IGNOU MPA-002 Solved Question Paper PDF Download

IGNOU MPA-002 Previous Year Solved Question Paper in Hindi

IGNOU MPA-002 Previous Year Solved Question Paper in English

Q1. Briefly discuss the various types of man-made disasters.

Ans. Man-made disasters are catastrophic events that are caused by human actions, errors, intent, or the failure of man-made systems. Unlike natural disasters, their origin lies in human activities. These disasters can be broadly classified into the following categories: 1. Technological Disasters: These disasters arise from the failure of technology and industrial activities.

• Industrial Disasters: These occur in factories and industrial plants, involving leaks of hazardous materials, fires, or explosions. For example, the 1984 Bhopal Gas Tragedy , which involved the leak of Methyl Isocyanate gas.
• Transport Accidents: This includes train, airplane, ship, or road vehicle accidents that result in a large-scale loss of life and property. Examples include plane crashes or the sinking of oil tankers.
• Structural Failures: This involves the collapse of bridges, buildings, dams, or mines, often due to poor design, construction, or maintenance. For example, the Morbi bridge collapse.
• Nuclear Disasters: These are caused by accidents at nuclear power plants, leading to the release of radioactive radiation. Examples: The Chernobyl (1986) and Fukushima (2011) disasters.

2. Social/Intentional Disasters:

These disasters are the result of deliberate human actions.

• Terrorism: This involves the use of violence to create fear and achieve political goals. For instance, the 26/11 Mumbai attacks.
• War and Civil Conflict: Armed conflicts lead to mass destruction, displacement, and humanitarian crises.
• Riots and Civil Unrest: Violent clashes resulting from social or political tensions cause loss of property and life.

3. Environmental Degradation-related Disasters:

Although these might seem like natural processes, they are exacerbated by human activities.

• Deforestation and Landslides: The cutting of trees loosens the soil, increasing the risk of landslides during heavy rainfall.
• Pollution-based Disasters: Severe pollution of air, water, and soil can lead to epidemics, health crises, and ecological collapse. For instance, the destruction of marine ecosystems by oil spills.
• Coal Fires: Mining activities can ignite seams of coal, which can burn for decades, leading to land subsidence and air pollution.

In summary, man-made disasters are complex and are often a result of a combination of technology, social factors, and environmental mismanagement. Their management requires strong regulatory frameworks, better safety systems, and effective emergency response plans.

Q2. Describe the causes and impacts of chemical disasters and explain the lessons learnt from Bhopal Gas Tragedy.

Ans. Chemical disasters are the uncontrolled release, fire, or explosion of hazardous chemicals, posing a severe threat to human health, the environment, and property. These disasters often occur in industrial zones but can also happen during transportation. Causes of Chemical Disasters:

• Technological Failure: Malfunctioning equipment, pipeline ruptures, or leaks in storage tanks.
• Human Error: Inadequate training, failure to follow safety protocols, or negligence.
• Improper Storage and Disposal: Unsafe storage of hazardous chemicals or their illegal disposal.
• Transportation Accidents: Accidents that occur during the transportation of chemicals by road, rail, or sea.
• Natural Disasters: Natural events like earthquakes or floods can damage chemical plants, leading to a release.
• Deliberate Acts: Sabotage or terrorism.

Impacts of Chemical Disasters:

• Health Impacts: Immediate effects include death, burns, severe respiratory problems, and eye irritation. Long-term effects include cancer, congenital birth defects, neurological disorders, and other chronic illnesses.
• Environmental Impacts: Contamination of soil, groundwater, and surface water; destruction of aquatic life and vegetation; and air pollution.
• Economic Impacts: Destruction of property, loss of livelihoods, high cleanup costs, and disruption of economic activities in the affected area.
• Socio-psychological Impacts: Displacement of communities, fear, stress, and long-term psychological trauma.

