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Environment & Energy Conservation

Basic Science & Engineering · Safety, Environment & IT

Useful for: Railway RRB, CTET, OTET, UPSC NDA/NA, UPSC CDS, UPSC CAPF (AC), Junior Teacher, OSEPA Primary Teacher / JT Category-I

and 6 more exams

OSSC Science, OSSSC Govt TGT Science — CBZ, OSSSC Govt TGT Science — PCM, Special OTET, SSB TGT CBZ, SSB TGT PCM

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Overview

Conserving energy and protecting the environment reduce costs and pollution; efficient devices and the 3Rs are key tools.

Key points

Renewable: solar, wind, hydro, biomass; non-renewable: coal, petroleum, natural gas.
LEDs use much less power than incandescent bulbs for the same light.
BEE star labels: more stars mean higher energy efficiency.
3Rs: reduce, reuse, recycle.
Pollution types: air, water, soil, noise.

Explanation

Switch off idle machines and lights; fix leaks of compressed air and water.
Regenerative braking saves energy in electric trains.
Proper maintenance improves efficiency.
Segregate waste at source.

Step by step

Identify the concept, tool or rule involved.
Recall the definition, value or procedure.
Check units, safety logic and the direction of the effect.

Examples

More stars on a BEE label means → higher energy efficiency.
A renewable energy source → solar.
The three Rs → reduce, reuse, recycle.

Traps and advanced points

Trap: Calling natural gas renewable.
Trap: Thinking fewer stars is better.
Trap: Ignoring maintenance as a saving measure.

Quick revision

Renewable vs non-renewable.
BEE stars.
3Rs.

