Question: The piston-cylinder arrangement in Problem was designed and rated with an internal pressure of 7.50 MPa. Prior to shipping, the cylinder is tested by increasing the internal pressure to 3.0 times the design pressure (safety factor of 3.0). What maximum force in new tons must be applied to the piston to hold it stationary during the test?
Problem: Air in a piston-cylinder configuration is heated until an external force of 1 025 lbf is required to hold the piston stationary. If the piston diameter is 2.85 inches, what is the pressure exerted by the air normal to the piston face (in lbf /ft2)?
