Fire Safety and Extinguisher Use Course 2026

1. Pregunta 1 de 25

   Which three things must come together for a fire to start?

   • AFuel, carbon dioxide and water
   • BSmoke, water and wind
   • CHeat, light and sound
   • DFuel, heat and oxygen
   Ver respuesta

   Respuesta: D. Fuel, heat and oxygen

   A fire needs fuel, oxygen and heat at the same time. This is often drawn as the fire triangle.

2. Pregunta 2 de 25

   How does removing one side of the fire triangle help?

   • AIt only changes the colour of the smoke
   • BIt turns the fire into a Class D fire
   • CIt makes the fire burn more slowly but never stops it
   • DWithout fuel, heat or oxygen, the fire cannot keep burning
   Ver respuesta

   Respuesta: D. Without fuel, heat or oxygen, the fire cannot keep burning

   Every way of putting out a fire works by taking away fuel, heat or oxygen.

3. Pregunta 3 de 25

   A water extinguisher puts out a fire mainly by doing what?

   • ACooling the burning material
   • BRemoving all the fuel
   • CAdding oxygen
   • DCoating electrical wires
   Ver respuesta

   Respuesta: A. Cooling the burning material

   Water cools burning material below the point where it can keep burning.

4. Pregunta 4 de 25

   A carbon dioxide (CO2) extinguisher works mainly by doing what?

   • AHeating the fuel
   • BLeaving a thick foam blanket on paper
   • CSoaking the fuel with water
   • DSmothering the fire by pushing away the oxygen
   Ver respuesta

   Respuesta: D. Smothering the fire by pushing away the oxygen

   CO2 displaces the oxygen around the fire, which smothers it.

5. Pregunta 5 de 25

   Which class of fire involves ordinary materials like paper, wood, cloth and many plastics?

   • AClass C
   • BClass K
   • CClass B
   • DClass A
   Ver respuesta

   Respuesta: D. Class A

   Class A fires involve ordinary combustibles such as paper, wood, cloth, rubber and plastics.

6. Pregunta 6 de 25

   A fire in spilled gasoline or paint thinner is which class?

   • AClass B
   • BClass D
   • CClass K
   • DClass A
   Ver respuesta

   Respuesta: A. Class B

   Class B fires involve flammable liquids, gases, oils, paints and lacquers.

7. Pregunta 7 de 25

   A fire in a plugged-in computer or an electrical panel is which class?

   • AClass D
   • BClass B
   • CClass C
   • DClass A
   Ver respuesta

   Respuesta: C. Class C

   Class C fires involve energized (live) electrical equipment.

8. Pregunta 8 de 25

   Which class of fire involves burning metals such as magnesium or sodium?

   • AClass A
   • BClass D
   • CClass K
   • DClass C
   Ver respuesta

   Respuesta: B. Class D

   Class D fires involve combustible metals like magnesium, titanium, sodium and potassium. They need special extinguishing agents.

9. Pregunta 9 de 25

   A deep fryer in a restaurant kitchen catches fire. Which class is it?

   • AClass A
   • BClass D
   • CClass K
   • DClass C
   Ver respuesta

   Respuesta: C. Class K

   Class K fires involve cooking oils and fats in cooking appliances.

10. Pregunta 10 de 25

    Why must you NOT use a water extinguisher on an electrical fire?

    • AWater is too heavy to spray
    • BWater turns into a flammable gas
    • CWater makes electrical fires burn longer only on weekends
    • DWater conducts electricity, so you could be shocked
    Ver respuesta

    Respuesta: D. Water conducts electricity, so you could be shocked

    Water extinguishers are only for Class A fires. They must not be used on electrical, flammable liquid or cooking oil fires.

11. Pregunta 11 de 25

    Which extinguisher type is the right one for a Class K kitchen fire?

    • AWater
    • BWet chemical
    • CCarbon dioxide only
    • DClass D powder
    Ver respuesta

    Respuesta: B. Wet chemical

    Wet chemical extinguishers are made for cooking oil fires and help prevent re-ignition.

12. Pregunta 12 de 25

    An extinguisher labelled for Classes A, B and C is usually which type?

    • AWet chemical
    • BMulti-purpose dry chemical
    • CClass D powder
    • DPlain water
    Ver respuesta

    Respuesta: B. Multi-purpose dry chemical

    Dry chemical extinguishers cover Class B and C fires, and some types also cover Class A.

13. Pregunta 13 de 25

    What is a drawback of using a dry chemical extinguisher in a server room?

    • AIt cannot put out any electrical fire
    • BIt adds oxygen to the room
    • CIt leaves a residue that can damage electrical equipment
    • DIt only works on wood
    Ver respuesta

    Respuesta: C. It leaves a residue that can damage electrical equipment

    Dry chemical agents leave a powder residue that can harm sensitive electrical equipment.

14. Pregunta 14 de 25

    Why should you take care when using a CO2 extinguisher in a small, closed room?

