Lesson 5 Flashcards
any solid, liquid, or gaseous substance that may be combusted
(burned) to produce heat or work.
Fuel
Fuel is a combustible substance, containing ____________ as main
constituent, which on proper burning in the presence of air, gives large
amount of heat which can be used economically for domestic and
industrial purposes.
Carbon
The use of coal as a fuel dates back to ancient civilizations,
where it was used to isolate copper from ore in _____________as early as
________
-northeastern
China
-1000 BC
The ____________ in the late 18th century sparked the
large-scale use of coal for steam engines and steelmaking.
Industrial Revolution
A fuel is considered valuable if:
It ignites easily at a __________ and produces a large quantity of
heat during its combustion.
Inexpensively isolated and have properties that allow for their safe and
efficient ___________
Fuel should leave ___________ behind after being burned, and produce
by- products that are not harmful to human health or the environment.
-low temperature
-storage or transport.
-little residue
Primary sources of fuel humans use now:
Coal
Petroleum products
Natural gas
Burning fossil fuels for energy fails to meet the criteria of sustainability in two
ways.
First, the fuels themselves are ____________. Once gone, they cannot be
replaced—at least within a useful timescale.
Second, the waste products of combustion have adverse effects on our
___________, both today and in the future.
-nonrenewable
-environment
Requirements to Generate a Fire:
Source of heat
Fuel
Oxidizer
The acronym PASS is used to describe these four basic steps in fire extinguisher.
Pull (Pin) Pull pin at the top of the extinguisher, breaking the seal. …
Aim. Approach the fire standing at a safe distance. …
Squeeze. Squeeze the handles together to discharge the extinguishing agent inside. …
Sweep
Fire blankets and carbon dioxide fire extinguishers are two effective methods of suffocating a fire and restricting its access to oxygen.
Fire blankets and carbon dioxide fire extinguishers are two effective methods of suffocating a fire and restricting its access to oxygen.
A good fuel should have a high ___________ i.e., it should evolve a large amount
of heat when it is burnt.
calorific value
According to the physical state in which they exist in nature – ________________
According to the mode of their procurement – ____________
-solid, liquid
and gaseous
-natural and manufactured
is a basic natural fuel.
Dark greenish brown, viscous mineral oil, found deep in earth’s crust.
petroleum
is generally associated with petroleum deposits and is obtained from
wells dug in the oil-bearing regions.
natural gas
refers to the amount of heat produced by unit volume of a
substance by complete combustion.
calorific value
