If the velocity profile of a fluid over a plate is a parabolic ( =
2 + + ), with the vertex
20 from the plate, where the velocity is 120 /., as shown in the below Fig. Calculate the
velocity gradients

, and shear stresses at a distance of 0, 10, 20 from the plate, if the
viscosity of the fluid is 8.5 .

Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.

Inspection for bearing condition will include: (clo4) a)-color b)-smell c)-size d)-none of the above

Amixture of slurry and mud is to be pumped through a horizontal pipe of diameter 500 mm. the fluid behaves as a bingham plastic with a yield stress of 30 pa and viscosity 0.04 pa. s. describe the effects of the shear stress through a transverse section of the pipe by plotting the variation in shear stress and velocity profile: (i) just before the slurry starts to move (ii) as the slurry flows when the pressure gradient is double that in part (i)