An 80-percent-efficient pump with a power input of 20 hp is pumping water from a lake to a nearby pool at a rate of 1.5 ft3/s th
rough a constant-diameter pipe. The free surface of the pool is 80 ft above that of the lake. Determine the mechanical power used to overcome frictional effects in piping.
Ventilation strategies fall into three general categories: Natural Dilution Ventilation (least effective) Mechanical Dilution Ventilation. Local Exhaust Ventilation (most effective)