Portable Fire Extinguishers Questions and Answers Already Passed

Portable Fire Extinguishers Questions and Answers Already Passed What are the two primary uses of fire extinguishers? 1. To Extinguish INCIPIENT fires 2. To control fires where traditional methods of fire suppression are not recommended Name the advantage and disadvantage of the extinguisher. Advantage: portable Disadvantage: single use What is the weight of 1 gallon of water? 8.34 lbs What is the percentage of oxygen in the air? 21% What is the expansion rate of water to steam? 1700:1 What is the temperature at which water boils, freezes? Boil: 212F Freeze: 32F What are the classes of fire and and example of each? 1. class a ordinary combustible(wood) 2. class b flammable liquid (gasoline) 3. class c electrically charged (appliance plugged in) 4. class d combustible metal (sodium or magnesium) 5. class k cooking oil (cooking oil) Describe the label scheme for each extinguisher. 1. Class A: Green Triangle with an A in the center or a picture of ordinary combustibles. 2. Class B: Red Box with a B in the center or a picture of a tank of gas poured over a fire 3. Class C: Blue Circle with a C in the center or a picture of an electrical socket 4. Class D: Yellow Star with a D in the center, not picture 5. Class K: (some use a purple K), picture of a frying pan on fire. What is the Standard for Portable Fire Extinguishers? NFPA 10 Extinguishers weighing up to 40 lbs. should be mounted so that the top of the extinguisher is? not more than 5 ft. above the floor Extinguishers weighing more than 40 lbs should be mounted so that the top of the extinguisher is? not more than 3 ft above the floor The bottom of an extinguisher should be at least? 4 in. above the floor What is a fire load? The weight of combustibles in a fire area or on a floor in buildings and structures, including either the contents or the building pars, or both. Sometimes measured as the average weight of combustible materials per square foot of floor area. What are the 3 risk classifications of areas? 1.Light:the majority of materials are noncombustible or arranged so that fire is not likely to spread (church, offices, assembly halls) 2. Ordinary: Contain more Class A and