A hydropower facility is being planned for construction 5 miles southwest of the town of Winnemucca, Nevada. The water surface of the Lahontan Reservoir will average 75 meters above the tailrace with a riveted steel penstock 300 meters long and a diameter of 1.7 meters. With an average water temperature of 20C, the flow rate provided by the penstock is to be 16m3/s with a combined head loss in the turbine, located slightly more than 3 meters above the tailrace, and draft tube of 2.0 meters and an average velocity in the tailrace of 0.5 m/s. Your role in the planning process is to determine the effective head that will be supplied to the turbine and the amount of power that can be extracted from the system.

Amixture of slurry and mud is to be pumped through a horizontal pipe of diameter 500 mm. the fluid behaves as a bingham plastic with a yield stress of 30 pa and viscosity 0.04 pa.s. describe the effects of the shear stress through a transverse section of the pipe by plotting the variation in shear stress and velocity profile: (i) just before the slurry starts to move (ii) as the slurry flows when the pressure gradient is double that in part (i)

The proportional limit is always greater than the yield strength for a material. a)-trune b)- false

Tom is having a problem with his washing machine. he notices that the machine vibrates violently at a frequency of 1500 rpm due to an unknown rotating unbalance. the machine is mounted on 4 springs each having a stiffness of 10 kn/m. tom wishes to add an undamped vibration absorber attached by a spring under the machine the machine working frequency ranges between 800 rpm to 2000 rpm and its total mass while loaded is assumed to be 80 kg a) what should be the mass of the absorber added to the machine so that the natural frequency falls outside the working range? b) after a first trial of an absorber using a mass of 35 kg, the amplitude of the oscillation was found to be 10 cm. what is the value of the rotating unbalance? c) using me-3.5 kg.m, find the optimal absorber (by minimizing its mass). what would be the amplitude of the oscillation of the absorber?