A hydrostatic bearing is to support a load of 1000 Ibf/ft of length perpendicular to the diagram. The bearing is supplied with SAE10W-30 oil at 212°F and 35 psig through the central slit. Since the oil is viscous and the gap is small, the flow may be considered fully developed. Calculate (a) the required width of the bearing pad, W, (b) the resulting pressure gradient, dp/dx, and (c) the gap height, if the flow rate is Q=2.5 gal/hr/ft into the paper. W h

A 200 m long pipe slopes down at 1 in 100 and tapers from 0-25 m diameter to 0-15 m diameter the pressure at th the lower end. If the pipe carries 100 litres of oil of specific gravity 0-85, find lower end. The upper end gauge reads 50 kPa. [Ans. 54-9 kP

6. A hydraulic lift (see below) of the type commonly used for greasing automobiles consists of a 280.00 mm diameter ram which slides in a 280.18 mm-diameter cylinder, the annular space being filled with oil film of thickness t = 0.09 mm, having a viscosity 0.3612 kg/(m s). If the rate of travel of the ram is v= 0.22 m/s, find the frictional resistance when 2 m of the ram is engaged in the cylinder. Take the weight of ram as 500 N. Ram Oil film -Fixed cylinder