A delta connected load with each Z = 8 30degree ohms is supplied from a balanced three phase wye connected generator through lines having series impedance of 0.25 30degree ohms. The line-to-line voltage measured at the load is 208 volts (for the angle, please use load Vab as the reference, such that Vab = 208 0degree volts). Calculate the three load phase currents (magnitude and angle). Calculate the magnitude of the line-to-line voltage at the generator. Calculate the power factor at the generator (be sure to indicate leading or lagging).

Asingle-geared blanking press has a stroke of 200 mm and a rated capacity of 320 kn. a cam driven ram is assumed to be capable of delivering the full press load at constant force during the last 15 percent of a constant-velocity stroke. the camshaft has an average speed of 90 rev/min and is geared to the flywheel shaft at a 6: 1 ratio. the total work done is to include an allowance of 16 percent for friction a) estimate the maximum energy fluctuation b) find the rim weight for an effective diameter of 1.2 m and a coefficient of speed fluctuation of 0.10

Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented

Asimple rankine cycle uses water as the working fluid. the water enters the turbine at 10 mpa and 480c while the condenser operates at 6 kpa. if the turbine has an isentropic efficiency of 80 percent while the pump has an isentropic efficiency of 70 percent determine the thermal efficiency