Past Questions — 2023

Chlorofluorocarbons (CFCs) are synthetic organic compounds containing chlorine, fluorine, and carbon. They were developed as safe, non-toxic, and non-flammable alternatives to dangerous refrigerants like ammonia and sulfur dioxide. 1. **Refrigerators and Air Conditioners (Options b and c):** CFCs were primarily used as refrigerants (cooling agents) in refrigerators and air conditioning systems because of their stability and efficiency in heat transfer. 2. **Perfumes and Aerosols (Option a):** CFCs were widely used as propellants in aerosol spray cans, which include perfumes, hairsprays, and deodorants, to push the product out of the container. Since CFCs were used in all three mentioned applications, the correct option is 'All of these'. Note: Due to their role in depleting the ozone layer, their use has been phased out globally under the Montreal Protocol (1987).

A topographic survey is specifically designed to determine the relative locations of points on the Earth's surface and, most importantly, their elevations (vertical distance relative to a datum). This is typically achieved through the use of contour lines, which connect points of equal elevation, allowing for the representation of the terrain's relief (hills, valleys, and slopes). Why other options are incorrect: - b. Marine survey (Hydrographic survey): While it involves depth measurements (bathymetry), its primary focus is the mapping of underwater features and water bodies rather than general land elevation. - c. Township survey: This is generally a cadastral or boundary survey used to define property lines and land ownership parcels. - d. Road survey: While road surveys include leveling (elevation), they are a specific application of surveying for a linear project. Topographic surveying is the broader, fundamental category of survey that involves the general collection of elevation data for a given area.

Arsenic enters water sources through both natural (geogenic) and anthropogenic (human-made) sources. 1. **Fertilizers (Option b):** Certain phosphate fertilizers contain arsenic as an impurity. When applied to agricultural land, these can leach into groundwater or run off into surface water bodies. 2. **Industrial Waste (Option c):** Various industrial processes are significant sources of arsenic pollution. These include smelting of non-ferrous metals (like copper and lead), pesticide manufacturing, glass production, and the tanning industry. Effluents from these industries often contain high concentrations of arsenic. 3. **Floods (Option a):** While floods can redistribute contaminated sediments, they are not a 'source' of arsenic; they are a transport mechanism. Since both fertilizers and industrial waste are primary anthropogenic sources of arsenic contamination in water, option (d) is the most comprehensive and correct answer.

Environmental Impact Assessment (EIA) was formally introduced in India in 1976. The process began when the Planning Commission and the Department of Science and Technology requested the Administrative Tribunal to examine the environmental impact of river valley projects. While the EIA process was initiated in 1976, it was later given statutory backing through the Environment Protection Act of 1986 and the subsequent EIA Notification of 1994. Analysis of options: - Option (a) 1978: Incorrect. While environmental awareness was growing, the formal introduction of EIA requests occurred in 1976. - Option (b) 1976: Correct. This is the year the Indian government first started requesting environmental assessments for major projects. - Option (c) 1879: Incorrect. This predates modern environmental science and the concept of EIA. - Option (d) 1789: Incorrect. This predates modern environmental science and the concept of EIA.

The 'Sites and Services' approach is a housing strategy where the government or agency provides a plot of land (site) and basic infrastructure (services like water, sanitation, and electricity), allowing the residents to build their own houses incrementally as their financial capacity grows. 1. Aranya Housing (Indore): Designed by B.V. Doshi, this project is a world-renowned example of the 'Sites and Services' approach. It provided a basic core and infrastructure, empowering low-income residents to expand and customize their homes over time. It won the Aga Khan Award for Architecture in 1989. 2. Tara Housing: While focused on affordable housing, it does not define the primary benchmark for the 'Sites and Services' model in the same way Aranya does. 3. IIM staff quarters: These are typically planned, completed institutional residential complexes, not incremental sites and services projects. 4. Hairhand Housing: This is not a recognized landmark project associated with the 'Sites and Services' methodology in urban planning literature.

