MEV 002 Solved Assignment 2022-23

MEV 002 Solved Assignment 2022-23, MEV 002 Solved Assignment 2022-23, MEV 002 Assignment 2022 , FREE MEV 002 Assignment , IGNOU Assignments 2022-23- Gandhi National Open University had recently uploaded the assignments of this session for the year 2022-23. Students are recommended to download their Assignments from this webpage itself. MEV 002 Solved Assignment 2022-23 They don’t need to go anywhere else when everything regarding the Assignments are available during this text only.

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MEV 002 Solved Assignment 2022-23

MEV 002

  ENVIRONMENTAL AND OCCUPATIONAL HAZARDS

ASSIGNMENT 2022 – 2023

Attempt any five questions. All questions carry equal marks. 5x20=100

1. Differentiate hazard and disaster. Classify the various types of chemical hazards with suitable examples.

A volcano is an opening in the earth's crust through which magma, gases and ash are released to the earth's surface. The molten rock material found in the interior of the earth is called magma. It can be noted that when magma reaches the earth’s surface, it is known as lava Vent is an opening or mouth of a volcano. Fumaroles are the gushing fumes through the gap in the volcano. Crater is a saucer shaped depression in the mouth of a volcano. When the crater is widened, it is called as Earthquake,Iran-Iraq border, 2017 Caldera. Volcanic ash consists of fragments of pulverized rock, minerals and volcanic glass, created during volcanic eruptions. Volcano generally erupts either through the vent (E.g. Mt. Fujiyama, Japan) or fissure (The Deccan Plateau, India).

Causes of Volcanic Eruptions

The following are the causes of volcanic eruptions: Weak Zones in the Earth Crust: The parts of the earth where two tectonic plates collide against or drift apart from each other are considered very weak. Volcanoes may erupt in such zones, for example, African and Eurasian plates. Magma Saturated with Gases: The magma, in the interior of the earth, is often found saturated with gases like carbon dioxide, and hydrogen sulfide. These gases together with water vapour make the magma highly explosive. Magma is forced out as lava on the surface of the earth due to the pressure exerted by these gases.

Types of Volcanoes Based on the frequency of eruption, there are three types of volcanoes:

1. Active Volcanoes: Volcanoes which erupt frequently are called active volcanoes. Generally, their vent remains open. Mount Etna of Italy, Cotopaxi in Ecuador are some examples.

2. Dormant Volcanoes: These volcanoes may not have erupted in the recent past but there is a possibility of eruption at any time. In other words, they may lie dormant awaiting active eruption anytime. Sometimes gases and steam come out of them. They cause great destruction to life and property once they become active again. Mt. Vesuvius of Italy and Mt. Fujiyama of Japan are examples.

3. Extinct Volcanoes: These volcanoes have exhausted their energy and have not erupted during the known geological period. The vent of these volcanoes remains closed with solidified lava. The formations such as craters may be filled with water and crater lakes may be formed. The slopes of these landforms may be covered with vegetation. Popa in Myanmar and Mt. Kenya in eastern Africa are the examples of extinct volcano.

On the basis of nature of eruption and form developed on the surface, they are classified into following types:

1. Shield Volcanoes: These are made up of basalt, a type of lava that is very fluid when erupted. They become explosive when water gets into the vent. They develop into a cinder cone. Hawaiian volcano is an example of this category.

2. Composite cone volcanoes: They are also called 'strato volcanoes'. They are cone-shaped volcanoes composed of layers of lava, ash and rock debris. Mount Vesuvius and Mount St. Helens are examples of composite volcanoes.

3. Cinder Cone Volcano : It forms when magma is thrown out to the surface, cooled in to ash and cinders and settled around the mouth of volcano. It is less dangerous than other volcanoes.

4. Lava Dome: Unlike composite and shield volcanoes, lava domes are of significantly smaller structure. They are formed when the lava is too viscous to flow to a great distance. As the lava dome slowly grows, the outer surface cools and hardens as the lava continues to pile within. Eventually, the internal pressure can shatter the outer surface, causing loose fragments to spill down its sides.

Positive Effects of Volcanoes

Volcanism creates new landforms. Volcanic rocks yield very fertile soil upon weathering and decomposition. The Kimberlite rock of South Africa, the source of diamonds, is the pipe of an ancient volcano. In the vicinity of active volcanoes, waters in the depth are heated from contact with hot magma giving rise to springs and geysers. The Puga valley in Ladakh region and Manikaran (Himachal Pradesh) are promising spots in India for the generation of geothermal electricity.

2. Describe the causes, types, and impacts of volcanic hazards.

3. Define floods? Describe the causes and impacts of floods.

4. Explain the various psychological and ergonomic hazards faced in the health sector.

5. Describe the various health hazards faced by employees in the agricultural sector.

6. Write short notes on:

a) Ergonomic hazards.

b) Biological hazards.

7. Explain disaster management and its importance.

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Those students who had successfully submitted their Assignments to their allocated study centres can now check their Assignment Status. Along with assignment status, they can also checkout their assignment marks & result. MEV 002 Solved Assignment 2022-23 All this is available in an online mode. MEV 002 Solved Assignment 2022-23 After submitting the assignment, you can check you IGNOU Assignment Status only after 3-4 weeks. It might take 40 days to declare.

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MEV 002 Solved Assignment 2022-23 Once the TEE assignments are submitted to the Centres, it's send to the evaluation department. After which the evaluation of IGNOU Assignment Solutions takes place.

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