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FF 1 Chapter 7
Portable Fire extinguishers
| Question | Answer |
|---|---|
| 67. Portable fire extinguishers should be chosen based on the: A. heat of the fire. B. type of fuel that is burning. C. amount of agent required to extinguish the fire. D. distance required between the extinguisher and the fire. | B. type of fuel that is burning. |
| 68. What classification of portable fire extinguisher is used for fires that involve combustible liquids and gases? A. Class A B. Class B C. Class D D. Class K | B. Class B |
| 69. What classification of portable fire extinguisher is used for fires that involve combustible metals and alloys? A. Class A B. Class B C. Class D D. Class K | C. Class D |
| 70. What classification of portable fire extinguisher is used on fires that involve combustible cooking oils? A. Class A B. Class B C. Class D D. Class K | D. Class K |
| 71. Which method of extinguishing works by excluding oxygen from the burning process? A. Cooling B. Smothering C. Saponification D. Chain breaking | B. Smothering |
| 72. What expelling mechanism works when the operator physically applies pressure to a pump that increases pressure within the container? A. Scoop B. Manual pump C. Stored pressure D. Pressure cartridge | B. Manual pump |
| 73. What type of portable fire extinguisher is intended primarily for ground cover fires? A. Clean agent B. Pump-type water C. Aqueous film forming foam D. Wet chemical stored-pressure | B. Pump-type water |
| 74. What type of portable fire extinguisher uses air stored in the tank to force water up a siphon tube when operated? A. Clean agent B. Pump-type water C. Carbon dioxide (CO2) D. Stored-pressure water | D. Stored-pressure water |
| 75. What type of portable fire extinguisher is intended for use on Class K fires? A. Clean agent B. Pump-type water C. Aqueous film forming foam D. Wet chemical stored-pressure | D. Wet chemical stored-pressure |
| 76. The resulting foam from an aqueous film forming foam (AFFF) extinguisher will ___ fuels lighter than air. A. mix in with B. float on the surface of C. sink below the surface of D. cause a chemical reaction with | B. float on the surface of |
| What application method is used with an aqueous film forming foam (AFFF) extinguisher in order to prevent disturbing the fuel A. Apply foam directly to fuel surface B. Apply f in conjunction with dry ice crystals C. Allow f to gently rain down onto f | C. Allow f to gently rain down onto fuel surface |
| 78. What type of portable fire extinguisher is discharged in the form of gas and works on Class B and Class C fires? A. Clean agent B. Pump-type water C. Carbon dioxide (CO2) D. Wet chemical stored-pressure | C. Carbon dioxide (CO2) |
| 79. What type of portable fire extinguisher may produce a cloud that reduces visibility when discharged? A. Dry chemical B. Pump-type water C. Aqueous film forming foam D. Wet chemical stored-pressure | A. Dry chemical |
| 80. What type of portable fire extinguisher may be applied with either an extinguisher or a scoop? A. Dry powder B. Dry chemical C. Pump-type water D. Wet chemical stored-pressure | A. Dry powder |
| 81. What portable fire extinguisher rating is based on the approximate square foot (square meter) area of flammable liquid a non-expert operator can extinguish? A. Class A rating B. Class B rating C. Class K rating D. Multiple markings | B. Class B rating |
| 82. What portable fire extinguisher rating considers both the toxicity of the extinguishing agent and the toxicity of fumes produced when the agent is applied? A. Class A rating B. Class B rating C. Class C rating D. Class D rating | D. Class D rating |
| 83. On a multiple marking extinguisher the ratings for each class are: A. directly related to the others. B. only identified by pictographs. C. separate, they do not affect each other. D. indicators that firefighters should not use them. | C. separate, they do not affect each other. |
| Which statement BEST describes portable fire extinguisher selection A. Extinguisher ratings do not impact selection. B. The correct extinguisher will minimize risk to life and property. C. The correct extinguisher will always require an expert operat | B. The correct extinguisher will minimize risk to life and property. |
| 85. Once the proper extinguisher is selected, you must perform a visual inspection to ensure th extinguisher: A. has no external marks. B. is charged and operable. C. feels as though it contains agent. D. has a long enough hose to reach the fire. | B. is charged and operable. |
| 86. Once the proper extinguisher is selected, you must check to ensure the pressure gauge: A. is not clouded over. B. is in the operable range. C. has been properly inspected. D. records the last maintenance performed. | B. is in the operable range. |
| 87. The P in the PASS acronym stands for: A. squeeze handles. B. aim nozzle at base of fire. C. sweep nozzle back and forth. D. pull pin by breaking wire or seal. | D. pull pin by breaking wire or seal. |
| 88. Which of the following statements BEST describes how to prevent scattering of lightweight fuels? A. Wind may be used to allow the agent to reach the fuel surface. B. First allow fuel to burn off vapors before applying agent to the fuel surface. C | C. Apply the agent from point where it reaches, but does not disturb, the fuel surface. |
| 89. Signal to others that a portable fire extinguisher is empty by: A. laying it on its side. B. marking it with a tag. C. standing it straight up. D. covering the hose with a blanket. | A. laying it on its side. |
| 90. NFPA® 10 requires inspection of portable fire extinguishers at least: A. after every use. B. every three months. C. once every six months. D. once a year. | D. once a year. |
