1. How heavy an object can be lifted with a suction cup having a lip with a 7-in. outside diameter and a 6-in. inside diameter if the vacuum pressure is
a. -8 psig
b. A perfect vacuum Assume a factor of safety of 3.
2. A pneumatic vacuum lift system bas a total volume of 5 ft3 inside the cup and associated pipeline leading to the vacuum pump. The vacuum pump produces a flow rate of 3 scfm when turned on. The desired suction pressure is 5 psia and atmospheric pressure is 30 in Hg abs. Determine the time required to achieve the desired suction pressure.