compressed air
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compressed air
Air that has been compressed by a compressor to a pressure higher than atmospheric pressure. It is often used as an energy source for tools or for inflating tires.
Der Schlagschrauber in der Werkstatt wird mit Druckluft betrieben.
The impact wrench in the workshop is powered by compressed air.
The word is a simple and logical compound of 'Druck' (pressure) and 'Luft' (air). So it literally describes air that is under pressure.
Für das Fahrrad brauchen wir eine Pumpe, aber keine Druckluft.
For the bicycle, we need a pump, but not compressed air.
'Druckluft' (compressed air) is often described as a means or tool. A very common construction is 'mit Druckluft' (with compressed air) followed by a verb such as 'betreiben' (to operate), 'reinigen' (to clean), or 'antreiben' (to power/drive).
Die Maschine wird mit Druckluft angetrieben.
The machine is powered by compressed air.
'Druckluft' (compressed air) is the base word for many technical terms. Common compounds are 'Druckluftwerkzeug' (pneumatic tool), 'Druckluftbremse' (air brake), or 'Druckluftflasche' (compressed-air cylinder).
In der Autowerkstatt kommen viele Druckluftwerkzeuge zum Einsatz.
Many pneumatic tools are used in the auto repair shop.
air pressure
'Luftdruck' and 'Druckluft' sound similar, and both have to do with air and pressure. 'Luftdruck' is air pressure. This can be the pressure in the atmosphere, which is important for the weather, or the pressure in a tire or ball. 'Druckluft', on the other hand, is air that has been compressed especially strongly. It is used, for example, for tools or for inflating things. The mix-up happens easily because both words are made from the same parts. In practical terms: you measure 'Luftdruck', but you work or pump with 'Druckluft'.
In der Werkstatt reinigt der Mechaniker das Gerät mit Druckluft.
In the workshop, the mechanic cleans the device with compressed air.
Vor der Fahrradtour prüft Tom den Luftdruck in den Reifen.
Before the bike ride, Tom checks the air pressure in the tires.