    • ACO2 makes the room too hot
    • BCO2 is flammable
    • CCO2 conducts electricity
    • DCO2 pushes away oxygen, which can make it hard for you to breathe
    Ver respuesta

    Respuesta: D. CO2 pushes away oxygen, which can make it hard for you to breathe

    Because CO2 displaces oxygen, using it in a confined space needs proper respiratory protection.

15. Pregunta 15 de 25

    What does PASS stand for when using a fire extinguisher?

    • APush, Alert, Spray, Stop
    • BPull, Aim, Squeeze, Sweep
    • CPoint, Aim, Shoot, Stand
    • DPull, Alarm, Shout, Stay
    Ver respuesta

    Respuesta: B. Pull, Aim, Squeeze, Sweep

    PASS reminds you to pull the pin, aim at the base of the fire, squeeze the handle and sweep side to side.

16. Pregunta 16 de 25

    When you use an extinguisher, where should you be standing?

    • ABetween the fire and your escape route
    • BOn a chair so you can see better
    • CIn a corner far from any door
    • DWith the fire between you and the exit
    Ver respuesta

    Respuesta: A. Between the fire and your escape route

    Always keep your way out behind you so you can leave if the fire grows.

17. Pregunta 17 de 25

    How should you sweep the spray on a fire spreading across the floor?

    • AFrom the middle outward
    • BOnly at the smoke
    • CFrom the edges inward
    • DStraight up at the ceiling
    Ver respuesta

    Respuesta: C. From the edges inward

    Sweep floor fires from the edges in, so you push the fire back on itself instead of spreading it.

18. Pregunta 18 de 25

    The fire seems to be out after you used the extinguisher. What should you do?

    • APut the empty extinguisher back on its hook
    • BKeep watching it, because it may reignite
    • COpen all the windows and leave
    • DWalk away right away
    Ver respuesta

    Respuesta: B. Keep watching it, because it may reignite

    Never walk away from a fire that seems to be out. Hot material can flare up again.

19. Pregunta 19 de 25

    In which situation should you NOT try to fight a fire?

    • AYou know what is burning and have the right extinguisher
    • BThe fire is tiny and in a wastebasket
    • CThe fire is spreading beyond where it started
    • DYou are trained and your exit is behind you
    Ver respuesta

    Respuesta: C. The fire is spreading beyond where it started

    Do not fight a fire that is spreading, or if you do not know what is burning or how to use the extinguisher.

20. Pregunta 20 de 25

    You cannot put out a fire safely. What should you do?

    • APull the fire alarm, evacuate and call the fire department
    • BKeep spraying until the extinguisher is empty
    • CGo back for your belongings
    • DHide in a washroom until it is out
    Ver respuesta

    Respuesta: A. Pull the fire alarm, evacuate and call the fire department

    If you cannot safely put out the fire, raise the alarm, get out and call the fire department.

21. Pregunta 21 de 25

    How often should portable fire extinguishers be visually inspected?

    • AMonthly
    • BOnly after a fire
    • CEvery day by the fire department
    • DOnce every 5 years
    Ver respuesta

    Respuesta: A. Monthly

    CCOHS advises a visual inspection of portable fire extinguishers every month.

22. Pregunta 22 de 25

    How often should portable fire extinguishers be serviced?

    • AOnly when they are empty
    • BNever, they last forever
    • CAt least once a year, or sooner if the monthly check finds a problem
    • DEvery 10 years
    Ver respuesta

    Respuesta: C. At least once a year, or sooner if the monthly check finds a problem

    Extinguishers should be serviced at least yearly, or whenever an inspection shows servicing is needed.

23. Pregunta 23 de 25

    On patrol, you find an extinguisher with a badly rusted, pitted cylinder. What should happen?

    • AMove it to a different floor
    • BReport it so it can be taken out of service and replaced
    • CLeave it, because rust does not matter
    • DPaint over the rust
    Ver respuesta

    Respuesta: B. Report it so it can be taken out of service and replaced

    Corrosion that causes pitting is a reason to remove an extinguisher from service.

24. Pregunta 24 de 25

    Which is a good way to store flammable liquids at a site?

    • AIn a cool, well-ventilated place using proper flammable storage equipment
    • BIn a hot basement next to the furnace
    • CIn large open buckets in a hallway
    • DOn top of electrical panels
    Ver respuesta

    Respuesta: A. In a cool, well-ventilated place using proper flammable storage equipment

    Store flammables in a cool, ventilated place in proper storage equipment, avoid large amounts, and avoid basements.

25. Pregunta 25 de 25

    Which patrol finding is a fire hazard you should report?

    • AA closed fire door
    • BCardboard boxes piled against a furnace room heater
    • CA fire extinguisher mounted on its hook
    • DA clear exit corridor
    Ver respuesta

    Respuesta: B. Cardboard boxes piled against a furnace room heater

    Combustibles near heat sources can start fires. Report and, if allowed, correct poor housekeeping.

Teclado: 1–4 para responder, Intro para la siguiente pregunta.