An alloy is evaluated for potential creep deformation in a short-term laboratory experiment. the creep rate is found to be 1% per hour at 800°c and 0.055% per hour at 700°c.
(a) calculate the activation energy for creep in this temperature range.
(b) estimate the creep rate to be expected at the service temperature of 500°c.

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

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