Lessons Learnt from the Bhopal Gas Tragedy (1984):

The leak of

Methyl Isocyanate (MIC)

gas from the Union Carbide India Limited (UCIL) pesticide plant on the night of December 2-3, 1984, killed thousands of people. It is the world’s worst industrial disaster. The following crucial lessons were learned from it:

• Stringent Industrial Safety Laws: The tragedy highlighted the urgent need for strict safety rules and regulations for hazardous industries. This resulted in laws in India such as the Environment (Protection) Act, 1986 , and the Public Liability Insurance Act, 1991.
• Proper Land-Use Planning: Hazardous industries must be sited away from densely populated areas.
• Corporate Accountability: Companies must be held fully accountable for the safety and operation of their industrial units.
• Community Right-to-Know: Local communities should have the right to know about the hazards present in nearby industries and the emergency plans.
• Effective Emergency Response: There is a need for well-prepared disaster management plans at the local, state, and national levels for swift and coordinated action in case of a disaster. The response in Bhopal was slow and chaotic.
• Long-term Rehabilitation: Victims require not just immediate relief but also long-term medical care, psychological support, and economic rehabilitation.

Q3. Discuss briefly the various types of building fires.

Ans. Building fires are a common man-made disaster that pose a severe threat to life and property. They can be classified into various types based on the source of the fire, the type of material burning, and the use of the building. 1. Classification based on Combustible Material (Classes of Fire): This classification is crucial for using the correct extinguishing agent.

• Class A: This is a fire involving ordinary combustible materials like wood, paper, cloth, and plastics. Water is typically used to extinguish them.
• Class B: This fire involves flammable liquids like petrol, diesel, oil, paint, and gases. Water should not be used; instead, foam, carbon dioxide (CO2), or dry chemical powder is used.
• Class C: This fire occurs in energized electrical equipment or live electrical circuits. Using water can be dangerous as it conducts electricity. Non-conductive agents like CO2 or dry powder are used for extinguishment.
• Class D: This is a fire in combustible metals such as magnesium, titanium, or sodium. They require special dry powders to extinguish.
• Class K / Class F: This fire involves cooking oils and fats in kitchens. Special wet chemical fire extinguishers are used to put them out.

2. Classification based on Building Type/Use:

• Residential Fires: These occur in homes and apartments. The main causes are cooking accidents, electrical short circuits, smoking, and heating equipment. The risk is high here as fires can start when people are asleep.
• Commercial Fires: These occur in offices, shopping malls, shops, and hotels. The risk is high due to the large number of people present and the storage of combustible materials. Faulty wiring and arson are common causes.
• Industrial Fires: These occur in factories and warehouses where large quantities of flammable chemicals, liquids, or other hazardous materials are stored. These fires pose a risk of explosions and toxic fumes.
• High-Rise Building Fires: Extinguishing fires and evacuating people from these buildings is particularly challenging. Smoke and fire can spread rapidly through stairwells and elevator shafts, making rescue operations difficult.

The main causes of fires include

electrical short-circuits

, cooking gas leaks, careless smoking, arson (deliberately setting a fire), and non-compliance with safety norms. Each type of fire requires specific prevention, preparedness, and response strategies.

Q4. Discuss the preparedness and response measures towards forest fires.

Ans. Forest fires, also known as wildfires, are a devastating disaster that causes severe damage to ecosystems, wildlife, and human settlements. While some fires occur naturally, most are caused by human activities. Managing forest fires requires comprehensive measures in both the preparedness and response phases. Preparedness Measures The goal of preparedness is to prevent fire incidents and to minimize their impact if they do occur.

• Prevention:
  • Public Awareness: Educating people about the causes and dangers of forest fires, such as properly extinguishing campfires and not throwing burning cigarettes.
  • Creation of Firebreaks: Strategically creating vegetation-free zones (firebreaks) in forests to stop the spread of fire.
  • Prescribed Burning: In a controlled manner, burning the dry leaves and shrubs accumulated on the forest floor before the dry season to reduce the amount of fuel available for an uncontrolled fire.
• Detection:
  • Watch Towers: Installing watch towers in high places to provide immediate information upon spotting smoke.
  • Satellite Monitoring: Using satellites and drones to monitor large forest areas and detect “hotspots”.
  • Ground Patrols: Regular patrols by forest personnel in sensitive areas during the fire season.
• Mitigation:
  • Forest Management: Regularly clearing dry and dead vegetation from forests.
  • Regulation: Imposing a ban on lighting fires in forests during the dry season.
  • Building Codes: Mandating the use of fire-resistant materials for construction of homes in areas near forests (Wildland-Urban Interface).

