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Practice MCQ's- Environment & Ecology 2
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Sudarshan Gurjar is teaching live on Unacademy Plus

Sudarshan Gurjar
Top & Verified Plus Educator. Winner of Perfect Presence Award!! Mentored more than 50,000 students.

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  1. Aboutme SUDARSHAN GURAR Verified Educator & Plus Educator at Unacademy. Mentored more than 10,000 students. Teaching Geography since 2013 (UPSC category). A Geography Learner. COURSES AVAILABLE ON PLATFORM Geography through Maps. Current Affairs & In-depth Editorial Analysis. Special Current Affairs on Madhya Pradesh & many more. PLUS CoURSES Current Affairs & In-depth Editorial Analysis. Y unacademy


  2. Unacademy Sponsored Register for this MPPSC course, learn from one of India's Top Educator and give yourself the best chance to ace the exam! MPPSC PLUS COURSE Art & Culture of Madhya Pradesh for MPPSC (Prelims & Mains) unacadem Sudarshan Gurjar unacademy UNACADEMY.COM Everything you need for MPPSC! Unacademy, your one-stop solution! Apply Novw


  3. UPSC PLUS COURSE unacademy Sudarshan Gurjar Geography & Current Issues of Environment unacademy


  4. Off-grid Renewable Energy can be a game changer as it can provide energy to isolated communities and areas. Which of the following can be used as a part of such system? 1. Biomass gasifiers 2. Micro hydro projects 3. Solar Photo Voltaic Roof-top Systems Select the correct answer using the code below (a) 1 and 2 only (b) 2 and 3 only (c) 1 and 3 only (d) 1, 2 and 3


  5. . Answer D Distributed/decentralized renewable power projects using wind energy, biomass energy, hydro power and hybrid systems are being established in the country to meet the energy requirements of isolated communities and areas which are not likely to be electrified in near future. Off-grid Renewable Energy/ Power can be generated using the following: Biomass based heat and power projects and industrial waste to- energy projects for meeting captive needs. Biomass gasifiers for rural and industrial energy applications Watermills/micro hydro projectsfor meeting electricity requirement of remote villages Small Wind Energy & Hybrid Systems.


  6. .For mechanical and electrical applications, mainly where grid electricity is not available. Solar PV Roof-top Systems for abatement of diesel for power generation in urban areas The Ministry of New and Renewable energy is running a program with main objectives of: supporting R D to make such systems more reliable and cost effective, demonstration, field testing, strengthening manufacturing base.


  7. Consider the following statements about Bio-gas: 1. It is a combination of methane and carbon dioxide. 2. It is formed by anaerobic digestion of organic materials. 3. It normally burns without smoke and has a high heating capacity Which of the statements given above is/are correct? (a) 1 and 2 only (b) 1 and 3 only (c) 2 and 3 only (d) 1, 2 and 3


  8. Answer D Statement 1 is correct: Bio-gas contains up to 65% methane and 35% CO2. Statement 2 is correct: Biogas is produced by the anaerobic digestion of organic materials in a sealed fermenter .This fermenter transforms organic materials into biogas by using methane-producing bacteria through a biologically complex process at approximately 38 - 55 degrees Celsius. Statement 3 is correct: It burns without smoke, leaves no residue like ash in wood, charcoal and coal burning. Its heating capacity is high. The large-scale utilisation of bio-waste and sewage material provides a safe and efficient method of waste- disposal besides supplying energy and manure. Bio-gas is also used for lighting.


  9. Consider the following statements with regard to Biological Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) hile COD measures the amount of oxygen required to oxidise the organic compounds, BOD measures it for inorganic compounds in water. 2. A highly polluted water will have low BOD and high COD Which of the statements given above is/are correct? (a) 1 only (b) 2 only (c) Both 1 and 2 (d) Neither 1 nor 2