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1.A water pipe gradually changes from 6" to 8" diameter accompanied by an increase of elevation of 10'. If the pressures at 6" and 8" sections are 9 psi and 6 psi respectively, what is the direction of flow: (a) for 3 cfs and (b) for 4 cfs?
2.For a triangular channel of z=2 side slopes tha tcarries a discharge of 100 cfs at a depth of 5 ft, determine the channel slope S under the assumption that normal flow exists and that n equals 0.022. Assume that the channel is dug in sand, check if it is susceptible or deposition.
3.Determine the energy loss due to the gradual enlargement from a 25 mm pipe to a 75 mm pipe when the velocity of flow is 3 m/s in the smaller pipe and the cone angle of enlargement is 20°C.
A sag vertical curve along an existing vertical alignment begins at station 23+45 and ends at station 30+25. The initial grade coming into the curve is -2% and the grade out is +5%. What is the finished grade elevation on the curve at station
A structural element subjected to cyclic loading is made of fc' = 3000 psi concrete. Compressive stresses are changing between 2200 psi and 1600 psi. The frequency of loading is 8 Hz.
A particle is traveling along a circular curve having a radius of 13 m. If it has an initial speed of 21m/s and then begins to decrease its speed at the rate of at = (-0.25s)m/s2
In the construction of a two-span bridge (span length = L) by using span-by-span construction, why is a length of about 1.25L bridge segment is constructed in the first phase of construction?
A W410 X 0.83 steel section is used in a10 m simple span. Determine the maximum allowable uniform load what the beam can carry if the allowable flexural stress is 165MPa, the allowable shear stress is 100 MPa, and the allowable deflection is 1/360 of..
A single strain gage is cemented to a solid 4-in diameter steel shaft at an angle B = 25 degrees with a line parallel to the axis of the shaft. Knowing that G = 11.6*10^6 psi, determine torque T indicated by a gage reading of 300*10^-6 in/in.
Calculate the super-elevation required for a horizontal curve on a two-lane, two- way highway with 60 mph design speed, and a 1200 ft. radius curve. What is the required length of the spiral curve
Determine the deflection angle to the last full station on a horizontal curve with Da=3 degrees. The PI is located at station 12.20 and the central angle is 24 degrees.
Vehicles arrive at the booth at a rate of 4 vehicles per minute. The attendent opens the booth and improves the service rate over time following the function u(t)= 1.1 +0.3t, where u(t) is in vehicles per minute and t is in minutes.
When 0.3 m^3/s water flows through a 150 mm constriction in a 300 mm horizontal pipeline, the pressure at a point in the pipe is 345 kPa, and the head loss between this point and the constriction is 3 m.
After initial mixing, the DO concentration in the river is 9.5mg/L and the temperature is 15ºC. If the ultimate BOD of the mixed river water is 30mg/L,
A rectangular channel 2.0 m wide carrying a discharge of 2.5 m3/s is to be fitted with a weir at its downstream end to provide a means of flow measurement as well as to cause heading-up of the water surface.
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