To determine which place is not related to steel production, we analyze the industrial significance of each location: 1. **Durgapur, West Bengal**: This is a major industrial hub known for the Durgapur Steel Plant (DSP), making it directly related to steel production. 2. **Jamshedpur, Jharkhand**: Known as the 'Steel City' of India, it is the site of Tata Steel (TISCO), one of the largest steel plants in the country. It is fundamentally related to steel production. 3. **Jaipur, Orissa (Note: Likely a typo for Jajpur)**: While the option says 'Jaipur, Orissa', it is clearly referring to the industrial belt of Odisha (Orissa). Jajpur/Kalinganagar in Odisha is one of the largest steel hubs in India. Even if read as written, the context of the question focuses on the distinction between raw material extraction and production. 4. **Jharia, Jharkhand**: Jharia is world-famous as a **coal mining center**. While coal is a critical input (coking coal) for steel production, Jharia itself is a site of extraction (mining), not a site of steel production (manufacturing). Therefore, among the options, Jharia is the only location primarily defined by mining rather than the production of steel.

In the context of Environmental Impact Assessment (EIA), mitigation measures are strategies designed to avoid, reduce, or remedy adverse environmental effects. These measures are generally categorized into preventive, corrective, and compensatory measures. 1. Preventive measures: These are actions taken to stop an impact from occurring in the first place. Public awareness programs are classic preventive measures because they educate the community and stakeholders on how to avoid harmful behaviors or accidents, thereby preventing environmental degradation before it happens. 2. Corrective measures (Option b): These are actions taken to fix or repair damage that has already occurred (e.g., cleaning up an oil spill). 3. Lead agency (Option a): This refers to the government body responsible for coordinating the EIA process, not a type of mitigation measure. 4. Aspect (Option d): In environmental management (ISO 14001), an 'environmental aspect' is an element of an organization's activities, products, or services that interacts or can interact with the environment. It is the cause of an impact, not a mitigation measure. Therefore, a public awareness program serves as a preventive mitigation measure.

Environmental Impact Assessment (EIA) is a process used to evaluate the potential environmental effects of a proposed project or development. The core objective of EIA is to ensure that economic growth (industrialization, infrastructure development, urban expansion) does not occur at the expense of the natural world. Therefore, EIA serves as the 'intrinsic link' or the balancing mechanism between the 'Environment' and 'economic growth'. Analysis of options: - (a) Ecological: While related, 'Ecological' is an adjective. The sentence structure requires a noun to balance with 'economic growth'. - (b) Polluted: This is a negative state and does not represent the systemic link EIA aims to manage. - (c) Beneficial: This is an adjective and does not fit the conceptual framework of the link between nature and economy. - (d) Environment: This is the correct noun. EIA bridges the gap between environmental preservation and economic development, promoting the concept of 'Sustainable Development'.

Based on the 2011 Census of India (which is the standard reference for most competitive exams unless current year data is specified), Mizoram has the highest literacy rate among all the North-eastern states and one of the highest in India. 1. Mizoram: Approximately 91.33% literacy rate. 2. Tripura: Approximately 87.22% literacy rate. 3. Meghalaya: Approximately 74.29% literacy rate. 4. Assam: Approximately 72.19% literacy rate. Comparing these figures, Mizoram clearly holds the highest literacy rate in the North-eastern region.

Based on air quality indices (AQI) and environmental data reports for the North Eastern Region of India, Aizawl (Mizoram) consistently records some of the lowest levels of particulate matter (PM2.5 and PM10) compared to other major urban centers in the region. 1. Guwahati (Assam) is the largest city in the North East and suffers from significant pollution due to high traffic density, industrial activity, and geographical trapping of pollutants. 2. Imphal (Manipur) and Kohima (Nagaland) generally have better air quality than Guwahati, but Aizawl's specific topography and lower industrial footprint often place it as one of the cleanest cities in terms of air pollution in the region. In the context of competitive exams for Town Planning and Environmental Quality, Aizawl is recognized for maintaining a lower pollution profile relative to the more industrialized or densely populated hubs of the North East.

