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Civil and Environmental Engineering

a force acting 45 degrees below the negative x-axis is equivalent to a force acting litosphere

Civil and Environmental Engineering

A simple manometer is used to measure the pressure of oil (sp. gr. = 0.8) flowing in a pipeline. Its right limb

is open to the atmosphere and left limb is connected to the pipe. The centre of the pipe is 9 cm below the

level of mercury (sp. gr. 13.6) in the right limb. If the difference of mercury level in the two limb is 15 cm,

determine the absolute pressure of oil in the pipe in N/cm2

.

Civil and Environmental Engineering

A simple manometer is used to measure the pressure of oil (sp. gr. = 0.8) flowing in a pipeline. Its right limb

is open to the atmosphere and left limb is connected to the pipe. The centre of the pipe is 9 cm below the

level of mercury (sp. gr. 13.6) in the right limb. If the difference of mercury level in the two limb is 15 cm,

determine the absolute pressure of oil in the pipe in N/cm2

.

Civil and Environmental Engineering

¨For simplicity, take *n *= 2.0 and use the value of *f *for* *complete turbulence, as given by Eq. (8.54).

¨All pipes are cast iron, and are at the same elevation. For initial flows, assume only values of 30,15, and 0 L/s (the zeros in *dg *and *fh). *

¨If the pressure head at *a *is 40 m, find the pressure head at *d *(which might represent a fire demand, for example) neglecting velocity heads.

Civil and Environmental Engineering

¨Water flows through a pipe AB of diameter *d1* = 50 *mm*, which is in series with a pipe BC of diameter *d2* = 75 *mm* in which the mean velocity *v2* = 2 *m/s*. At C the pipe forks and one branch CD is of diameter *d3 *such that the mean velocity *v3 *is 1.5 *m/s*. The other branch CE is of diameter *d4* = 30 *mm* and conditions are such that the discharge *Q2* from BC divides so that *Q4* = ½ *Q*3. Calculate the values of *Q1,v1,Q2,Q3,D3,Q4* and *v4..*

Civil and Environmental Engineering

A new machine will cost $25,000. The machine is expected to last 4 years and has no salvage value. If the interest rate is 12%, determine the return and the risk associated with the purchase. Use present worth analysis.

Probability

0.3

0.4

0.3

Annual savings

$7,000

$8,500

$9,500

Civil and Environmental Engineering

for the following data marks of 50 students given below find U=1

Civil and Environmental Engineering

An overflow spillway with vertical u/s face is to be designed for a flood of 2100m3/s. The level of the spillway crest is at R.L of 130.0 and the river bed at R.L. of 100.0. The end walls of the spillway are 79m apart and there are 4 round-nosed piers, each 1m wide. Determine the total head over the crest. Take C=2.2 and Ka=0.1. Also tabulate the coordinates of the d/s profile

Civil and Environmental Engineering

The simple span of 6 m W shape was used as a bridge crane runway girder. Assume that the crane wheel imparts a vertical load of 60 kN and a lateral load of 6 kN at the midspan applied at the top flange of the girder. A standard rail weighing 65 kg/m will be used. Assume that the top flange is not laterally braced between end supports.

Properties of W section:

Sx = 1280 x 10^3 mm^3 Fbx = 207 MPa

Sy = 361 x 10^3 mm^3 Fby = 238 MPa

a. Draw the loading diagram (attached in the solution set)

b. Determine the bending stress along the x-axis.

c. Determine the bending stress along the y-axis

d. Determine the ratio of the actual bending stresses to allowable bending stress.

Civil and Environmental Engineering

find the volume of the region in the wedge cut from the cylinder x^2+y^2=1 by the planes z=-y and z=0.