F DP ////// block is initially@fest find speed 55 _ 77 W=20lb, P=272 M5=14, MK=13
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- Equation 6.16: εT = ln(li / l0)fluid mechanics In order to prevent flooding in irrigation areas and to direct the water back to the river or waterbed, the flat cover system given below is preferred. The weight of the cover is 871 kg. The square section cover is hinged 1m above the center of the cover (a = 0.25 m) and b = 1.5 m. The cover has a vertical angle of 40 What should be the maximum water head (h) according to the instructions so that the cover does not open? (psu=1000kg/m3)Answer is = (Re = 10.17 x 10^6, Turbulent)
- Problem 1a=140b = 290h = 235r = 93A water pump is used to pump water from one large reservoir to another large reservoir that is at a higher elevation. The free surfaces of both reservoirs are exposed to atmospheric pressure, as sketched in Fig. The dimensions and minor loss coefficients are provided in the figure. The pump’s performance is approximated by the expression Havailable = H0 − aV.2 , where shutoff head H0 = 24.4 m of water column, coefficient a = 0.0678 m/(Lpm)2 , available pump head Havailable is in units of meters of water column, and capacity V. is in units of liters per minute (Lpm). Estimate the capacity delivered by the pump. A3.A cylindrical shaft of radius 4 cm is rotating at a speed of 30 rad/s in a cylindrical bearing . Shaft and bearing are concentric . The lubricant of viscosity 0,4 Pa s and SG= 0,85 completely fills the clearance between shaft and bearing surface. Take clearance as 0,5 cm and length of shaft as 10 cm . The lubricant flow is laminar steady and uniform .Frictional power loss due to shaft rotation is ?
- Calculated f) as 4690 l/s, g) as 1.29m/s and h) as 293.89 bar. How to calculate i) average velocity of flow at cross section 4CORRECT LETTER PLS 1. In laminar flow, which is correct?BJ: higher Re value has higher friction factorJB: lower Re value has higher friction factorGroup of answer choices A. BJ is false and JB is true B. BJ is true and JB is false C. BJ is false and JB is false D. BJ is true and JB is true 2.In turbulent flow, which is correct?BJ: higher Re value has lower friction factorJB: lower Re value has higher friction factorGroup of answer choices A.BJ is true and JB is true B.BJ is false and JB is false C. BJ is false and JB is true D. BJ is true and JB is false 3. In a system with 4 reservoirs and 1 pipe junction, how many continuity equations are formulable?Group of answer choices A. 2 B. 3 C. 5 D. 4 E. 1In Fig. let y1 = 95 cm and y2 = 50 cm. Estimate thefl ow rate per unit width if the upstream kinetic energy is(a) neglected and (b) included.
- 1.A cylindrical shaft of radius 5 cm is rotating at a speed of 50 rad/s in a cylindrical bearing . Shaft and bearing are concentric . The lubricant of viscosity 0,6 Pa s and SG= 0,9 completely fills the clearance between shaft and bearing surface. Take clearance as 0,5 cm and length of shaft as 10 cm . The lubricant flow is laminar steady and uniform .The lubricant flow rate in kg/s is ? ANSWER: 1,767 kg/s 2.A cylindrical shaft of radius 5 cm is rotating at a speed of 50 rad/s in a cylindrical bearing . Shaft and bearing are concentric . The lubricant of viscosity 0,6 Pa s and SG= 0,9 completely fills the clearance between shaft and bearing surface. Take clearance as 0,5 cm and length of shaft as 10 cm . The lubricant flow is laminar steady and uniform . Frictional force on shaft surface is ? ANSWER: 9,42 N 3.)A cylindrical shaft of radius 5 cm is rotating at a speed of 50 rad/s in a cylindrical bearing . Shaft and bearing are concentric . The lubricant of viscosity 0,6 Pa s and SG=…A water pump is used to pump water from one large reservoir to another large reservoir that is at a higher elevation. The free surfaces of both reservoirs are exposed to atmospheric pressure, as sketched in Fig. The dimensions and minor loss coefficients are provided in the figure. The pump’s performance is approximated by the expression Havailable = H0 − aV.2 , where the shutoff head H0 = 125 ft of water column, coefficient a = 2.50 ft/(gpm)2 , available pump head Havailable is in units of feet of water column, and capacity V. is in units of gallons per minute (gpm). Estimate the capacity delivered by the pumpAir conditioning is provided by chilled water (at 10 oC) pumped through a main supply pipe. The pipe makes a loop 3 km long, and you can make a crude assumption that the loop has four smooth flanged 90o elbow bends per km (all other minor losses may be neglected). The pipe diameter is 35 cm outer diameter, with a wall thickness of 0.5 cm, and is made out of commercial steel. The maximum design volume flow rate is 2000 L/min. The circulating pump is driven by an electric motor. The efficiencies of pump and motor are ηpump = 0.80 and ηmotor = 0.90 respectively. Electricity costs R1.36 per kWh. Determine the head loss through the system