1. A hydraulic pump is shown in Figure 1, flow rate is 25 L/min, the diameter of suction pipe is 25mm, and the suction port of pump is higher than the oil surface of tank, h= 400mm. Kinematic viscosity of oil is 30×10--m?/s, density of oil is 900kg/m³. If only the pressure loss along the straight suction pipe with length 500mm 75 is considered, calculate the vacuum degree of suction port. (2 =, a=2) R, Figure 1

5. The below figure shows a pipe with a circular cross section of diameter D= 10 cm. Water enters the left end with a velocity 3 cm/s. The dynamic viscosity of water is 8.90 × 10-4 Pa·s, Find the type of flow. a. No flow b. Laminar flow с. Transitional flow d. Turbulent flow

1. A piston-cylinder is producing a viscous oil flow, which has the flow rate of Q, radius R=1.5 mm, and stroke L-5 mm. The fluid density is p = 800 kg/m³ and the viscosity is μ = 0.5 Pa-s. The pressure to drive the flow is p=6.25 Pa. a. How many non-dimensional groupings can be obtained? Derive them. b. If the flow transitions at Re = PV(2R) =2300. Is the generated flow laminar or turbulent given Q=20 mL/s? LL c. Assume the pressure gradient is uniform on the cross-section and can be calculated using OP=-. The velocity profile in the cylinder is u(r) = ax - [1-(²]. Sketch the velocity profile. Calculate the shear stress at the R² ap 2UÔI cylinder wall and label the direction. d. Calculate the flow rate Q with the velocity profile in (c).. e. If the shear stress is uniform over the cross-section, i.e. T = C, what's the pressure gradient distribution and sketch it? L L. R

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at point a in pipeline carrying water, the diameter is 1m, the pressure is 98kPa and the velocity is 1m/s. at point B, 2m higher than A, the diameter is 0.5m and the pressure is 20kPa. Determine the direction of flow.   need answer please

A fan has a suction static pressure of 40mm of water vacuum with air velocity of 5m/s. The discharge has 160mm of water gage and discharge velocity of 9m/s. What is the total head of the fan if air density is 1.2kg/m3, mm of water gauge. Answer: 203.43

Q(in) is a constant inflow which maintains the water level in the tank. Find the horizontal force needed to hold the tank stationary.  If you could make any notes on steps in the method to make it clearer that would be great too. Thanks in advance!

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