Question: You are designing an air delivery system to supply three hand-held rock drills requiring 110 cu ft/min (3.1 m3/min) each. The receiver of the air compressor will be operated at 110 psig (785 kPa). The fixed air supply system will consist of 1400 ft (427 m) of pipe and a manifold. Each drill will be connected to the manifold by 80 ft (24.4 m) of l-in. (2.5-cm) hose. Manifold pressure loss is rated at 2.5 psig (17.2 kPa). Determine the minimum size of pipe required to maintain a pressure of at least 90 psig (621 kPa) at each drill when all drills are operating simultaneously. Assume a 7% line leakage.