Factories have long chimneys as they have a special device called as electrostatic precipitator installed inside the chimneys
. Electrostatic precipitators act as emission control units which trap dust particles, soot particles from the gases that are ready to be released out of the chimneys.
What is the role of long chimneys in factories Class 6?
What is the role of long chimneys in factories? Answer:
Burning of fuel takes place
in factories, it produces smoke which contains a few harmful gases and fine dust particles. The chimneys in factories take the harmful smoke and gases away from us.
Why did Factories have tall chimneys?
Long chimneys
take the harmful smoke and gases produced
in the factories high up in the air so as to reduce its harmful effects on the ground.
What were factory chimneys used for?
Industrial chimneys are vertical constructions created
to reduce the impact of greenhouse gases and other industry substances on its immediate surroundings
. These stonework (brick), concrete, or steel structures are used to eject gases generated by industries after completing their production processes.
Why are chimneys installed in the city?
and
poisonous gases into the air
. In order to prevent all this from taking place, nowadays filters are being attached in those chimneys which trap harmful and poisonous substances in the air being emitted outside by the chimneys. …
What are the characteristics of air class 6?
- Air is colourless. It is not visible.
- Air can be felt when it moves fast. Moving air is called as wind.
- Air occupies space. Air is present everywhere. Air can be displaced by water.
- Air exerts pressure.
- Air can be compressed and filled into a container.
What is the composition of air class 6?
Answer: Air is a mixture of
79% nitrogen, 20% oxygen, 1% carbon dioxide, water vapours and some other gases
. Air also contains dust particles.
What is the importance of air for Class 6?
Air is needed by all living things
, we cannot see air but we can feel it. Air in motion is called wind. Air occupies space, air has weight and it is present in water and soil. Air is the mixture of gases like oxygen, nitrogen, carbon dioxide, water vapours and other gases.
How were factory chimneys built?
Chimneys in ordinary dwellings were first built of wood and plaster or mud. Since then chimneys have traditionally been
built of brick or stone
, both in small and large buildings. Early chimneys were of simple brick construction. Later chimneys were constructed by placing the bricks around tile liners.
What is the tallest smokestack in the world?
The GRES-2 Power Station (or Power Station Ekibastuz)
is a coal-fueled power generating station in Ekibastuz, Kazakhstan. GRES-2, commissioned in 1967, has installed capacity of 1,000 MWe and has the world’s tallest flue-gas stack at 419.7 metres (1,377 ft) high.
What did people use before chimneys?
Before the chimney,
smoke from the fire set on a clay or brick surface in the center of the house
would fill the house, escaping either through a hole in the roof or a hole in the wall made for that purpose. Most enclosed houses remained smoke filled buildings.
Why chimney is used in boiler?
A Chimney is a
self standing structure for venting hot gases from a boiler to the outside atmosphere
[1] and to disperse them at a considerable height.
Why chimneys are tapered?
Due
to reduction in surface area
, this translates to less loading for the base to counteract, and overall reduces the stress. Typical stack design of this construction is to size the top for optimal velocity, and make that the wind design.
Why are factory chimneys red and white?
The color seems appropriate because of it’s
reflective index which prevents absorption of solar radiation keeping
the external tower cooler. Towers are commonly painted red and white to increase their visibility, which is a good precaution for aircraft.
What are the 4 properties of air?
- Air takes up space.
- Air has mass.
- Air is affected by heat.
- Air exerts pressure.
- Air can be compressed.
- Air is affected by altitude. Related questions.
What is dust and smoke for Class 6?
Dust/Smoke. Dust is
the small particles suspended freely in the air
. Smoke is made up of water vapour and gases which pollute the air.
