The process being described is Compression, where the volume of a gas is reduced by increasing its pressure.
The process being described in the question is Compression.
Compression is the process of reducing the volume of a gas by increasing its pressure. In this case, oxygen is being pumped into a special room at a higher pressure than what it is stored in the tanks. This results in the gas being compressed.
In the given scenario, the oxygen is initially stored in tanks at a pressure of
then pumped into a room maintained at a pressure of
ompression process increases the pressure of the oxygen gas.