Use the following data to calculate total circulation pressure and ECD for flow rate of 450 gpm. 0600= 64 0300= 35 Mud Weight = 12.9 ppg OD=5in. L = 7200 ft L = 800 ft ID=4.276in. D/P: D/C: Bit Size = 7-7/8 in. OD=7in. ID = 2.5in. Bit Nozzles = 12 - 13 – 13 Solve it as Bingham fluid

*hydraulics *use handwritten    A trapezoidal flume of most efficient proportion has a base of 1.5 m. Its full discharge is 3 m^3/s, If the same material is used for a most efficient rectangular section, Compute the decrease in the discharge.   Choices: A. 0.44 m3/s B. 0:54 m3/s C. 0.64 m3/s D. 0.74 m3/s

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4. A. Find the discharge in stream flow for the following data B. Find manning coefficient at slop 0.01% and flow 15m³/s (20 marks) Distance from bank(m) 1.5 Depth of water (m) 1.3 2.5 Velocity at depth 0.2(m/s) 0.6 0.9 Velocity at depth 0.8(m/s) 0.4 0.6 3596 4100 5775 4.5 9 7.5 1.7 1.0 0.4 0.7 0.6 0.4 0.5 0.4 0.3 9000