In the Environmental Impact Assessment (EIA) process, the 'Screening' stage is the first critical step where it is determined whether a proposed project requires a full EIA or not. This decision is made by the 'Lead Agency' (also known as the Competent Authority or Regulatory Body). The lead agency evaluates the project based on established thresholds, the scale of the project, and the sensitivity of the environment in the affected area. Why other options are incorrect: - a. Public: The public is involved during the 'Public Hearing' or 'Public Consultation' phase, which occurs after the scoping or draft EIA report is prepared, not to decide if the EIA is required in the first place. - b. Consumer: Consumers are end-users of a product or service and have no regulatory authority in the environmental clearance process. - d. EIAS: This likely refers to an EIA Specialist or Consultant. While a consultant may provide technical advice or prepare the report, they do not have the legal authority to decide whether an EIA is legally required; that power rests with the government/regulatory lead agency.

The ISO 14000 family is a set of international standards related to environmental management. 1. ISO 14031 specifically focuses on 'Environmental Performance Evaluation' (EpE). It provides a framework for organizations to measure, analyze, and evaluate their environmental performance to support management decisions. Why other options are incorrect: - ISO 14011: This standard dealt with environmental auditing procedures and criteria (though it has largely been superseded by ISO 19011). - ISO 14021: This standard focuses on 'Environmental labels and declarations — Self-declared environmental claims' (Type II environmental labeling). - ISO 14041: This standard focused on 'Life Cycle Assessment' (LCA) principles and framework (now integrated into the ISO 14040 series). Therefore, for the evaluation of environmental performance, ISO 14031 is the correct standard.

The Human Development Index (HDI) is a composite statistic developed by the UNDP to measure average achievement in key dimensions of human development. It consists of three dimensions: 1. A long and healthy life (Health), 2. Knowledge (Education), and 3. A decent standard of living (Income). 1. Longevity is measured specifically by 'Life Expectancy at Birth'. Life expectancy serves as a proxy for the overall health and nutrition status of a population, as it reflects the quality of healthcare, nutrition, and sanitation available in a country. 2. Option (b) Living Standard is measured by GNI (Gross National Income) per capita. 3. Option (c) Infant Mortality is a health indicator, but the HDI specifically uses Life Expectancy (Longevity) as its primary proxy for the health dimension. 4. Option (d) Purchasing Power Parity (PPP) is the method used to adjust income figures to compare living standards across different countries, not a proxy for longevity.

Aranya Low Cost Housing project in Indore, designed by architect B.V. Doshi, is a globally recognized example of community housing. It was designed with a 'site and services' approach, providing a basic infrastructure and a small core house, allowing residents to expand their homes incrementally based on their needs and resources. This approach fostered a strong sense of community ownership, social interaction, and organic growth. Comparing the other options: - Gandhi Ashram: Primarily a spiritual and social center/commune, not a designed 'community housing' project in the urban planning sense. - Kanchenjunga Apartments: A high-rise luxury residential building in Mumbai, representing private vertical housing rather than community-centric social housing. - IIM Dormitories: These are institutional residential facilities (hostels) for students, which differ from community housing intended for permanent residential living and social integration.

Environmental Impact Assessment (EIA) is a comprehensive process that involves several rigorous stages, including screening, scoping, baseline data collection, impact prediction, mitigation planning, public hearing, and final review. Because it requires extensive field surveys (often across different seasons), technical modeling, and legal consultations, it is widely recognized in urban planning and environmental management as a 'time-consuming' process. Analysis of other options: - b. Preventive: While EIA is a preventive tool (it aims to prevent environmental degradation), the sentence structure 'EIA is consuming process' requires a noun that describes what is being 'consumed.' 'Preventive' is an adjective describing the nature of the tool, not something that is consumed. - c. Control: EIA provides a basis for control, but it does not 'consume control.' - d. Short term: EIA is generally not a short-term process; it is a detailed study that takes significant time to complete before a project is approved.

