A pneumatic subsystem is used to ___________

A)
more pressure output
B)
deflect control surface
C)
provide electrical power
D)
provide compressed air for pressurization

Correct Answer :   provide compressed air for pressurization


Explanation : A typical pneumatic system is used for operation requiring less amount of power or pressure. It is used to provide compressed air for pressurization of the aircraft. More pressure output can be achieved by using hydraulic system.