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Chapter 7 - Fire Extinguishers Latest
Update Graded A+
When operating a fire extinguisher, the acronym PASS can be used to assist you in the steps. What does the acronym stand for? A) Point, aim, shoot, stream B) Point, arms length, sweep, side C) Push, aim, side, side D) Pull, aim, squeeze, sweep Feedback :
Fundamentals of Fire Fighter Skills, Fourth Edition, page 250 โโD) Pull, aim, squeeze, sweep
Why can dry chemical extinguishers be used on Class C fires? A) Because dry chemicals are chemically similar to water B) Because dry chemicals do not conduct electricity C) Because dry chemicals never actually touch the fuel D) Because dry chemicals are themselves electrically static Feedback :
Fundamentals of Fire Fighter Skills, Fourth Edition, page 234 โโB) Because dry chemicals do not conduct electricity
When should fire extinguishers on apparatus be inspected? A) Monthly B) Annually C) When there is evidence the extinguisher has been used D) Along with regular apparatus equipment checks Feedback :
Fundamentals of Fire Fighter Skills, Fourth Edition, page 258 โโD) Along with regular apparatus equipment checks
Is it ever appropriate to have two different types of fire extinguisher in the same area? A) No, this sets up the possibility of opposing streams. B) No, this risks laypeople selecting the wrong one. C) Yes, there may be more than one type of combustible. D) No, this is prohibited by the building code. Feedback :
If a fire extinguisher containing ammonium phosphate is used on a Class K fire, not only will it be ineffective, but it can actually worsen the problem. How? A) It can counteract the foaming properties of any alkaline agent applied to the fire. B) It will emit hydrogen cyanide gas, a deadly and penetrating poison. C) It will cause a rapid polymerization, resulting in a near-BLEVE expansion of the fuel. D) It can cause the fuel to heat up internally to reacquire its flash point. Feedback :
Fundamentals of Fire Fighter Skills, Fourth Edition, page 245 โโA) It can counteract the foaming properties of any alkaline agent applied to the fire.
What is one chemical used as a dry chemical extinguishing agent? A) Ammonium nitrate B) Trinitrotoluene C) Methyl isocyanate D) Ammonium phosphate Feedback : Fundamentals of Fire Fighter Skills, Fourth Edition, page 243 โโD) Ammonium phosphate
What one characteristic makes an extinguishing agent suitable for fighting Class C fires? A) It must absorb more heat than water does. B) It must absorb only minimal heat. C) It must not catalyze a polymer reaction. D) It must not conduct electricity. Feedback : Fundamentals of Fire Fighter Skills, Fourth Edition, page 234 โโD) It must not conduct electricity.
Which class of fire involves flammable or combustible liquids? A) K B) A C) B D) D Feedback : Fundamentals of Fire Fighter Skills, Fourth Edition, page 233 โโC) B
Why is the use of halon agents strictly controlled?
B) the occupancy type. C) the skill of the user. D) the building's history of fire. Feedback : Fundamentals of Fire Fighter Skills, Fourth Edition, page 236 โโB) the occupancy type.
Which class of fire would involve energized building wiring, fuse boxes, transformers, or generators? A) F B) E C) D D) C Feedback :
Fundamentals of Fire Fighter Skills, Fourth Edition, page 233 โโD) C
Which class of fire involves combustible metals? A) K B) A
C) B
D) D
Feedback :
Fundamentals of Fire Fighter Skills, Fourth Edition, page 234 โโD) D
What is one disadvantage of CO2 extinguishers? A) Electrical conductivity B) Expensive chemical inside C) Short discharge range D) Messy residue Feedback :
Fundamentals of Fire Fighter Skills, Fourth Edition, page 246 โโC) Short discharge range
What is the safest and surest way to extinguish a Class C fire? A) Drench it with copious amounts of water. B) Turn off the power and treat it as a Class A or Class B fire. C) Smother it with a treated carbon-fire blanket. D) Evacuate the air in the location of the fire.
Fundamentals of Fire Fighter Skills, Fourth Edition, page 247 โโB) Polar solvents
What is the significance of the C in the following fire extinguisher rating? 2-A:10-B:C A) It means that the agent contained therein is of the cyanoacrylate-base family. B) It means that this extinguisher can be used on energized electrical equipment. C) The lack of a number following the C means it is not suitable for use on any electrical fire. D) It means that the agent contained therein is of the carbon-tetrachloride base family. Feedback :
Fundamentals of Fire Fighter Skills, Fourth Edition, page 235 โโB) It means that this extinguisher can be used on energized electrical equipment.
