposure and risks during routine lab work. The best choice reflects essential elements: using engineering controls such as fume hoods to ventilate hazardous vapors, storing and segregating chemicals properly to prevent incompatibilities and leaks, prohibiting eating or drinking in the lab to avoid ingesting contaminants, and handling waste with appropriate PPE and proper waste procedures. Together, these measures reduce inhalation, skin contact, and accidental reactions, while ensuring safe disposal of wastes. In contrast, leaving chemicals uncapped and eating at the bench creates direct exposure; no PPE removes critical protection; and mixing chemicals without labeling risks dangerous, uncontrolled reactions and misidentification.