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Combustion involves the chemical reaction of a substance with oxygen, resulting in heat and light. Various fuels such as wood, coal, and LPG are used for different purposes, impacting both energy efficiency and environmental safety. The chapter also covers the conditions for combustion, types of flames produced, and methods for controlling fire, emphasizing safety measures and environmental considerations related to fuel consumption.
Chapter 413 sections
Combustion involves the chemical reaction of a substance with oxygen, resulting in heat and light. Various fuels such as wood, coal, and LPG are used for different purposes, impacting both energy efficiency and environmental safety. The chapter also covers the conditions for combustion, types of flames produced, and methods for controlling fire, emphasizing safety measures and environmental considerations related to fuel consumption.
Substances that burn in air are called combustible.
Oxygen (in air) is essential for combustion.
During combustion, heat and light are released.
The ignition temperature is the lowest temperature at which a combustible substance ignites.
Inflammable substances have low ignition temperatures.
Fire can be controlled by removing fuel, air, or heat.
Water is commonly used to extinguish fires, but not suitable for electrical or oil-related fires.
Different types of combustion include rapid combustion, spontaneous combustion, and explosions.
Flames have different zones: dark zone, luminous zone, and non-luminous zone.
An ideal fuel is inexpensive, readily available, highly combustible, and environmentally friendly.
A chemical process in which a substance reacts with oxygen, producing heat and light.
Materials that can burn to produce energy; commonly categorized as solid, liquid, or gas.
The lowest temperature at which a combustible material catches fire.
The amount of heat energy produced on complete combustion of 1 kg of a fuel, expressed in kilojoules per kilogram (kJ/kg).
Materials with a low ignition temperature that can easily catch fire.
Rain that has been made acidic by pollutants like sulfur oxides and nitrogen oxides.
The increase in Earth's average surface temperature due to rising levels of greenhouse gases.
Total Questions
2
Estimated Time
4 min
Passing Score
70%
3 more questions available