Chapter 7 - Fire Extinguishers Latest Update Graded A+

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 D) 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 B) 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 D) 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 : Fundamentals of Fire Fighter Skills, Fourth Edition, page 238 C) Yes, there may be more than one type of combustible. What is another word for the point at which a material begins to burn? A) Flash point B) Evolution temperature C) Liquefaction temperature D) Ignition temperature Feedback : Fundamentals of Fire Fighter Skills, Fourth Edition, page 232 D) Ignition temperature What is the body of a portable fire extinguisher called? A) The bell B) The horn C) The agent D) The cylinder Feedback : Fundamentals of Fire Fighter Skills, Fourth Edition, page 239 D) The cylinder 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 A) 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 D) Ammonium phosphate What one characteristic makes an extinguishing agent suitable for fighting Class C fires? A) It must absorb more heat than water does.