The three components that must be present for a fire to start and sustain itself are ____________________, ____________________, and ____________________.
Fill in the blank(s) with the appropriate word(s).
fuel, heat, oxygen
fuel, oxygen, heat
oxygen, fuel, heat
oxygen, heat, fuel
heat, oxygen, fuel
heat, fuel, oxygen
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Which state is the leading producer of timber?
a. Washington c. Georgia b. Oregon d. Maine
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Technician A says that glow plugs are used to help start a diesel engine and are shut off as soon as the engine starts. Technician B says that the glow plugs are turned off as soon as a flame is detected in the combustion chamber. Which technician is correct?
A) Technician A only B) Technician B only C) Both Technicians A and B D) Neither Technician A nor B
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Green walls __________________.