| 91. During inspection, if a portable fire extinguisher is found deficient in weight by ___ percent it should be removed from service and replaced. A. 5 B. 8 C. 10 D. 12 | C. 10 |
| 92. Do not remove the safety pin on a portable fire extinguisher until: A. ready to use the extinguisher. B. the fire appears to be dying out. C. ordered to by the commanding officer. D. you are 10 feet (3.04 meters) from the fire. | A. ready to use the extinguisher. |
| 93. How often should portable fire extinguishers be removed from service for maintenance? A. Monthly B. Bi-monthly C. Annually D. Bi-annually | C. Annually |
| What classification of portable fire extinguisher is used on fires that involve ordinary combustibles? | Class A |
| Fire Extinguisher | Portable fire fighting device designed to combat incipient fires. |
| Once the power supply is turned off in a class C fire it can be: | The fire can be treated as a Class A or B fire. |
| Dry Chemical | Extinguishing system that uses dry chemical as the primary extinguishing agent; often used to protect areas containing volatile flammable liquids. (used in class A-B-C fires) 🔥 |
| Dry Powder | Extinguishing agent suitable for use on combustible metal fires |
| Wet Chemical System | Extinguishing system that used a wet-chemical solution as the primary extinguishing agent. (range hoods, kitchens..) |
| Extinguishing Agent | Any Substance used for the purpose of controlling or extinguishing a fire. |
| Saponification | A phenomenon that occurs when mixtures of alkaline-based chemicals and certain cooking oils come into contact resulting in a soapy foam. |
| Which method of extinguishing works by interrupting the chemical chain reaction in the burning process? A. Smothering B. Cooling C. Saponification D. Chain Breaking | D. Chain Breaking |
| What expelling mechanism works using compressed inert gas that is contained in a separate cartridge on the side of the container? A. Scoop B. Manual Pump C. Stored Pressure D. Pressure cartridge | D. Pressure cartridge |
| What type of portable fire extinguisher uses deionized water as an agent and can be used on Class C fires A. Pump type water B. CO2 C. Water-mist Stored-pressure D. Wet chemical stored pressure | C. Water-mist Stored-pressure |
| Water-mist | In the fire service, water mist is associated with a fire extinguisher capable of atomizing water though a special applicator. Water-mist extinguishers use distilled water, while backpack pump-type use ordinary water. |
| What type of portable fire extinguisher was developed to replace halogenated extinguishing agents? A. Clean Agent B. Pump-type water C. CO2 D. wet-chemical stored-pressure | A. Clean Agent |
| Deionized Water | Water from which ionic salts, minerals, and impurities have been removed by ion-exchange. |
| Air-Aspirating Foam Nozzle | Foam nozzle especially designed to provide the aeration required to make the highest quality foam possible; most effective appliance for the generation of low expansion foam. |
| Halogenated Extinguishing Agents | Chemical compounds (halogenated Hydocarbons) that contain carbon plus one or more elements from the halon series. Halon 1301 and 1211 are most commonly used as extinguishing agents for Class B and C fires (Halogenated carbons) |
| Corrosive | Capable of causing corrosion bey gradually eroding, rusting, or destroying a material.. |
| What type of portable Fire extinguisher discharge is usually accompanied by dry ice crystals? A Clean Agent B. Pump-type water C. CO2 D. wet-chemical stored-pressure | C. CO2 |
| What type of portable Fire extinguisher was developed to control and extinguish fires involving Class D combustible metals? A. Dry powder B. Dry chemical C. Pump-type water D. Wet-chemical stored-pressure | A. Dry powder |
| what factors must be considered when determining if a portable fire extinguisher will be effective in extinguishing a fire? | -Classification of the burn fuel -extinguisher rating -Hazards to be protected -Size and intensity of the fire -Atmospheric conditions -Availability of trained personnel -ease of extinguisher handling -any life hazard or operational concerns |
| What does each step in the PASS acronym stand for? | P-pull pin breaking the thin wire seal A-aim the nozzle at the base of the fire S- Squeeze the handles together to release agent S-Sweep the nozzle back and forth to cover the burning material |
| List and then briefly define the classifications of portable fire extinguishers. | A) ordinary combustibles, Ex w/ Water, class A foam, or dry chemicals B) Liquid & Gases, ex w, Class B foam, Co2, Dry chemicals C) Electric , Ex w/ Dry Chemicals, Clean agent D) Metals, dry powder K) Cooking Fats/oils, wet chemical |
| List four types of portable fire extinguishers and then briefly describe what each is designed for. (345-348) | Pump-type Water Ext-Ground cover fires/class A Stored-pressure Water-Class A Water Mist Stored Pressure-Class A & C (deionized h2o) Wet Chem stored pressure- K AFFF- B Clean Agent-A, B, & C Co2-Class B & C Dry Chem-Class A-B-C Dry Powder-D |
| List the class ratings used for portable fire extinguishers and describe the test or qualifications each is based on. (351-352) | Class A) on the amount agent, Duration, & range . B) Approx SQ foot area of fire C) on not being an electric conductor D) toxicity of agent, of fumes produced and product of combustion, reactions between metal and agent K) SAPONIFICATION |
| What are the two goals used when selecting a portable fire extinguisher? (354) | Select extinguishers that minimize risks to life & property and are effective in extinguishing the fire. |
| List at least three factors that impact selecting portable fire extinguishers. (354) | -classification of burning fuel -rating of the extinguisher -Hazards to be protected -size and intensity -Atmospheric conditions -availability of personal -ease of handling -any life hazard or operational concerns |
Created by:
Toddgfunk