Statement D about pneumatic systems is true. Pneumatic systems are cleaner than hydraulic systems.
Pneumatic systems are employed in a wide range of manufacturing and assembly applications. They can be used to transport objects on production lines as well as in maintenance facilities.
In hydraulic systems liquid is used as fluid for the force transmission. While in the pneumatic system air is used causing more cleanliness in the system.
The pneumatic systems are cleaner than hydraulic systems.
Hence, a statement D about pneumatic systems is true.
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