Response Measures

Once a fire starts, the main goal is to control and extinguish it as quickly as possible.

• Rapid Initial Attack: Immediately dispatching firefighting personnel and equipment to the scene upon receiving information about a fire, to extinguish it while it is still small.
• Containment Strategies:
  • Creating Firelines: Creating a trench by removing trees and vegetation in the path of the fire so that it cannot advance further.
  • Backfiring: Intentionally setting a small fire that burns towards the main fire to consume the fuel and stop the main fire in its tracks.
• Use of Resources:
  • Ground Crews: Firefighters use axes, shovels, and water hoses to fight the fire.
  • Aerial Support: Using helicopters and air tankers (water bombers) to drop water or fire-retardant chemicals from above. This is particularly effective in inaccessible areas.
• Emergency Management:
  • Incident Command System (ICS): Using a standardized command structure to establish coordination between different agencies and manage resources effectively.
  • Evacuation: Safely evacuating human settlements and communities in danger.

Effective management of forest fires is a continuous process that requires cooperation between the government, the forest department, and local communities.

Q5. Write short notes in about 200 words each on the following : 5+5 (a) Classification of communicable diseases (b) Impacts of coal fires

Ans. (a) Classification of communicable diseases Communicable diseases are illnesses that can be transmitted from one person to another or from animals to humans. They are caused by pathogenic microorganisms such as bacteria, viruses, fungi, or parasites. In disaster situations, especially where sanitation and clean water are compromised, the risk of these diseases spreading increases. Communicable diseases are primarily classified based on their mode of transmission:

• Airborne Diseases: These diseases spread through the air via droplets or dust particles released during coughing, sneezing, or talking. Examples: Tuberculosis (TB) , influenza, measles, and chickenpox.
• Waterborne and Foodborne Diseases: These are transmitted by drinking contaminated water or eating contaminated food. This is a common problem in post-disaster relief camps. Examples: Cholera , typhoid, hepatitis A and E.
• Vector-borne Diseases: These diseases are spread by insects or other organisms (vectors) that carry pathogens from one host to another. Examples: Malaria , dengue, and chikungunya spread by mosquitoes; plague spread by fleas.
• Direct Contact Diseases: These diseases are transmitted through direct physical contact with an infected person or animal, such as touching or sexual contact. Examples: HIV/AIDS , Ebola, and skin infections.

This classification helps public health officials to control outbreaks and develop specific prevention strategies (such as vaccination, mosquito control, or providing safe drinking water).

(b) Impacts of coal fires

A coal fire is a serious man-made disaster that occurs when underground coal seams or coal piles catch fire. These fires are often started by mining activities, spontaneous combustion, or human negligence and can burn for decades or even centuries. The

Jharia coalfield (Jharkhand)

in India is a notorious example. The impacts of coal fires are far-reaching and devastating:

• Environmental Impacts:
  • Air Pollution: The burning of coal releases large amounts of greenhouse gases (carbon dioxide, methane) and toxic gases (carbon monoxide, sulfur dioxide), which degrade air quality and contribute to climate change.
  • Land Subsidence: As the underground coal burns away, the ground above it collapses, causing damage to infrastructure like roads, buildings, and railway lines.
  • Water Pollution: Toxic chemicals generated by the fire can leach into groundwater, making it unfit for drinking and agriculture.
• Health Impacts: Breathing air laden with toxic gases and particulate matter causes severe respiratory diseases, heart problems, and other health issues in the local population.
• Economic Impacts: A valuable natural resource of coal is destroyed. Furthermore, the cost of controlling and extinguishing the fires is very high, and the destruction of property leads to huge economic losses.

