Define fuel and characteristics of fuel

 Define fuel and characteristics of fuel:

• Fuel is a substance that releases energy when burned.
• It can be in the form of solids, liquids, or gases.
• The most common fuels are derived from fossil fuels, such as coal, oil, and natural gas.

Characteristics of a good fuel include high energy content, low cost, availability, ease of storage and transport, and safety in handling and use.

• Other important characteristics of fuel are its flash point, volatility, and combustion efficiency.
• Flash point is the temperature at which a fuel ignites.
• Volatility refers to a fuel's ability to vaporize and form flammable mixtures with air.
• Combustion efficiency is a measure of how effectively a fuel is burned to release energy.