Water at 20 °C flows at 3 m/s in a tube with a diameter of 50 mm. a) What is the pressure drop over 30 meters if the walls of the tube are smooth? Water at 20 °C flow at 3 m/s in the annulus of a concentric tube heat exchanger. The inner wall of the annulus has a diameter of 25 mm and the outer wall a diameter of 50 mm. What is the pressure drop over 30 meters if: b) The walls are taken as smooth? c) The walls are made of commercial steel?

Aflywheel accelerates for 5 seconds at 2 rad/s2 from a speed of 20 rpm. determine the total number of revolutions of the flywheel during the period of its acceleration. a.5.65 b.8.43 c. 723 d.6.86

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

Which of the following components of a pid controlled accumulates the error over time and responds to system error after the error has been accumulated? a)- proportional b)- derivative c)- integral d)- on/off.