Ready for the test, in the fast lane: With our App for Android
Get the Fü App with our explanations and the official catalogue of questions.
Get it on Google Play
Sick of ads!?
Log in now and continue studying with no ads!
Fully equipped for exam preparation:
All of the questions from the driving test in all translations
All of the questions from the theory test, in many languages
Exam simulations and special questionnaires
Exam simulations and special questionnaires
Explanations for all Class A and B questions
Explanations for all car and motorcycle questions
Certified by Trusted Shops
Certified by Trusted Shops
Can be used on all devices (desktop, tablet, smartphone)
Can be used on all devices

The explanatory texts for the questions were machine translated. More info

All explanatory texts were compiled in German and then machine translated. This may result in translation errors. However, this only refers to the explanations to the questions. The translations of the questionnaires were done by TÜV | DEKRA arge tp 21 and are exactly the same as the translations in the theory test. These translations are only available once you are logged in. All other translations on the website were done by a different translation agency.
Grundstoff, Mofa

Was muss regelmäßig gewartet werden, um zu hohen Kraftstoffverbrauch und übermäßigen Schadstoffausstoß zu vermeiden?

The ignition system ensures the right moment of combustion in the engine. If this time is not correct, then the engine works very badly or not at all. The result is additional fuel consumption. Therefore, the ignition system should be checked regularly so that the combustion time is always set correctly.
The engine air filter works like a vacuum cleaner. When he is full, he no longer sucks or not good. It's the same with the car. The air filter cleans the necessary combustion air for the engine and is eventually clogged. To drive at the same speed, more gas must be given. This consumes more fuel. Therefore, the engine air filter should be serviced regularly.
Vergaser oder Einspritzanlage
Carburettor and injection system must also be adjusted regularly. Incorrect adjustment will not distribute the fuel properly or it will come at the wrong time. Then the combustion in the engine does not work and the fuel is not properly exploited. The result is that I have to give more throttle for the same speed and thus I use more fuel.

Prüfungsreif auf der Überholspur!

Register now to see the questions in your choice of 12 languages.

Sign up

Do you like our explanations?
You will be amazed by our online learning system that helps you prepare for your driving test! Learn all the answers for the theory test online and pass on your first try.
Ready for the test in the fast lane: The study App with our explanations!

Get it on Google Play

Download the ad-freeFü App for your smartphone or tablet and study with help from our explanations and the official catalogue of questions.