Скачать или смотреть Air Pollution Explained | SSC JE, RRB JE, ESE, GATE, PSU Exam Preparation

Air Pollution full explanation for SSC JE, RRB JE, ESE, GATE, PSU. Covers pollutants, control methods, smog, and PYQs in simple words.
air pollution for ssc je
air pollution for rrb je
air pollution for ese
air pollution for gate exam
air pollution explained in hindi
environmental engineering ssc je
air pollution control methods
particulate matter smog pollution
ssc je environment preparation
ese environmental engineering
gate environmental engineering notes
air pollution gyan
pollution engineering
ssc je pyq air pollution
rrb je air pollution question
gate pyq air pollution
air quality index explained
photochemical smog
greenhouse gases for exams
cpcb pollution act
#AirPollution
#SSCJEPYQ
#RRBJEPreparation
#ESE2025
#GATE2025
#PSUExam
#EnvironmentalEngineering
#PollutionControl
#SmogExplained
#GreenhouseEffect
#EngineerStyle
#StudyShorts
#AirQualityIndex
Here’s a complete, exam-focused Air Pollution note tailored for SSC JE, RRB JE, ESE, GATE, and PSUs — concise, conceptual, and full of facts you can revise quickly 👇

📘 AIR POLLUTION – Quick Revision Notes
🔹 Definition
Air pollution is the presence of harmful or excessive quantities of substances in the atmosphere which can harm humans, animals, vegetation, or materials.

🔹 Major Air Pollutants
Pollutant Source Harmful Effects
CO (Carbon Monoxide) Incomplete combustion (vehicles) Reduces oxygen carrying capacity of blood
NOx (Oxides of Nitrogen) Automobiles, thermal power plants Respiratory issues, acid rain
SO₂ (Sulfur Dioxide) Burning coal & oil Causes acid rain, respiratory issues
Particulate Matter (PM10, PM2.5) Dust, combustion, industrial waste Lung diseases, cancer
O₃ (Ozone) Secondary pollutant (sunlight + NOx + VOC) Eye irritation, damages crops
Lead (Pb) Leaded petrol, smelting industries Affects nervous system
Hydrocarbons (HC) Unburnt fuel, petrochemicals Carcinogenic, forms photochemical smog

🔹 Standards & Indices
National Ambient Air Quality Standards (NAAQS) – defined by CPCB (India)

AQI (Air Quality Index) – Indicates overall air quality
🟢 Good (0–50), 🔴 Very Poor (301–400), ⚫ Severe (401–500)

🔹 Effects of Air Pollution
✅ On Humans:
Asthma, bronchitis, lung cancer, irritation of eyes/nose

✅ On Environment:
Acid rain (due to SOx & NOx)

Global warming (CO₂, CH₄, etc.)

Ozone depletion (CFCs)

🔹 Air Pollution Control Techniques
Technique Used For
Electrostatic Precipitator (ESP) Particulate matter (dust)
Cyclone Separator Large dust particles
Bag Filter Fine dust
Scrubbers Gaseous pollutants (SO₂ etc.)
Catalytic Converter CO, NOx in vehicles

🔹 Important Formulas
Air Quality Index (Simplified):
𝐴
𝑄
𝐼
=
𝑃
𝑜
𝑙
𝑙
𝑢
𝑡
𝑎
𝑛
𝑡

𝐶
𝑜
𝑛
𝑐
𝑒
𝑛
𝑡
𝑟
𝑎
𝑡
𝑖
𝑜
𝑛
𝑆
𝑡
𝑎
𝑛
𝑑
𝑎
𝑟
𝑑

𝐿
𝑖
𝑚
𝑖
𝑡
×
100
AQI=
Standard Limit
Pollutant Concentration
​
×100

Stack Height Formula (ESE level):
𝐻
=
14
(
𝑄
)
0.3
H=14(Q)
0.3

Where,
H = Stack height (m), Q = SO₂ emission rate (kg/hr)

🔹 Key Acts and Organizations
Air (Prevention and Control of Pollution) Act, 1981

Central Pollution Control Board (CPCB)

MoEFCC – Ministry of Environment, Forest & Climate Change

🔹 Ozone Layer Facts (for GATE/ESE)
Stratosphere: Contains O₃ layer

CFCs destroy ozone → formation of “ozone hole”

Protected by: Montreal Protocol (1987)

🔹 Photochemical Smog (GATE Favorite)
Brown hazy fog in cities

Forms from NOx + HC + sunlight

Contains O₃, PAN, aldehydes – eye & lung irritants

🔹 Greenhouse Gases
Gas GWP (Global Warming Potential)
CO₂ 1
CH₄ 21
N₂O 310
CFCs 1000–10000

🔹 PYQs – Sample Questions
🧠 SSC-JE 2022: Which device is used to remove particulate matter from flue gases?
👉 Answer: Electrostatic Precipitator

🧠 GATE 2023: The main component of photochemical smog is
👉 Answer: Ozone

🧠 RRB JE: Which gas causes acid rain?
👉 Answer: SO₂ & NOx