Managing coal fires is extremely difficult and expensive, requiring advanced technology and long-term planning.

Q6. Write in brief on the causes and impacts of oil fire.

Ans. An oil fire is an extremely dangerous and destructive type of industrial fire resulting from the ignition of crude oil or refined petroleum products (like gasoline, diesel, kerosene). These fires can occur at oil wells, refineries, storage tanks, pipelines, and on oil tankers. Causes of Oil Fires: The causes of oil fires are often a combination of technical failures, human errors, and external factors.

• Technical Failure: Equipment malfunction, such as leaks in pipelines, valve failures, or cracks in storage tanks, can lead to an oil spill. This can ignite if an ignition source is nearby.
• Human Error: Non-adherence to safety procedures, inadequate maintenance, and mistakes made by personnel can lead to accidents. For example, not taking proper precautions during welding or other hot work.
• Ignition Sources: It only takes a spark to ignite oil vapors. This spark can come from electrical equipment, static electricity , vehicle engines, smoking, or lightning strikes.
• Transportation Accidents: Collisions or overturning of oil tankers (ships), rail cars, or trucks can result in massive oil spills and fires.
• Natural Hazards: Natural disasters like earthquakes or landslides can damage pipelines or storage facilities, leading to fires.
• Sabotage or Terrorism: Oil installations are often attractive targets for terrorists, who may deliberately cause explosions or fires.

Impacts of Oil Fires:

The impacts of oil fires are both immediate and long-term.

• Human Impact: The intense heat and explosions from these fires can cause severe burns, injuries, and immediate death. The thick, toxic smoke released by the fire (containing carbon monoxide and sulfur compounds) causes severe respiratory problems.
• Environmental Impact: Oil fires release large amounts of soot and pollutants into the atmosphere, causing severe air pollution. If the fire is associated with an oil spill, it can contaminate soil and water sources (rivers, lakes, oceans), causing immense damage to aquatic life and ecosystems.
• Economic Impact: Oil fires result in huge economic losses. This includes the loss of the valuable oil product, destruction of expensive facilities and equipment, and the massive cost of firefighting and cleanup efforts. Furthermore, production disruptions affect the supply chain.
• Impact on Infrastructure: The fire and explosions can destroy nearby buildings, roads, and other infrastructure.

Controlling oil fires is extremely difficult because water is often ineffective and can spread the fire. They require special firefighting agents like foam, dry chemicals, and specialized techniques to be extinguished.

Q7. Examine the various effects of air pollution.

Ans. Air pollution, caused by human activities such as the burning of fossil fuels, industrial processes, and agricultural practices, has far-reaching and detrimental effects on human health, the environment, and the economy. Its major effects are as follows: 1. Effects on Human Health: This is the most direct and severe impact of air pollution.

• Respiratory Diseases: Pollutants like Particulate Matter (PM2.5 and PM10), Sulfur Dioxide (SO2), and Nitrogen Oxides (NOx) can penetrate deep into the lungs, causing or aggravating diseases like asthma, bronchitis, and reduced lung function.
• Cardiovascular Diseases: Long-term exposure to pollution can damage blood vessels, increasing the risk of heart attacks, strokes, and high blood pressure.
• Cancer: Some air pollutants, such as benzene and asbestos, are carcinogenic (cancer-causing) and increase the risk of lung cancer.
• Effects on the Nervous System: Heavy metal pollutants like lead and mercury can impair brain development in children and cause neurological disorders in adults.

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Other Effects:

Immediate effects such as irritation of the eyes, nose, and throat, headaches, and nausea are also common.

