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Grade 11 · Practice problems

Emergency and protective equipment

53 problems, including 18 🔥 challenging (exam-level, multi-step). Work through them on paper, then reveal every answer to check.

  1. 1. What do the four letters in the P.A.S.S. method for a fire extinguisher stand for?

  2. 2. When fighting a fire with an extinguisher, where exactly do you aim the nozzle, and why?

  3. 3. About how long does a small fire extinguisher spray, and how close must you be for it to work?

  4. 4. Do students need a teacher's permission before using emergency equipment? Explain.

  5. 5. A small, contained fire burns in a beaker. What is often the simplest safe way to put it out?

  6. 6. A student's sleeve catches fire. Which piece of equipment is designed for this, and what personal action helps?

  7. 7. Why should a person whose clothing is on fire never run?

  8. 8. For how long should you flush the eyes at an eyewash fountain after a chemical splash?

  9. 9. Why must you hold your eyes open in the eyewash stream even though it is uncomfortable?

  10. 10. A student wearing contact lenses gets a chemical in the eye. What must be done?

  11. 11. When is an emergency shower (as opposed to an eyewash) the right choice?

  12. 12. After using the emergency shower on chemical-soaked clothing, what must happen to that clothing?

  13. 13. What is the acid–base neutralizing solution used for, and where must it NOT be used?

  14. 14. When acid or base contacts the skin, what do you do BEFORE applying the neutralizing solution?

  15. 15. If skin feels slippery after a base contacts it, what does that indicate and what should you do?

  16. 16. State the single most important rule about when to put on safety goggles in the lab.

  17. 17. May safety goggles be pushed up onto the forehead while measuring a chemical? Why or why not?

  18. 18. When must a fume hood be used?

  19. 19. Should you carry a reacting mixture out of the fume hood to show your teacher? What should you do instead?

  20. 20. Two extinguisher designs exist: a fixed "horn" and a hose-and-nozzle on clips. How does using the hose type differ?

  21. 21. Why should the contents of an extinguisher never be sprayed at a person?

  22. 22. What type of extinguisher is usual in a high-school lab, and what fires can it handle?

  23. 23. Before an emergency ever happens, what map should every student prepare?

  24. 24. Give the correct order of use for a fire extinguisher's four actions.

  25. 25. A large fire extinguisher can be set on its base with the hose freed. What advantage does this give?

  26. 26. What does the WHMIS label on a chemical container tell you?

  27. 27. Name the four main routes by which a chemical can enter or harm the body.

  28. 28. Why is eating, drinking or chewing gum forbidden in a chemistry lab?

  29. 29. What is a Safety Data Sheet (SDS) and how does it differ from the container label?

  30. 30. Distinguish impact safety glasses from chemical splash goggles, and say which is correct for handling liquids.

  31. 31. List four elements of appropriate laboratory attire.

  32. 32. Why must gloves be removed before touching a doorknob, phone or your face?

  33. 33. Give two everyday (non-emergency) safety items you should locate in the lab besides the extinguisher and eyewash.

  34. 34. Why should you never draw a liquid up a pipette using your mouth?

  35. 35. Why is it a rule to report even a minor spill or a single drop of acid rinsed off your skin?

  36. 🔥 Challenging problems
  37. 36. 🔥 ChallengingA bottle carries a pictogram of a corroding hand and surface. What class of hazard is this, and what does it demand?

  38. 37. 🔥 ChallengingExplain why a face shield is worn over goggles rather than instead of them.

  39. 38. 🔥 ChallengingWhy are thin nitrile gloves generally preferred over ordinary latex gloves in the lab?

  40. 39. 🔥 ChallengingA student reasons, “I wore gloves, so I can skip washing my hands before lunch.” Critique this.

  41. 40. 🔥 ChallengingWhy does knowing the location of the eyewash beforehand matter as much as knowing how to use it?

  42. 41. 🔥 ChallengingClassify each as protective or emergency equipment: fume hood, fire blanket, gloves, eyewash, lab coat, neutralizing solution.

  43. 42. 🔥 ChallengingA corrosive vapour is described on an SDS as harmful if inhaled. Which single piece of equipment most directly addresses this, and why?

  44. 43. 🔥 ChallengingWhy is working alone with chemicals, even briefly, prohibited?

  45. 44. 🔥 ChallengingTwo students want to test “what happens” by mixing two leftover reagents not called for in the procedure. Identify every rule this breaks.

  46. 45. 🔥 ChallengingExplain how the label and the SDS work together as a two-stage warning system.

  47. 46. 🔥 ChallengingWhy does a proper lab include a rule against sandals or open-toed shoes?

  48. 47. 🔥 ChallengingAn SDS spill section and the room’s spill kit are both mentioned. How do they relate in an actual spill?

  49. 48. 🔥 ChallengingWhy is tying back long hair part of protective equipment rather than emergency response?

  50. 49. 🔥 ChallengingGive the reasoning for choosing splash goggles, gloves and a fume hood together when using a volatile corrosive acid.

  51. 50. 🔥 ChallengingAfter finishing a lab, list the closing safety steps a careful student takes.

  52. 51. 🔥 ChallengingWhy can a contaminated glove worn around the room be more dangerous than no glove at all?

  53. 52. 🔥 ChallengingA student splashes acid into their eye. What safety equipment should be used, and roughly for how long?

  54. 53. 🔥 ChallengingWhy should volatile or toxic chemicals be handled in a fume hood?