The following measurements were made at a potential site for a wind farm: The turbines have blade length of 20 m, overall efficiency is 0.3 (constant for all wind speed), the density of air is 1 kg/m3. a) A wind turbine has a cut-in speed at 3 m/s and a cut-out speed at 7 m/s. Find the average speed which the turbine operates at and the average power produced by the turbine. 1 Speed (m/s) hours 0 2 4 6 8 10 100 300 100 200 200 100 b) The cut-out speed of the turbine is improved to 9 m/s. Find the new average speed and the average power produced.

When at a point two solid phase changes to one solid phase on cooling then it is known as a) eutectoid point b) eutectic point c) peritectic point d) peritectoid point

Line joining liquid phase with liquid and solid phase mixture is known as: a) liquidus b) solidus c) tie line d) none of the mentioned

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