Environment & Ecology › Renewable Energy & Green Technologies – UPSC Prelims PYQs

Consider the following statements :

Statement I : Circular economy reduces the emissions of greenhouse gases.

Statement II : Circular economy reduces the use of raw materials as inputs.

Statement III : Circular economy reduces wastage in the production process.

Which one of the following is correct in respect of the above statements?

Consider the following statements :

Statement I : Of the two major ethanol producers in the world, i.e., Brazil and the United States of America, the former produces more ethanol than the latter.

Statement II : Unlike in the United States of America where corn is the principal feedstock for ethanol production, sugarcane is the principal feedstock for ethanol production in Brazil.

Which one of the following is correct in respect of the above statements?

Consider the following heavy industries :

1. Fertilizer plants
2. Oil refineries
3. Steel plants Green hydrogen is expected to play a significant role in decarbonizing how many of the above industries?

Consider the following statements :

1. Gujarat has the largest solar park in India.
2. Kerala has a fully solar powered International Airport.
3. Goa has the largest floating solar photovoltaic project in India.

Which of the statements given above is/are correct ?

Steel slag can be the material for which of the following ?

1. Construction of base road
2. Improvement of agricultural soil
3. Production of cement

Select the correct answer using the code given below :

In rural road construction, the use of which of the following is preferred for ensuring environmental sustainability or to reduce carbon footprint ?

1. Copper slag
2. Cold mix asphalt technology
3. Geotextiles
4. Hot mix asphalt technology
5. Portland cement

Select the correct answer using the code given below :

According to India's National Policy on Biofuels, which of the following can be used as raw materials for the production of biofuels ?

1. Cassava
2. Damaged wheat grains
3. Groundnut seeds
4. Horse gram
5. Rotten potatoes
6. Sugar beet

Select the correct answer using the code given below :

In the context of which one of the following are the terms 'pyrolysis and plasma gasification' mentioned?

'Net metering' is sometimes seen in the news in the context of promoting the

On which of the following can you find the Bureau of Energy Efficiency Star Label?

1. Ceiling fans
2. Electric geysers
3. Tubular fluorescent lamps

Select the correct answer using the code given below.

Biomass gasification is considered to be one of the sustainable solutions to the power crisis in India. In this context, which of the following statements is/are correct?

1. Coconut shells, groundnut shells and rice husk can be used in biomass gasification.
2. The combustible gases generated from biomass gasification consist of hydrogen and carbon dioxide only.
3. The combustible gases generated from biomass gasification can be used for direct heat generation but not in internal combustion engines.

Select the correct answer using the codes given below :

In the Union Budget 2011-12, a full exemption from the basic customs duty was extended to the bio-based asphalt (bioasphalt). What is the importance of this material?

1. Unlike traditional asphalt, bio-asphalt is not based on fossil fuels.
2. Bioasphalt can be made from non-renewable resources.
3. Bioasphalt can be made from organic waste materials.
4. It is eco-friendly to use bioasphalt for surfacing of the roads.

Which of the statements given above are correct?

Other than Jatropha curcas, why is Pongamia pinnata also considered a good option for the production of bio-diesel in India?

1. Pongamia pinnata grows naturally in most of the arid regions of India.
2. The seeds of Pongamia pinnata are rich in lipid content of which nearly half is oleic acid.

Which of the statements given above is/are correct?

Given below are the names of four energy crops. Which one of them can be cultivated for ethanol ?

In the context of alternative sources of energy, ethanol as a viable bio-fuel can be obtained from

Which one of the following Union Ministries is implementing the Biodiesel Mission (as Nodal Ministry)?

Match List I (Power generation plant) with List II (Feed material) and select the correct answer using the codes given below the Lists:

List I I. M/s Gowthami Solvents Oil Limited, Andhra Pradesh II. M/s KM. Sugar Mills, Uttar Pradesh III. M/s Satia Paper Mills, Punjab IV. M/s Al Kabeer Exports Limited, Andhra Pradesh

List II A) Rice husk B) Slaughter-house waste C) Distillery spent wash D) Black liquor

Codes:

Which one of the following fuels causes minimum environmental pollution?