Driving licence test
This is an old question that is no longer in use.
Images may be missing and the information may be dated.
Is it true that biofuels reduce the total carbon dioxide content in the atmosphere?
Biofuels are made from living organisms, such as trees. As these trees grow, they take up and filter carbon dioxide. However, when they are later used as biofuel, the trees release carbon dioxide.
In simple terms, the purification and the emissions are equal in size and therefore cancel each other out. The sum of added carbon dioxide is therefore zero, i.e. neutral. But in reality, it is difficult to completely neutralise the biofuels, as they also need to be processed (you cannot simply put a tree in the fuel tank of a car. The trees need to be felled, transported and made into fuel and all of this requires energy).
This is an example of one of the driving theory questions at Körtkortonline.se. There are two languages: English (free demo test), Swedish (free demo test)
There is also a driving licence book online (2026).
More examples of theory questions:
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- Which alternative is something that can have an impact on genetic material, cause cancer and also contribute to the formation of tropospheric ozone?
- Which alternative is something that contributes to the acidification and eutrophication of water, while also having an effect on our breathing?
- Which alternative is something that is dangerous close to the earth’s surface but good higher in the atmosphere?
- What is a car pool?
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- What is true regarding the registration certificate for a private car?
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- What is right of recourse?
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- What is the maximum permitted length of a vehicle or vehicle/trailer combination that does not have an anti-lock braking system?
- You want to transport a box on the car’s roof. The car is 160 cm wide and the width of the box is 175 cm. Are you allowed drive the car with this load on a public road?
- What is true regarding trailers and parking brakes?
- What is the maximum distance that you as a private car driver may tow another private car on a motorway?
- A friend has a problem with his two-wheeled motorcycle and asks if you can pull it behind your car when he is sitting on and steering the motorcycle. Is this permitted?
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- You are driving the car from which the picture is taken and are unsure whether you are driving on a priority road. How should you reason, given the road to the right?
Category:
- Driving licence test: Vehicle
- Driving licence test: Environment
- Driving licence test: Traffic safety
- Driving licence test: Traffic regulations
- Driving licence test: Individual circumstances
- Driving licence test: Road signs