Affordable Housing in Partnership (AHP) is a key component of the Pradhan Mantri Awas Yojana (PMAY). Its primary uniqueness lies in the 'In-situ Slum Redevelopment' (ISSR) approach. Under AHP, the government partners with private developers to utilize the land occupied by slums for the construction of houses. The uniqueness is that the land is leveraged as a resource; the private developer builds houses for the slum dwellers on a portion of the land, and in exchange, they are allowed to develop the remaining land commercially or residentially for sale in the open market. Why other options are incorrect: - a. Rental Housing: This falls under the ARHCs (Affordable Rental Housing Complexes) scheme, which is a separate vertical from AHP. - c. Compensatory F.A.R: While Floor Area Ratio (FAR) incentives are often used to make AHP projects viable, the 'uniqueness' of the AHP model itself is the rehabilitation of slum dwellers on their own land (In-situ). - d. Credit Linkage for Subsidy: This refers to the Credit Linked Subsidy Scheme (CLSS), which is a financial mechanism applicable across various PMAY verticals, not unique to AHP.

In the context of Urban Planning and Planned Housing, the process follows a logical sequence based on demand and resource allocation. 1. **People**: The process begins with the identification of the target population (the demand). Planners must first determine who the housing is for (income group, family size, and demographic needs) to define the requirements. 2. **Land**: Once the demand is established, suitable land is identified and acquired. Land use planning ensures the site is appropriate for residential development and accessible. 3. **House**: After securing the land, the physical structures (houses) are designed and constructed based on the needs of the people identified in step one. 4. **Services**: Finally, the housing is integrated with essential services (water supply, electricity, sewage, roads, and social infrastructure) to make the housing habitable and sustainable. Other options are incorrect because they suggest acquiring land or services before knowing the target population (the primary driver of planning) or building houses before securing the land.

A detritivore is an organism that feeds on detritus (dead organic material), such as decaying plants and animal parts. Decomposers (which include both detritivores like earthworms and microorganisms like fungi and bacteria) break down this organic matter, returning essential nutrients to the soil. While there is a technical distinction in advanced biology—detritivores physically ingest the matter (fragmentation) and decomposers chemically break it down (secretion of enzymes)—in the context of general competitive examinations, 'Decomposers' is the correct categorical match for detritivores. Why other options are incorrect: - Herbivores: Organisms that eat only plants (primary consumers). - Carnivores: Organisms that eat other animals (secondary/tertiary consumers). - None of these: Incorrect because 'Decomposers' fits the functional role of a detritivore.

Step-by-step reasoning: 1. Analyze the options based on architectural typology and height: - Aranya Housing (Indore): Designed by B.V. Doshi, this is a famous example of low-rise, low-cost site-and-services housing focused on community growth and incremental housing. - Belapur Housing (Navi Mumbai): Also designed by B.V. Doshi, this project focuses on low-to-mid-rise clustered housing with a strong emphasis on open spaces and courtyards. - Tara Apartments: This is not a widely recognized landmark example of high-rise housing in the context of standard town planning and architecture examinations. - Kanchenjunga Apartments (Mumbai): Designed by Joseph Allen Stein, this is a renowned high-rise residential building in Mumbai, known for its structural innovation and verticality. 2. Conclusion: Among the given options, Kanchenjunga Apartments is the only one that fits the definition of a 'high-rise' housing design example.

Environmental Impact Assessment (EIA) is a systematic process used to evaluate the potential environmental effects of a 'proposed' project or development before it is carried out. The primary objective of an EIA is to identify, predict, and evaluate the beneficial (positive) and detrimental (negative) impacts of the proposed action on the environment. By analyzing the proposed project, decision-makers can implement mitigation measures to reduce negative impacts or decide whether the project should proceed. - 'Micro' and 'Macro' (Options a and d) refer to the scale of analysis (small-scale vs. large-scale) but are not the standard terms used to describe the subject of the EIA study in this context. - 'Action' (Option b) is too generic; while an EIA evaluates an action, the technical term for the project under review is the 'proposed action' or 'proposed project'.