by balotpinoy
 P: 12 a pump capacity of 10 m^3/hr at 30 meters head. what does the 30 meters head mean? thank you..
 P: 785 The pump increases the pressure downstream, relative to the pressure upstream. The 30 meters head is the difference in pressure 'across' the pump (discharge pressure minus suction pressure). Pressure (force per area) can be expressed in height (meters) by considering the pressure at the base of a column of the pumped fluid 30 meters tall. To change the units of 'head' to units of 'pressure' you need to know the weight density of the fluid.
 P: 12 so can i use it in Bernoulli's equation as work given to the fluid? - head x density x gravitational constant is that right?
P: 785

Right. $$V^2/2g$$ $$z$$ $$P/\rho g$$ all have units of length.
And if you multiply each by $$g \rho$$ you get units of pressure