Afire protection association code requires a minimum pressure of 53 psi at the outlet end of a 250-ft-long, 4.0 in diameter hose when the flow rate is 500 gal/min.

what is the minimum pressure allowed at the pumper truck that supplies water to the hose? assume a roughness of 3=0.03in.

For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater