2) The phase begins with the actual ignition and is usually limited to the original products of ignition.

3) The supply of oxygen has been depleted in the hot- phase.

4) Opening a window may be all that is required to ventilate during the phase. 

5) Ventilation on the side the fire attack can reduce rollover potential. 

6) Directing water toward the and room contents along with aggressive ventilation can reduce flashover potential.

7) Opening a door or window late in the hot-smoldering phase can cause a . 

8) Warning signs of backdraft include:  Smoke exiting small openings under pressure, black smoke becoming dense, -yellow, confinement, excessive heat, little or no visible flame, smoke leaving structure at intervals, muffled sounds, or sudden rapid movement of air inward when an opening is made. 

9) Warning signs of backdraft from inside the structure include:  windows rattling, flames becoming sickly in color or less lively, muffled noises, and fire diminishing before water is applied. 

10) If backdraft conditions are developing, leave as quickly as possible, if not possible, stay low and away from openings. 

11) Carbon is present in every fire.

12) Temperature is an indicator of .

13) The greater the activity, the more intense the heat and the higher the temperature. 

14) The Law of Heat states that "heat tends to flow from a warmer to a colder substance" and "the colder of the two bodies will absorb heat until both objects are the same temperature".

15) Asbestos is a and is extremely dangerous when airborne.

16) Nitrogen oxides are liberated in the combustion of plastics. 

17) is a strong lung irritant liberated from burning freon. 

18) Carbon is an asphyxiates by combining with hemoglobin 200 times more readily than does oxygen.

19) Particulates in smoke include:  , tar, dust, and fire gases. 

20) Most gases emitted by fire have a vapor density than 1.0. 

21) Fire gases return to level after a fire, making it important to wear SCBA during overhaul.

22) The factors that determine the fire gases given off are:  nature of the combustible, rate of heating, temperature of evolved gases, and concentration. 

23) is a strong respiratory irritant produced when polyethylene, wood, and natural materials smolder.

24) is used in the manufacture of pharmaceuticals, herbicides, and tear gas.  

25) Carbon is a colorless, odorless, nonflammable gas produces in free-burning fires. 

26) Carbon dioxide can asphyxiate by excluding oxygen from a space as well as increase inhalation of toxic gases by increasing . 

27) Carbon monoxide is a , tasteless, odorless gas present in every fire.

28) The darker smoke is, the carbon monoxide being produced.

29) Carbon monoxide combines times more readily than oxygen to hemoglobin, resulting in inadequate oxygen perfusion. (use number)

30) Hydrogen is a colorless, very pungent, irritating gas produces when plastics, containing chlorine, burn.

31) Hydrogen is a colorless gas with an almond odor that is 20 times more toxic than carbon monoxide. 

32) Hydrogen is an almond odor asphyxiant that is skin absorbable.

33) Wool, silk, and -containing products give off hydrogen cyanide when they burn. 

34) Nitric oxides, which are reddish brown or color, are liberated from burning pyroxylin plastics.

35) Nitric oxides convert to nitrogen in the presence of oxygen, which is a pulmonary irritant. 

36) is a highly toxic, colorless gas with a odor of musty hay.

37) When contacts flame, it produces phosgene gas that is a strong lung irritant.

38) The process of gases rising until they reach the top of a space, spreading out laterally, then banking down is termed . 

39) A pressure differential is a pressure area at the bottom of a space created by the upflow of fire gases.

40) Horizontal layers of different temperature levels within a space is termed thermal . 

41) An is when smoke rises until the temperature of the air equals the smoke temperature, then spreads out laterally in a horizontal layer. 

42) Sulfur dioxide, large quantities of carbon dioxide, and oxygen-deficient atmospheres are hazardous -fire gases found in most communities. 

43) Methane, hydrogen, and acetylene are -than-air gases. 

44) Chlorine, and carbon dioxide are -than-air gases. 

45) Pressure transfers from an area of higher pressure to areas of lower pressure until pressures are . 

46) pressure planes are points within structures, usually midpoint vertically, in which the pressure of internal and external spaces are equal. 

47) The effect is the inward pull of air at the bottom of a space due to negative pressure which is created by convected smoke and heat to upper portions which creates a positive pressure at the top of the space. 

48) Dilution rate is affected by volume of air moved, placement of fan (if used), size of openings, and availability of air. 

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