49. Which of the following substances must be
present to start a fire?
1. Oxygen
2. Heat
3. Fuel
4. All of the above
50. In the fire tetrahedron, how many components
are necessary for combustion?
1. One
2. Two
3. Three
4. Four
51. Flammable materials give off vapors. What is
the lowest temperature that these vapors burn
when a spark is applied?
1. Ambient temperature
2. Room temperature
3. Flash point
4. Ignition point
52. What term is used to describe the lowest
temperature at which spontaneous combustion
occurs?
1. Flash point
2. Ignition point
3. Ambient temperature
4. Room temperature
53. Heat from fire can be transferred by how many
methods?
1. One
2. Two
3. Three
4. Four
54. What method of heat transfer occurs when
heat moves from one body to another by direct
contact?
1. Conduction
2. Convection
3. Radiation
4. Reflection
55. What method of heat transfer occurs through
the motion of smoke, hot air, and heated
gases?
1. Conduction
2. Convection
3. Radiation
4. Reflection
56. What type of heat transfer occurs when heat
moves in all direction unless blocked?
1. Conduction
2. Convection
3. Radiation
4. Reflection
57. Which of the following agents should be used
to extinguish a class B fire?
1. Water
2. AFFF
3. PKP
4. Both 2 and 3 above
58. Which of the following agents should be used
to extinguish class A or D fires?
1. Water
2. AFFF
3. PKP
4. Both 2 and 3 above
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