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Fire Inspector Chapter 3 questions with correct answers.
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Fire Inspector Chapter 3 questions withcorrect answers.
Which type of ignition occurs when a mixture of fuel and oxygen encounter an external heat source with
sufficient heat or thermal energy to start the combustion process? (79) ANS - Piloted ignition
Which type of heat transfer travels through vacuums and air spaces? (87) ANS - Radiation
Which of the following thermal properties of a compartment maintains temperature by absorbing and
releasing large amounts of heat slowly? (102) ANS - Retention
Which source of heat is generated by friction or compression? (82) ANS - Mechanical energy
Which stage occurs when the oxygen concentration falls to the point that flaming combustion is
diminished? (108) ANS - Decay
Which of the following refers to unintended resistance heating? (81) ANS - Overcurrent or overload
Which type of heat transfer occurs when a material is heated as a result of direct contact with a heat
source? (83) ANS - Conduction
Which of the following statements about fires originating in upper levels of a building is MOST accurate?
(101) ANS - They generally extend downward much more slowly.
Which of the following statements about thermal layering is MOST accurate? (104) ANS - Generally, the
hottest gases tend to be in the upper layers.
What stage occurs as the fire consumes the available fuel in the compartment and the heat release rate
begins to decline? (108) ANS - Decay
, Which element was added to the basic fire model to create the fire tetrahedron? (76) ANS -
Uninhibited chemical reaction
Materials that burn readily in oxygen-enriched atmospheres: (94) ANS - may not burn in normal oxygen
levels.
Which of the following refers to energy released per unit of time as a fuel burns? (88) ANS - Heat
release rate
Which of the following statements about combustible materials with high surface-to-mass ratios is
MOST accurate? (99) ANS - They are easily ignited and burn quickly.
What is the minimum concentration of fuel vapor and air that supports combustion? (94) ANS - Lower
flammable limit
Materials that absorb heat, but do not contribute fuel in the combustible reaction are known as: (87)
ANS - passive agents.
Which is an example of a hydrocarbon-based fuel? (87) ANS - Plastics
Which of the following statements about fires that develop beyond the incipient stage is MOST
accurate? (107) ANS - They become ventilation controlled.
Which of the following would extinguish a fire under the simplest model of fire behavior? (76) ANS -
Removal of oxygen
What is the temperature at which sufficient vapors are generated to sustain the combustion reaction?
(90) ANS - Fire point
Energy possessed by a moving object is known as: (78) ANS - kinetic energy.
Air contains approximately: (92) ANS - 21 percent oxygen.
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