A hollow steel tube has a diameter of 300 mm, wall thickness of 20 mm and a length of 500 mm. A slot 20 mm wide is machined through the wall thickness and along the whole length of the
tube. The tube is positioned on a rigid horizontal surface with the slot at one extreme of a
horizontal diameter. A force W is then applied on the upper surface along the vertical diameter
and uniformly along the length of the tube. Calculate the magnitude of this force which is
necessary to just close the slot

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false

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 ziegler nichols tuning methods the response of the controller to a step input should exhibit an s-shaped curve? a)-open loop mode b)-closed loop mode c)-both modes (open & closed) d)-none of the modes (open & closed)