Problem 1Oil, with density of 900 kg/m³ and kinematic viscosity of 0.00001 m²/s, flows at 0.2 m³/s through 500 mof 200-mm-diameter cast-iron pipe (roughness: 0.26 mm). Determine the head loss (in m) and pressuredrop (in kPa) if the pipe slopes down at 10° in the flow direction. Assume α = 1.0 throughout.

Answered: Image /qna-images/answer/2c760a74-4580-40da-ad81-56875504dafb.jpg

Answered: Problem 1 Oil, with density of 900…

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter8: Seepage

Section: Chapter Questions

Problem 8.12P

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Figure shows that the pipe flow of 50 m^3/hr, is driven by pressurized air in the tank. a) Determine the head loss in the “smooth” pipe in meters if the friction factor is 0.014. b) What gage pressure p1 in kPa, is needed to provide the given flow rate?
1. A pipe has a slope of 1 in 100 and its length is 300 meters. Its diameter is 0.6 meter at the lower end while 1.2 meters at the higher end. The rate of flow through pipe is 5400 liters/min. Find the pressure at the lower end if the pressure at higher end is 68.07 kPa. Neglect losses.
A smooth pipe with a constant diameter 0.20 m carries water at a temperature of 30oC (Refer Table Q4(c)). The Pipe pressure at section 1 and section 2 is 50 kPa and 20 kPa, respectively. Section 1 is located 2 m lower than section 1. Determine the head loss in the pipe.
Oil with sp. gr. 0.95 flows at 200 lit/sec through a 500 m of 200 mm diameter pipe (? = 0.0225). Determine (a) the head loss (m) and (b) the pressure drop (kPa) if the pipe slopes down at 10⁰ in the direction of flow.
A horizontal, circular pipe connects two big reservoirs, 1 and 2. The length of the pipe is 100 m. The pipe diameter is suddenly increased from 300 to 600 mm at the midpoint between the two reservoirs. The loss coefficient at the pipe entrance is 0.50. The frictional coefficients in the smaller and larger pipes are 0.030 and 0.020, respectively. The water flow rate, Q, is 18 m3/min. Calculate the water surface height difference, H.
Water flows from left to the right reservoir at a rate of 16 ft3/s (cfs). The head loss can be calculated as hL = 0.02(L/D)(V 2/2g), where L is the length of a pipe and D is the diameter. Determine the water surface elevation of the left reservoir.
A flow of water of 100 lt/sec flowing through rectangular tube of width 600 mm and having adjustable bottom slope with C = 56. Find the bottom slope required for uniform flow of depth 300 mm. Also, determine the convience of fume.
A 300 mm diameter pipe discharges water at the rate of 200 li/s. Point 1 on the pipe has a pressure of 280 kpa and 3.4 m below point 1 is point 2 with a pressure of 300 kpa. Compute the head loss between points 1 and 2 in meters.
For the two-dimensional flow system shown below (units in meters):Compute the total flow rate under the Dam. X = 4, Y = 8. Note 1: Point A is located in the middle point of the equipotential lines. Point B is located in the middle point of the flow lines.Note 2: Assume e=0.8 (void ratio) and k=10^-3 cm/s (coeff. of permeability).Note 3: Datum is located at the bottom level of the water (right side of Dam).Note 4: Remember, the figure is drawn to scale. So, use the value of 2X+Y to estimate any dimension that you consider necessary.
The total head loss in the pipe system shown in Fig. 2 is 15m. Assuming f=0.02 for all the pipes, determine the discharge (cu. m/sec) in: a) pipe 1 b) pipe 2 c) pipe 3
A pipe of length L = 500 m, diameter D = 300 mm and absolute roughness k = 0.02 mm transports a flow Q = 456 m3/h. Using the Darcy-Weisbach formula determine the hydraulic gradient and headloss through the pipe. The water temperature may be assumed to be 20° C.
Two reservoirs are connected by a pipeline which is 150 mm in diameter for the first 6 m and 225 mm in diameter for the remaining 18 m. The entrance and exit are sharp, and the change of section is sudden. The water surface in the upper reservoir is 6 m above that in the lower. Tabulate the losses of head which occur and calculate the rate of flow in m3/s. Friction coefficient f is 0.01 for both pipes.

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