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25 Cards in this Set
- Front
- Back
All fire extinguishers are classified according to the classes of fires on which they are _____.
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Effective |
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Combustion begins when a fuel is heated to its _____.
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ignition point |
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Which class of fire is depicted in the pictograph system by a flame and an electrical plug and socket?
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C (electrical) |
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Which class of fire involves combustible metals?
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Class D |
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Which class of fire is depicted in the pictograph system by a flame and gasoline can?
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B |
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What is the most commonly used extinguishing agent for Class A fires?
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Water |
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Which statement best summarizes when a dry chemical extinguisher should be serviced and recharged?
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After any discharge |
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A Class B foam extinguisher is not rated for which fuel?
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Cooking oil |
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Which extinguishing method is being used when a foam blanket is placed over the surface of a burning liquid?
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Cutting off the oxygen supply |
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The hydrostatic test interval for a dry chemical extinguisher with a stainless steel shell is every ____ years.
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5 |
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The weight of carbon dioxide is about one and _______ the weight of air.
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one half |
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What is an advantage of portable fire extinguishers over hose lines?
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Faster Deployment |
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What residue does a CO2 fire extinguisher leave when discharged?
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none |
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When approaching a fire with an extinguisher in hand, you should always have a(n)_____.
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exit route |
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What is the term for a water-soluble flammable liquid?
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Polar solvent |
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Which statement about foam fire extinguishers is correct? "Class B foam extinguishers may be used to some effect on Class ___ fires."
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A |
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Which statement about the numerical rating of a Class K extinguisher is correct?
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There is no numerical rating for a Class K extinguisher.
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In general, the maximum reach of a CO2 extinguisher is ____ feet.
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8 |
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A portable fire extinguisher is bested suited for which situation?
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Fire in a wastebasket |
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The “P” in the acronym PASS, used in reference to fire extinguisher operation, stands for _____.
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Pull |
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What does it mean when a fire extinguisher has a pictograph with a red slash through it?
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Use on that class of fire could be hazardous
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Which feature of some carbon dioxide extinguishers makes them dangerous for use on Class C fires?
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metal horn |
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What is the best way to extinguish a Class C fire? "Shut off the power and treat is a Class __ and Class ___."
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Class A and Class B |
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What is the term for the substance that puts out the fire?
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Dry Charge |
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A Class A fire extinguisher with a numerical rating of 2 contains ___ gallons of water.
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2.5 gallons |