018 10.0 points
A fireman standing on a 6.3 m high ladder
operates a water hose with a round nozzle of
diameter 3.46 inch. The lower end of the hose
(6.3 m below the nozzle) is connected to the
pump outlet of diameter 4.98 inch. The gauge
pressure of the water at the pump is
$P_{pump}^{(gauge)} = P_{pump}^{(abs)} - P_{atm}$
$= 38.8 \text{ PSI} = 267.517 \text{ kPa}$.