Prelims

Consider the following substances:
I. Ethanol
II. Nitroglycerine
III. Urea
Coal gasification technology can be used in the production of how many of them?

Consider the following:
1. Battery storage
2. Biomass generators
3. Fuel cells
4. Rooftop solar photovoltaic units
How many of the above are considered “Distributed Energy Resources”?

In which of the following are hydrogels used?
1. Controlled drug delivery in patients
2. Mobile air-conditioning systems
3. Preparation of industrial lubricants
Select the correct answer using the code given below:

Which one of the following is the exhaust pipe emission from Fuel Cell Electric Vehicles powered by hydrogen?

Recently, the term “pumped-storage hydropower” is actually and appropriately discussed in the context of which one of the following?

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?

With reference to green hydrogen, consider the following statements:
1. It can be used directly as a fuel for internal combustion.
2. It can be blended with natural gas and used as fuel for heat or power generation .
3. It can be used in the hydrogen fuel cell to run vehicles.
How may of the abvoe statements are correct?

With reference to solar water pumps, consider the following statements:
1. Solar power can be used for running surface pumps and not for submersible Pumps.
2. Solar power can be used for running centrifugal pumps and not the ones with piston.
Which of the statements given above is/are correct?

With reference to bio-toilets used by the Indian Railways, consider the following statements :
(1) The decomposition of human waste in the bio-toilets is initiated by a fungal inoculum.
(2) Ammonia and water vapour are the only end products in this decomposition which are released into the atmosphere.
Which of the statements given above is/are correct?

With reference to technology for solar power production, consider the following statements:
1. ‘Photovoltaics’ is a technology that generates electricity by direct conversion of light into electricity, while ‘Solar Thermal’ is a technology that utilizes the Sun’s rays to generate heat which is further used in electricity generation process.
2. Photovoltaics-generates Alternating Current (AC), while Solar Thermal generates Direct Current (DC).
3. India has manufacturing base for Solar Thermal technology, but not for photovoltaics.
Select the correct answer using the code given below: