water from a treatment plant is pumped into distribution system at a rate of 4.38 m^3/sec, a pressure of 480 kpa and a temperature of 20 degree celcius. The pipe has a diameter of 750 mm and is made of ductile iron. Estimate the pressure 200m downstream of the treatment plant if the pipe remains horizontal. Use the moody diagram to determine the friction factor ( you can also use the Swaimee-Jane equation). After 20 years in operation, scale buildup is expected to cause the roughness of the pipe to increase by a factor of 10. What is the effect of this on water pressure 200 m downstream of the plant? Say, Water flows at a velocity of 2m/sec in a 300 mm new ductile iron pipe. Estimate the headloss over 500m

## Calculate the temperature of flat world that has an albedoCalculate the temperature of "flat world" that has an albedo of 0.31 and a solar flux of 1370 w/m^2. One side of flat world faces the sun. Ignore energy emitted from the edge of flat world. |

## What is the isentropic efficiency of the compressorAn adiabatic argon unit compresses argon at 200 kPa and 27C to 2.18 MPa. If the Argon leaves this compressor at 513C. What is the isentropic efficiency of the compressor |

## What diameter is required if the concrete pipe is to carryA ciricular sewer is laid on a slope of 0.5%. What diameter is required if the concrete pipe is to carry 25 cfs If the desired design mean suction velocity is between 3 and 7 ft/s, is the design acceptable |

## Determine the force exerted by the jet on the plateA jet of water of diameter 75mm moving with a velocity of 25m/s strikes a fixed plates in such a way that the angle between the jet and plate is 60 find the force exerted by the jet on the plate. |

## Determine the major and minor principal stresses at failureDetermine the major and minor principal stresses at failure and the effective stress friction angle (assume c' = 0). Plot the Mohr diagram. |

## What is the annual crash rate for section of college streetOver the past 3 years, there have been 14, 13, and 15 crashes on this section of College Street. The two-way ADT on this section is 16,474 vehicles per day. What is the annual crash rate for this section of College Street |

## What would be the fraction of trucks entering the sectionConsider a highway section where traffic is stationary, all trucks travel at speed s and cars at speed v. If aerial surveillance revealed that trucks were a fraction p of the vehicles on a photograph |

## Determine the maximum shear stress in the shaftA solid steel shaft with an outside diameter of 65 mm is subjected to a pure torque of 7,000 N-m. The shear modulus of the steel is G=80 GPa. Determine a. 1 The maximum shear stress in the shaft |

## Compute the magnitues of all the forces acting on memberCompute the magnitues of all the forces acting on member CDE of the frame. There are pins at C D and E and an 80 kelp force on the right. Length measurements are in ft. |

## Determine the 2-year peak discharge prior to developmentA development is being planned within a 250-acre watershed. The present land use is 120 acres of pasture, with soil type B(CN=61), and the rest soil type D (CN=80). The Tc is 54 min. and the 2-year, 24-hour storm depth is 4 in. |

## Determine the total dead load-per foot of lengthThree-ply asphalt felt and gravel roof over 2in of insulation board is supported by 18in deep precast reinforced concrete beams with 3ft wide flanges. If insulation weights 3lb/ft 2 and the asphalt roofing weights 5.5lb/ft2, determine the total dea.. |

## Calculate the wet density in pounds per cubic feetA small chunk of the original sample had a wet weight of 140.9 grams and weighed 85.2 grams after drying. Compute the water content, using the correct number of significant figures. |

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