2. Environmental Effects:

• Acid Rain: When sulfur dioxide (SO2) and nitrogen oxides (NOx) combine with water in the atmosphere, they form sulfuric and nitric acids, which return to Earth as acid rain. It kills aquatic life by making lakes and rivers acidic, damages forests, and corrodes buildings and monuments (e.g., the yellowing of the Taj Mahal).
• Smog Formation: The reaction of nitrogen oxides and volatile organic compounds (VOCs) in the presence of sunlight forms ground-level ozone, which is the main component of smog. It reduces visibility and causes respiratory problems.
• Ozone Layer Depletion: Chemicals like chlorofluorocarbons (CFCs) destroy the ozone layer in the stratosphere, which protects us from the sun’s harmful ultraviolet (UV) rays.
• Effects on Flora and Fauna: Air pollutants can inhibit plant growth, reduce crop yields, and harm wildlife by accumulating in the food chain.

3. Climatic and Economic Effects:

• Climate Change: Greenhouse gases like carbon dioxide (CO2) and methane (CH4) trap heat in the atmosphere, leading to global warming and climate change.
• Economic Costs: Significant economic losses occur from the high cost of treating health problems associated with air pollution, reduced productivity due to illness, damage to crops, and loss of tourism (due to poor visibility).

In summary, air pollution is a complex problem that affects every aspect of our planet and requires urgent and concerted global action to control.

Q8. Explain the physical and chemical characteristics of water.

Ans. Water is an essential element for life, and its quality is determined by its physical and chemical properties. Changes in these characteristics often indicate pollution and can render water unsuitable for human use or aquatic life. Physical Characteristics of Water: These are properties that can be perceived by our senses or measured without any chemical analysis.

• Temperature: The temperature of water affects the metabolism and reproduction of aquatic organisms. The discharge of warm water from industrial plants (thermal pollution) can increase water temperature, which lowers dissolved oxygen levels and harms aquatic life.
• Color: Pure water is colorless. Color in water may indicate the presence of industrial wastes (like dyes), minerals, or algae.
• Odor and Taste: Pure water is odorless and tasteless. Any odor or taste may be the result of dissolved gases (like hydrogen sulfide), minerals, or decaying organic matter, indicating pollution.
• Turbidity: This is the cloudiness or haziness of water caused by suspended particles such as clay, silt, or microorganisms. High turbidity prevents sunlight from penetrating the water, hindering photosynthesis in aquatic plants, and can shelter pathogens.
• Solids: This includes Total Dissolved Solids (TDS) and Total Suspended Solids (TSS). TDS measures the amount of dissolved salts and minerals in water, while TSS measures the particles that remain suspended in the water.

Chemical Characteristics of Water:

These properties relate to the chemical composition of water and are crucial for assessing water quality.

• pH Value: This is a measure of the acidity or alkalinity of water. A pH range of 6.5 to 8.5 is ideal for most aquatic life. Industrial discharges and acid rain can alter the pH, making the water toxic to aquatic life.
• Dissolved Oxygen (DO): This is essential for the survival of fish and other aquatic organisms. When organic waste (like sewage) decomposes in water, bacteria consume DO in the process, leading to a drop in DO levels and the death of aquatic life.
• Biochemical Oxygen Demand (BOD): This is a measure of the amount of oxygen required by microorganisms to decompose the organic waste present in water. A high BOD means there is more organic pollution in the water.
• Hardness: This is caused by the concentration of calcium and magnesium ions in the water. Very hard water can cause scale buildup in pipes and does not lather well with soap.
• Chemicals and Nutrients: An excess of nutrients like nitrates and phosphates in water can cause excessive growth of algae (eutrophication). The presence of heavy metals (like lead, mercury) and pesticides makes water toxic for humans and animals.

Q9. Discuss the causes of deforestation.

Ans. Deforestation refers to the permanent removal of forests to convert the land for other uses, such as agriculture, urbanization, or infrastructure. It is a serious environmental issue that contributes to biodiversity loss, climate change, and soil erosion. The causes of deforestation are complex and can be divided into direct and indirect causes. Direct Causes: These are the human activities directly responsible for cutting down trees and clearing forests.