Which class of fire involves ordinary combustibles, such as wood, paper, cloth, rubber, and some plastics? A) C B) B C) A D) 1 Feedback :
Fundamentals of Fire Fighter Skills, Fourth Edition, page 233 โโC) A
Besides putting out incipient fires, what is another use for portable fire extinguishers? A) Wetting exposures to keep them from igniting from radiated heat B) Controlling large flammable liquids fires that are not yet dammed or diked C) Controlling fires where traditional methods of suppression are not recommended D) Serving as an alternate forcible entry device through standard wooden residential doors Feedback :
Fundamentals of Fire Fighter Skills, Fourth Edition, page 231 โโC) Controlling fires where traditional methods of suppression are not recommended
All fires require three basic ingredients, one of which is fuel. What is another? A) Nitrogen B) Surfactant C) Water D) Heat Feedback :
Fundamentals of Fire Fighter Skills, Fourth Edition, page 232 โโD) Heat
Fire prevention programs encourage citizens to keep fire extinguishers in their homes, especially: A) in the garage. B) in the bedrooms. C) in the kitchen. D) near the exits. Feedback : Fundamentals of Fire Fighter Skills, Fourth Edition, page 230 โโC) in the kitchen.
Which class of fire is depicted in the pictograph system by a fire in a frying pan? A) A B) B C) C D) K Feedback : Fundamentals of Fire Fighter Skills, Fourth Edition, page 236 โโD) K
Which hazard category is represented by the following: auto showrooms, parking garages, and retail stores?
A) Severe B) Light C) Ordinary D) Extra Feedback :
Fundamentals of Fire Fighter Skills, Fourth Edition, page 237 โโC) Ordinary
What residue, if any, does a CO2 fire extinguisher leave when discharged? A) Powdered carbon dioxide B) It does not leave any residue. C) Selenium oxide D) Simple salt Feedback :
Fundamentals of Fire Fighter Skills, Fourth Edition, page 246 โโB) It does not leave any residue.
Which of the following is not an example of a light hazard environment? A) Self-storage
D) Dots and bar code Feedback :
Fundamentals of Fire Fighter Skills, Fourth Edition, page 234 โโB) Letters and numbers
What is the weight of carbon dioxide in comparison to air? A) 0. B) 1 C) 1. D) 2 Feedback : Fundamentals of Fire Fighter Skills, Fourth Edition, page 245 โโC) 1.
When approaching a fire with an extinguisher in hand, fire fighters should always have what behind them? A) An exit B) The wind C) A light source D) A backup extinguisher
Feedback : Fundamentals of Fire Fighter Skills, Fourth Edition, page 249 โโA) An exit
What is the substance called that is contained in a portable fire extinguisher and puts out the fire? A) Propellant B) Extinguishing agent C) Dry charge D) Anhydrous material Feedback : Fundamentals of Fire Fighter Skills, Fourth Edition, page 239 โโB) Extinguishing agent
How are occupancy use category and hazard classification related, if at all? A) They are not necessarily related. B) Occupancy determines hazard. C) Hazard determines occupancy. D) They are the same thing. Feedback :
Fundamentals of Fire Fighter Skills, Fourth Edition, page 236 โโB) B
What is the range of a 2.5-gallon water extinguisher expelled in a solid stream? A) 5-10 feet B) 15-20 feet C) 25-30 feet D) 35-40 feet Feedback :
Fundamentals of Fire Fighter Skills, Fourth Edition, page 241 โโD) 35-40 feet
Which of the following statements is accurate regarding fire extinguishers? A) Maintenance is required if the pressure exceeds 3000 psi. B) Servicing is not required if it was discharged for less than 5 seconds. C) 2.5-gallon, stored-pressure extinguishers cannot be recharged by fire fighters. D) Non-rechargeable extinguishers must be replaced after any use. Feedback : Fundamentals of Fire Fighter Skills, Fourth Edition, page 259 โโD) Non-rechargeable extinguishers must be replaced after any use.
Feedback :
All portable fire extinguishers use what means for expelling their contents? A) Springs B) Vacuum C) Pressure D) Gravity Feedback :
Fundamentals of Fire Fighter Skills, Fourth Edition, page 239 โโC) Pressure
What is the most common extinguishing agent for Class A fires? A) Water B) CO C) Dry chemical D) Carbon tetrachloride Feedback :
Fundamentals of Fire Fighter Skills, Fourth Edition, page 233 โโA) Water
