The chilled water system for a 25-story building has a pump located at ground level. the lost head in a vertical riser from the pump to an equipment room on the twenty-fifth floor is 30 ft (9 m) of water, and the pump produces 250 ft (76 m) of head. what is the pressure on the suction side of the pump for a pressure of 8 psig (55 kpa gage) to exist in the riser on the twentyfifth floor

What difference(s) did you notice using a pneumatic circuit over hydraulic circuit. explain why the pneumatic piston stumbles when it hits an obstacle.

Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.

The drive force for diffusion is 7 fick's first law can be used to solve the non-steady state diffusion. a)-true b)-false