• Agricultural Expansion: This is the single largest driver of deforestation. To meet the food demand of a growing population, large forest areas are cleared for crops (like palm oil, soy) and for cattle ranching. This includes “slash-and-burn” agriculture practiced by small-scale farmers.
• Logging: Commercial logging for timber and paper products is a major cause. While sustainable logging practices exist, illegal and unregulated logging lead to widespread forest destruction.
• Infrastructure Development: The construction of roads, highways, dams, railway lines, and airports often requires clearing large tracts of forest. Roads provide further access into forests, promoting more deforestation.
• Urbanization and Population Expansion: As cities and towns grow, surrounding forests are cut down to make space for housing and urban amenities.
• Mining and Oil Extraction: Forest land is cleared to extract minerals, oil, and gas. The mining process not only removes trees but also pollutes the surrounding area.

Indirect or Underlying Causes:

These are the social, economic, and political factors that drive the direct causes.

• Population Growth: A growing population means an increasing demand for food, housing, and resources, which puts pressure on forests.
• Poverty: Poor rural communities often have no choice but to depend on forests for their livelihood. They cut down trees for fuelwood, fodder, and land for subsistence farming.
• Market Demand: Global demand for commodities like timber, paper, beef, soy, and palm oil encourages companies to clear forests to increase production.
• Government Policies and Lack of Governance: Weak forest laws, corruption, and insecure land tenure promote illegal logging and land encroachment. Sometimes, governments themselves encourage deforestation by providing subsidies for agriculture or development projects.
• Climate Change: Climate change-induced events like droughts and forest fires can also contribute to the destruction of forests.

Addressing deforestation requires more than just planting trees; it needs a multi-faceted approach to tackle the underlying issues of poverty, governance, and global consumption patterns.

Q10. Describe the causes and impacts of air accidents.

Ans. Air accidents, although rarer than other modes of transport, are considered severe man-made disasters due to their catastrophic nature and high fatality rates. The causes of these accidents are multi-faceted, and their impacts are extensive. Causes of Air Accidents: Air crashes are seldom caused by a single factor; they are often the result of a chain of events. The main causes include:

• Human Error: This is the most common cause of air accidents, contributing to over 50% of cases. It includes:
  • Pilot Error: This involves poor decision-making, not following procedures, fatigue, or lack of situational awareness.
  • Air Traffic Control (ATC) Error: Giving incorrect instructions, failing to maintain adequate separation between aircraft, or miscommunication.
  • Maintenance Error: Improper maintenance or inspection of the aircraft, leading to in-flight failure.
• Mechanical Failure: This accounts for about 20% of accidents. It includes engine failure, structural defects (like metal fatigue), malfunction of hydraulic or electrical systems, and landing gear problems.
• Weather: Adverse weather conditions are a factor in about 10% of accidents. This includes severe turbulence, thunderstorms, lightning, heavy snow or icing, and wind shear (a sudden change in wind speed and direction).
• Sabotage or Terrorism: This involves placing a bomb on the aircraft, hijacking, or a missile attack from the ground. While rare, the consequences are devastating, as seen in the 9/11 attacks.
• Other Causes: These include bird strikes that can damage engines, runway incursions (collisions with other aircraft or vehicles on the runway), and flaws in the aircraft’s design.

Impacts of Air Accidents:

• Human Impact: The survival rate in air crashes is often low, leading to a high number of fatalities among passengers and crew. Survivors and families of victims face severe physical injuries and deep psychological trauma.
• Economic Impact: An aircraft costs millions of dollars, and its destruction is a massive financial loss. Additionally, the costs of investigation, debris removal, and legal claims are very high. Accidents damage an airline’s reputation, leading to a loss of passenger confidence and a drop in revenue. Insurance premiums also increase.
• Regulatory and Social Impact: After every major accident, intensive investigations are conducted to develop new safety regulations and procedures to prevent future incidents. Accidents can create a public fear of flying and lead to more stringent scrutiny of the aviation industry.

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Environmental Impact:

Spills of jet fuel and other fluids from the wreckage can cause localized soil and water pollution at the crash site. However, this impact is usually less widespread compared to major industrial spills.

Because of these impacts, the aviation industry places an extreme focus on safety, constantly improving technology, training, and regulations to prevent accidents.