Practice MCQs

During a laboratory exercise on Waste Management, students compare repeated observations. which statement about Waste Management is NOT appropriate?
1. Waste reduction, segregation, reuse, recycling and safe disposal serve different purposes.
2. Sort classroom waste into appropriate categories and discuss reduction first.
3. Mixing all waste together makes recycling easier.
4. Waste Management should be interpreted according to its purpose and context.
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Answer: (c) Mixing all waste together makes recycling easier.. The NOT-appropriate statement is: Mixing all waste together makes recycling easier.
Which statement about Waste Management is NOT appropriate?
1. Waste reduction, segregation, reuse, recycling and safe disposal serve different purposes.
2. Sort classroom waste into appropriate categories and discuss reduction first.
3. Mixing all waste together makes recycling easier.
4. Waste Management should be interpreted according to its purpose and context.
Read chapter notes · Similar questions
Show answer
Answer: (c) Mixing all waste together makes recycling easier.. The NOT-appropriate statement is: Mixing all waste together makes recycling easier.
During a laboratory exercise on Waste Management, students compare repeated observations. A teacher wants to apply Waste Management correctly. Which action is most appropriate?
1. Mixing all waste together makes recycling easier.
2. Sort classroom waste into appropriate categories and discuss reduction first.
3. Waste Management is useful only for record keeping and has no effect on learning.
4. Waste Management should be applied identically in every situation without checking learner needs.
Read chapter notes · Similar questions
Show answer
Answer: (b) Sort classroom waste into appropriate categories and discuss reduction first.. Waste reduction, segregation, reuse, recycling and safe disposal serve different purposes.
A teacher wants to apply Waste Management correctly. Which action is most appropriate?
1. Mixing all waste together makes recycling easier.
2. Sort classroom waste into appropriate categories and discuss reduction first.
3. Waste Management is useful only for record keeping and has no effect on learning.
4. Waste Management should be applied identically in every situation without checking learner needs.
Read chapter notes · Similar questions
Show answer
Answer: (b) Sort classroom waste into appropriate categories and discuss reduction first.. Waste reduction, segregation, reuse, recycling and safe disposal serve different purposes.
Choose the most defensible exam-ready conclusion about Waste Management.
1. Mixing all waste together makes recycling easier.
2. Waste Management is useful only for record keeping and has no effect on learning.
3. Waste Management should be applied identically in every situation without checking learner needs.
4. Waste reduction, segregation, reuse, recycling and safe disposal serve different purposes.
Read chapter notes · Similar questions
Show answer
Answer: (d) Waste reduction, segregation, reuse, recycling and safe disposal serve different purposes.. Choose the most defensible exam-ready conclusion about Waste Management.: Waste reduction, segregation, reuse, recycling and safe disposal serve different purposes.
During a laboratory exercise on Waste Management, students compare repeated observations. Choose the most defensible exam-ready conclusion about Waste Management.
1. Mixing all waste together makes recycling easier.
2. Waste Management is useful only for record keeping and has no effect on learning.
3. Waste Management should be applied identically in every situation without checking learner needs.
4. Waste reduction, segregation, reuse, recycling and safe disposal serve different purposes.
Read chapter notes · Similar questions
Show answer
Answer: (d) Waste reduction, segregation, reuse, recycling and safe disposal serve different purposes.. Waste reduction, segregation, reuse, recycling and safe disposal serve different purposes.
From the perspective of definition and scope, which one of the following statements about Environment is correct?
1. Energy flows through food chains while nutrients cycle.
2. Energy is recycled indefinitely through trophic levels.
3. Environment is unrelated to institutions, processes or real-world applications.
4. Environment has no exceptions or limitations in exam analysis.
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Answer: (a) Energy flows through food chains while nutrients cycle.. Energy flows through food chains while nutrients cycle.
Consider the following statements on Environment, focusing on definition and scope: 1. Energy flows through food chains while nutrients cycle. 2. Energy is recycled indefinitely through trophic levels. Which of the statements given above is/are correct?
1. 1 only
2. 2 only
3. Both 1 and 2
4. Neither 1 nor 2
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Answer: (a) 1 only. Statement 1 is correct; Statement 2 is a common misconception.
With reference to Environment (definition and scope), consider the following statements: 1. Energy flows through food chains while nutrients cycle. 2. Climate change and ozone depletion are distinct environmental processes. Which of the statements given above is/are correct?
1. 1 only
2. 2 only
3. Both 1 and 2
4. Neither 1 nor 2
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Answer: (c) Both 1 and 2. Both statements are correct.
With reference to Environment (working mechanism), consider the following statements: 1. Energy is recycled indefinitely through trophic levels. 2. Pollution prevention is generally preferable to end-of-pipe treatment. Which of the statements given above is/are correct?
1. 1 only
2. 2 only
3. Both 1 and 2
4. Neither 1 nor 2
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Answer: (b) 2 only. Only statement 2 is correct.
Consider the following statements on Environment, focusing on comparison with related concepts: 1. Biodiversity exists at genetic, species and ecosystem levels. 2. Energy is recycled indefinitely through trophic levels. Which of the statements given above is/are correct?
1. 1 only
2. 2 only
3. Both 1 and 2
4. Neither 1 nor 2
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Answer: (a) 1 only. Statement 1 is correct; Statement 2 is a common misconception.
With reference to Environment (conceptual boundary), consider the following statements: 1. Energy is recycled indefinitely through trophic levels. 2. Climate change and ozone depletion are distinct environmental processes. Which of the statements given above is/are correct?
1. 1 only
2. 2 only
3. Both 1 and 2
4. Neither 1 nor 2
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Answer: (b) 2 only. Only statement 2 is correct.
From the perspective of institutional design, which one of the following statements about Environment is correct?
1. Community trust can improve intelligence and conflict prevention.
2. The Himalaya are young fold mountains while the Peninsular block is ancient.
3. Biodiversity exists at genetic, species and ecosystem levels.
4. Independent constitutional bodies support elections, audit and public-service recruitment.
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Answer: (c) Biodiversity exists at genetic, species and ecosystem levels.. Biodiversity exists at genetic, species and ecosystem levels.
With reference to Environment (institutional design), consider the following statements: 1. Energy flow is unidirectional; nutrients cycle. 2. Climate change and ozone depletion are distinct environmental processes. Which of the statements given above is/are correct?
1. 1 only
2. 2 only
3. Both 1 and 2
4. Neither 1 nor 2
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Show answer
Answer: (c) Both 1 and 2. Both statements are correct.
From the perspective of conceptual boundary, which one of the following statements about Environment is correct?
1. Pollution prevention is generally preferable to end-of-pipe treatment.
2. Rivers create erosional and depositional landforms across their course.
3. Community trust can improve intelligence and conflict prevention.
4. Reasoning questions should be solved from stated premises only.
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Answer: (a) Pollution prevention is generally preferable to end-of-pipe treatment.. Pollution prevention is generally preferable to end-of-pipe treatment.