Fire extinguisher
Classes
Classes
What does the letter on an extinguisher tell you?
(Easy — the class of fire it's rated for)
What does a skull and crossbones on a bottle mean?
(Easy — acute toxicity)
You're about to use the saw. What goes on your face first?
(Easy — safety glasses)
Name the four things every incident report must include.
(Easy — what, where, when, who)
Which unit would you use to decide whether to fight a fire or run?
(Easy — Unit 4)
Burning paper and cardboard in a trash can is which class?
(Easy — Class A, ordinary Flammables)
A container shows a flame. What's your first move?
(Easy — keep heat and sparks away, tell the teacher)
Your hair is down and you're at the drill press. What's the fix?
(Easy — tie it back)
What does PASS stand for?
(Easy — Pull, Aim, Squeeze, Sweep)
A symbol tells you what a container holds. What tells you what to do about it?
(Medium — the response procedure, not the symbol itself)
Why does a grease fire get its own class instead of being a Class B?
(Medium — kitchen media: oils and fats behave differently and need smothering, not a liquid-fuel agent)
A drum shows a flame over a circle. What's different about that from a plain flame?
(Medium — it's an oxidizer: it feeds fire even without air, so keep it away from anything flammable)
Name two pieces of PPE that protect you from things you can't see.
(Medium — earplugs for noise, dust mask for airborne particles)
You see smoke at an outlet. What are your first three moves?
(Medium — call it out, check the fire is small and contained, grab the Class C extinguisher)
. Why do you put gloves on before you touch a bleeding cut, instead of after you see how bad it is?
gloves protect both of you from germs; once blood is on your hands, you've already been exposed.
A propane tank is leaking and burning. Which class, and why isn't it Class B?
(Harder — Class B covers flammable gases as well as liquids, so it is B; the trap is students calling every gas "Class C")
A bin has a biohazard symbol. Why is "just open it and look" the wrong answer?
(Harder — unknown biological contents; don't open, report it)
Loose hoodie sleeves at the lathe — why is that more dangerous than no sleeves at all?
A lathe hoodie typically refers to shop safety warnings about the extreme danger of loose clothing around machinery
(Harder — it can catch and pull you in; roll or remove it)
When do you stop fighting the fire and evacuate instead?
(Harder — when it's bigger than a trash can; pull the alarm and get everyone out)
A student is burned on the forearm and the skin is blistered and broken. Walk through your response, and explain why you don't put anything on the burn.
Hardest — cool water only, no ointments, butter, or ice; cover loosely with a sterile dressing; broken skin means anything you apply can introduce infection
A lithium battery pack is on fire. Which class, and why is water the wrong move?
(Hardest — Class D, combustible metals; water can react and make it worse)
Two symbols both mean "don't touch it" — the health hazard starburst and the exploding bomb. Explain how the response differs.
(Hardest — health hazard: don't handle, report immediately; explosive: leave the area first, then tell the teacher)
A student has goggles pushed up on their forehead while sanding. Name the two separate failures.
(Hardest — eye protection isn't actually over the eyes, and sanding also needs a dust mask)
Your report says "there was a fire in the shop." What's missing, and why does that matter?
(Hardest — no location, time, or names; responders can't act on it and the record is useless)
A student gets a small cut on their hand from a piece of metal. What's the first thing you do?
(Easy — wash your hands and put on gloves before you touch the wound or the blood)