Problem 1 A compressor delivers 180 scfm of air through a 3/4-in schedule 40 pipe at a receiver pressure of 85 psig. Find the pressure loss for a 170-ft length of pipe Hint: Use the table shown if needed. Nominal Pipe Size (in) Inside Diameter Inside Nominal Diameter d (in) 05.31 Pipe Size (in) d(in) $31 0.493 0.0234 1+ 1.610 12.538 0.622 0.0804 2 2.067 47.256 0.824 0.3577 2 2.469 121.419 1.049 1.2892 3 3.068 384.771 1.380 5.5304 3.548 832.550 Tabulated values of d and d for schedule 40 common pipe Problem 2 A compressor delivers 2000 cfm of air through a pipe at a receiver pressure of 140 psig. What minimum size schedule 40 pipe should be used if the pressure loss is to be limited to 0.10 psi per foot of pipe length? Hint: use the table of Problem 1 if needed. Problem 3 For the circuit shown, cylinder 1 will not hold against a load while cylinder 2 is retracting. Modify this circuit by adding a pilot check valve and appropriate piping so that cylinder 1 will hold while cylinder 2 is retracting. Show the modified circuit schematic. Figure for Problem 3