1. What is compression ratio and how do you compute it?
Swept volume divided by clearance volume.
Compression ratio is the ratio of discharge pressure to intake pressure. You simply divide intake by discharge pressure to get your ratio.
pnuematics used in low power applications and not suitable for high sterting loads,slow speed ,cheaper air is available
Hydraulics and Pneumatics - A Technician's and Engineer's Guide (2nd Edition)
Ratio of clearence volume to the swift volme.