# Ch8HW - 3/s the maximum pressured of 12.1psig located at elevation =44ft the minimum pressured of-3.03 psig located at elevation =95ft entrance =

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CSUS ENGR132 ZHOU HOMEWORK #8 1. If the pump efficiency is 80%, what power must be supplied to the pump in order to pump fuel oil (S = 0.94) at rate of 1.2m³/s up to high reservoir? Assume a steel pipe & v =5 × 10 ିହ m²/sec. (Answer: 386kW) cm r entrance 5 . 0 = 2. Water is pumped at a rate of 25m³/s from the reservoir and is put through the pipe, which has a diameter of 1.50m. Entrance radius r is assumed big as 0.5m. What power must be supplied to the water to effect this discharge? (Answer: 14.7MW) 3. Determine the discharge of water through the system shown. In addition, for the system, where the maximum and minimum pressure could locate? Calculate the maximum and minimum pressures in the system. (Answer: 17.8ft

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Unformatted text preview: 3 /s; the maximum pressured of 12.1psig located at elevation =44ft; the minimum pressured of -3.03 psig located at elevation =95ft entrance). = r/D entrance 2 / = D r ratio radius bend = CSUS ENGR132 ZHOU 4. The velocity of oil (S= 0.8) is 5 ft/s, flowing through a 2 in. smooth pipe from ݖ ଶ = 4 ft to ݖ ଵ = 2ft. Here L = 30 ft and the manometer deflection is 4 in. Determine the viscosity of the oil. (Answer: 0.00154 lbf.s/ft 2 ) 5. Consider the mean velocity profiles for flow in the pipes shown. Match the profiles with the following: (a)Turbulent flow; ( b) Case of hypothetical flow(zero viscosity); (c) Laminar case (d) α = 1.0 ; (e) α = 1.05; (f) α = 2.00...
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## This note was uploaded on 05/22/2011 for the course ME 132 taught by Professor Dongmeizhou during the Spring '11 term at CSU Sacramento.

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Ch8HW - 3/s the maximum pressured of 12.1psig located at elevation =44ft the minimum pressured of-3.03 psig located at elevation =95ft entrance =

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