LITERA VALLEY SCHOOL , PATNA
CLASS-5/EVS/ONLINE NOTES-2/DECEMBER-
202O
LESSON-19
FUEL
CHARACTERISTICS OF FUEL
What are the characteristics of an ideal fuel?
1. It should possess high calorific value.
2. It should have proper ignition temperature. The
ignition temperature of the fuel should neither
be too low nor too high.
3. It should not produce poisonous products during
combustion. In other words, it should not cause
pollution o combustion.
4. It should have moderate rate of combustion.
CALORIFIC VALUE-
Calorific value is the amount of heat energy
present in food or fuel and which is determined
by complete combustion of specified quantity at
constant pressure and in normal conditions.
COMBUSTION-
: an act or instance of burning Smoke is produced
during combustion.
: a usually rapid chemical process (such as oxidation) that
produces heat and usually light.
IGNITION TEMPERATURE
The lowest temperature at which a combustible substance
when heated (as in a bath of molten metal) takes fire in air
and continues to burn —
DIFFERENT TYPES OF FUELS
SOLID FUELS
LIQUID FUELS
GASEOUS FUEL
Fuels
Most of the substances used for burning are fuels.
Substances that produce heat and light energy on
burning are called fuels. Some commonly used fuels are
wood, coal, cow dung cakes, kerosene, LPG, petrol, and
diesel. We use fuels for cooking, heating, in
automobiles, and for the generation of electricity. Based
on their physical state, fuels can be classified as solid,
liquid, or gaseous.
Types of fuels
Solid fuels Liquid fuels Gaseous fuels
Fuels that exist in
Fuels that exist in Fuels that exist in
solid state at room
liquid state at gaseous state at
temperature are
room temperature room temperature
called solid fuels.
are called liquid are called gaseous
Wood, charcoal,
fuels. Kerosene, fuels. Petroleum
cow dung cakes,
petrol, diesel, and gas, natural gas,
agricultural waste,
fuel oil are some and biogas are
and coal are
examples of liquid examples of
examples of solid
fuels. gaseous fuels.
fuels.
