IAS PYQTopic: Clean Energy Tech (8 Questions)
With reference to 'Direct Air Capture', an emerging technology, which of the following statements is/are correct?
- I.It can be used as a way of carbon sequestration.
- II.It can be a valuable approach for plastic production and in food processing.
- III.In aviation, it can be a source of carbon for combining with hydrogen to create synthetic low-carbon fuel.
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Related topics in Science and Technology
Consider the following types of vehicles:
- I.Full battery electric vehicles
- II.Hydrogen fuel cell vehicles
- III.Fuel cell-electric hybrid vehicles
How many of the above are considered as alternative powertrain vehicles?
Related topics in Science and Technology
In the context of electric vehicle batteries, consider the following elements:
- I.Cobalt
- II.Graphite
- III.Lithium
- IV.Nickel
How many of the above usually make up battery cathodes?
Related topics in Science and Technology
2023
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 many of the above statements are correct?
2022
With reference to polyethylene terephthalate, the use of which is so widespread in our daily lives, consider the following statements:
1. Its fibres can be blended with wool and cotton fibres to reinforce their properties.
2. Containers made of it can be used to store any alcoholic beverage.
3. Bottles made of it can be recycled into other products.
4. Articles made of it can be easily disposed of by incineration without causing greenhouse gas emissions.
Which of the statements given above are correct?
2021
With reference to street-lighting, how do sodium lamps differ from LED lamps?
1. Sodium lamps produce light in 360 degrees but it is not so in the case of LED lamps.
2. As street-lights, sodium lamps have longer life span than LED lamps.
3. The spectrum of visible light from sodium lamps is almost monochromatic while LED lamps offer significant colour advantages in street-lighting.
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