Health, Safety, and Chemical Handling
Know the label before you know the job
Every chemical question resolves to the product label and the safety data sheet (SDS). The label gives the dilution, the use, the contact time, and the hazards; the SDS gives first aid, spill response, and handling information. Traps test whether you dilute only as directed (never "a little extra for strength"), whether you ever mix products, and whether you store chemicals in unlabeled containers. Mixing bleach with an acid or ammonia-containing cleaner releases toxic gas - that is a classic exam scenario.
Personal protection and safe practice
Wear gloves and eye protection when the label requires it, and wash hands after handling chemicals and before breaks. Never eat, drink, or smoke while handling chemicals. Keep chemicals away from food, and never store them in beverage bottles. Ventilate when using strong products and report splashes to skin or eyes immediately, flushing as the label directs.
Physical safety in the room
- Use correct lifting technique: feet apart, bend the knees, keep the load close, pivot rather than twist.
- Watch for wet floors, trailing vacuum cords, and blocked exits; place a wet-floor sign when needed.
- Report damaged furniture, exposed wiring, broken glass, and blood or sharps immediately; do not handle sharps or blood-contaminated items barehanded.
- Know the fire and emergency procedures and the location of exits and alarms.
Rule of thumb
If you cannot identify a chemical or read its label, do not use it - report it.
Worked example
You find an unlabeled spray bottle in your cart. Correct action: do not use it and do not guess by smell; set it aside and report it to your supervisor for proper identification or disposal. The wrong answer choices usually suggest sniffing it, adding water, or pouring it down the drain.