Assertion (A) : The inner lining of a sanitary well should be built of bricks or stones set in cement up to a depth of atleast 6 feet.
Reason (R) : The inner lining of a sanitary well needs to be built of bricks or stones set in cement for a certain depth, so that the water enters from the bottom and not from the sides of the well.
In the light of the above statements, choose the most appropriate answer from the options given below :
Analyzing Assertion (A) and Reason (R) for Sanitary Wells
This question requires evaluating two statements about the construction of sanitary wells.
Statement Analysis
- Assertion (A): States that the inner lining of a sanitary well must be constructed using bricks or stones set in cement for a minimum depth of 6 feet.
- Reason (R): Explains that this cemented lining is necessary to prevent water infiltration from the sides of the well, ensuring water is drawn only from the bottom strata.
Evaluating Reason (R)
Reason (R) correctly identifies a crucial aspect of sanitary well design. The primary purpose of lining the upper portion of a well is:
- To prevent surface water, contaminants, and shallow groundwater from seeping into the well through the sides.
- To ensure the water source is primarily from a deeper, potentially cleaner aquifer accessed at the well bottom.
Therefore, Reason (R) is factually correct regarding the function of a well lining.
Evaluating Assertion (A)
Assertion (A) specifies a particular construction detail (bricks/stones in cement up to 'at least 6 feet'). While lining the upper part of a well is standard practice for sanitation, the exact depth and materials can vary based on specific geological conditions, local regulations, and the type of well. Based on the provided correct answer indicating that (A) is not correct, we conclude that this specific assertion regarding the depth and material is deemed inaccurate in the context of this question.
Conclusion
Reason (R) accurately describes the purpose of the lining in preventing side seepage. However, Assertion (A)'s specific claim about the required depth and materials is considered incorrect. This aligns with option D.
Correct Answer Rationale: Reason (R) correctly explains a fundamental principle of sanitary well construction. Assertion (A) provides a specific detail about depth and materials which is considered incorrect, even though the general idea of lining is correct.
Important Questions from Basics of Environment
The Wild Life (Protection) Amendment Act, 2022 seeks to implement the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES). Which of the following statements is correct about CITES?
1. CITES is an agreement between governments to ensure that international trade in the specimens of wild animals and plants does not threaten the survival of the species.
2. Under CITES, plant and animal specimens are classified into five categories based on the threat to their extinction.
3. The Convention requires countries to regulate the trade of all listed specimens through permits.
4. It also seeks to regulate the possession of live animal specimens.
Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R):
Assertion (A): Green hydrogen production will be critical for world community to achieve carbon neutrality by the year 2050.
Reason (R): The energy content of hydrogen gas is much higher than that of coal.
In the light of the above statements. choose the correct answer from the options given below :
For drinking and irrigation purposes, the availability of suitable water out of earth’s total water supplies is about less than
Permafrost is defining characteristic of which biome?
Identify the features associated with Kyoto Protocol.
(A) Heavier burden on developed countries to cut down greenhouse gas emissions.
(B) International emissions trading.
(C) Nationally determined contributions.
(D) Clean Development Mechanism.
Choose the correct answer from the options given below:
