1. The problem statement, all variables and given/known data Right now, im learning fluids and this question is just asking if i should use either hydraulic or pneumatic fluid for a device that will be able to lift a large fluid. 2. Relevant equations For pneumatic systems, flow rate is most often expressed as standard cubic feet per minute (SCFM) or normal liters per minute (nL/min) 3. The attempt at a solution well i know hydraulic uses oil and pneumatic uses air. I think air is used to lift things up but i think pneumatic is stronger.