Comprehension
Read the given passage carefully and answer the following question :
Depending on the mode of occurence and the nature of the ore, mining is of two types : surface and underground mining. The surface mining is also known as open-cast mining is the easiest and the cheapest way of mining minerals that occur close to the surface. Overhead costs such as safety precaution and equipment is relatively low in this method. The output is both large and rapid.
When the ore lies deep below the surface, underground mining method (shaft method) has to be used. In this method, vertical shafts have to be sunk, from where underground galleries radiate to reach the minerals. Minerals are extracted and transported to the surface through these passages. It requires specially designed lifts, drills, haulage vehicles, ventilation system for safety and efficient movement of people and material. This method is risky. Poisonous gases, fires, floods and caving in lead to fatal accidents.
The developed economies are retreating from mining, processing and refining stages of production due to high labour costs, while the developing countries with large labour force and striving for higher standard of living are becoming more important. Several countries of Africa and few of south America and Asia have over fifty per cent of the earnings from minerals alone.
Depending on the mode of occurence and the nature of the ore, mining is of two types : surface and underground mining. The surface mining is also known as open-cast mining is the easiest and the cheapest way of mining minerals that occur close to the surface. Overhead costs such as safety precaution and equipment is relatively low in this method. The output is both large and rapid.
When the ore lies deep below the surface, underground mining method (shaft method) has to be used. In this method, vertical shafts have to be sunk, from where underground galleries radiate to reach the minerals. Minerals are extracted and transported to the surface through these passages. It requires specially designed lifts, drills, haulage vehicles, ventilation system for safety and efficient movement of people and material. This method is risky. Poisonous gases, fires, floods and caving in lead to fatal accidents.
The developed economies are retreating from mining, processing and refining stages of production due to high labour costs, while the developing countries with large labour force and striving for higher standard of living are becoming more important. Several countries of Africa and few of south America and Asia have over fifty per cent of the earnings from minerals alone.
Question: 1
Which one of the following method of mining is cheapest ?
Which one of the following method of mining is cheapest ?
Updated On: Oct 18, 2024
- Underground mining
- Open-cast mining
- Drill mining
- Underground mining with different approaches
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The Correct Option is B
Solution and Explanation
The correct option is (B) :Open-cast mining.
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Question: 2
Which one of the following is not correct statement about surface mining ?
Which one of the following is not correct statement about surface mining ?
Updated On: Oct 18, 2024
- It is also known as open cast mining
- It is easiest way of extraction
- It is cheapest way of mining
- Its safety cost is very high
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The Correct Option is D
Solution and Explanation
The correct option is (D) :Its safety cost is very high.
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Question: 3
The developed countries are avoiding mining in their own countries due to :
The developed countries are avoiding mining in their own countries due to :
Updated On: Oct 18, 2024
- poor avaiability of minerals
- lack of technology to mine
- high labour costs
- people are not interested in mining
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The Correct Option is C
Solution and Explanation
The correct option is (C) :high labour cost.
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Question: 4
Which one of the following component is not applicable to underground mining method ?
Which one of the following component is not applicable to underground mining method ?
Updated On: Oct 18, 2024
- Specially designed lifts
- Good ventilation system
- Mineral availability near the surface
- Haulage vehicles
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The Correct Option is C
Solution and Explanation
The correct option is (C) :Mineral availability near the surface.
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Question: 5
Mining activity comes under ______.
Mining activity comes under ______.
Updated On: Oct 18, 2024
- Primary activity
- Secondary activity
- tertiary activity
- Quaternary activity
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The Correct Option is A
Solution and Explanation
The correct option is (A) :Primary activity.
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Top Questions on Reading Comprehension
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THE FAIR ISLE METHOD: Fair Isle knitting is a traditional technique that involves using two or more colours of yarn in a single row to create intricate patterns and designs. This method requires careful tension management to ensure even stitches and prevent puckering. To begin, select your colours and cast on the desired number of stitches. As you knit, alternate between colours every few stitches, carrying the unused yarn along the back of the work. Mastering the Fair Isle technique allows you to create stunning visual effects in garments, accessories, and home textiles.
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