Why are dynamic heads greater than static heads?
1. because static suction lifts are limited in vertical lift
2. because the friction losses are always greater than the
static heads
3. because they are measured on the discharge side of the
pump
4. because they include the static heads plus the friction
losses in the suction and discharge pipes

An open feedwater heater operates at steady state with liquid entering at inlet 1 with t? = 40°c and pl = 1 .2 mpa. water vapor att2-200°c and p2 = 1.2 mpa enters at inlet 2. saturated liquid water exits with a pressure of pa 1.2 mpa. neglect heat transfer with the surroundings and all kinetic and potential energy effects, determine the mass flow rate of steam at inlet 2 if the mass flow rate of liquid water at inlet 1 is given as 2 kg/s.