Assume that a two-lane small road crosses a two-lane main road at a right angle making a four-leg intersection where the traffic on the small road controlled by a yield sign. A shopping mall is located 108.24 ft from the centerline of the outside lane of the main road and 12 m from the centerline of the nearest lane of the minor road. Determine the maximum velocity (in km/h) that can be allowed on the small road if the speed limit on the main road is 39.77 mph. Grades of both the roads are leveled.

Q9. A Waste water treatment units is proposed to be designed for the Wilayat of Sur. Population of Sur is 200,000 and an average sewage generation is 210 liter per capita per day. Design an appropriate waste water treatment plant using the following given data. If needed assume other necessary data.

Approach channel velocity = 42 m/min, d = 1.5 w Design three aerated grit chamber Detention time in grit chamber = 3 min Depth of aerated grit chamber = 2.0 m Depth to width ratio in aerated grit chamber is 1:1.2 Total depth of primary clarifier = 3 m (Mechanical Sludge removal) Overflow rate = 20 m3/m2.d Detention time in the primary clarifier should be greater than 1.5 hours Secondary clarifier with a depth of water equal to 0.5 times the Length (Mechanical Sludge removal) Detention time in secondary clarifier = 2 hours

a. List and explain briefly the important parameters to be analyzed for the waste water before and after treatment. (2)

b. Is waste water treatment is compulsory before disposing it to the land? Justify. (2)

c. What is meant by sludge? Is sludge resource or waste? Explain. (2)

d. Why is the aeration tank followed by primary sedimentation process? (2)

e. Design (size of the unit) the following units of the treatment process: Rectangular Bar screen channel, Rectangular Aerated Grit chamber, Six Circular Primary Clarifier, and Six Square Secondary Sedimentation tank.   

Identify and describe a primary building material used for the construction of a single story commercial building. Why would this material be selected over the other primary materials we discussed this semester?(Wood, Concrete, and steel)

Items of importance in your discussion include:

-relative cost for this project to other materials for this kind of project

-material handling and assembly

-methods available to speed up material assembly time on site

Sir,
Matlab code for thick cylinder lined with composite which is related to Mechanics.

The design of shallow foundation is governed by the bearing capacity of soil. The bearing capacity of soil is the maximum average contact pressure between the foundation and the soil which should not produce shear failure in the soil. However, some cases at site, the suitable bearing capacity only can be found at 3 m depth from the surface or more. Based on your understanding, discuss this situation and how to resolve the issue in perspective as a consultant engineer

A horizontal pipe has an abrupt expansion from D₁ = 8 cm to D₂ = 16 cm. The water velocity in the smaller section is 6 m/s and the flow is turbulent. The pressure in the smaller section is P₁ = 418 kPa. Determine the downstream pressure P₂ in kPa.

1. The cross section of a non- overflow gravity dam is as given below:

Top width                   -    12 m

R.L of top of dam       -    + 215 m

R.L of bottom of dam -    + 104 m

FRL                            -    + 212 m

No tail water

Upstream face is vertical

Downstream face is vertical till a R.L of + 205 m, after which it has a slope of 0.7 H:1 V up to the base

Drain holes are located at a distance of 7 m from the heel

Unit weight of dam material as 24 kN/m²

Calculate the forces acting and moment about the toe due to self weight and uplift indicating their nature. Indicate the line of action of the forces on the figure

1. How does the eccentricity ratio (e/h) affect the selection of the type of columns (spiral vs tied column)

2.What is the Behavior of spiral and tied columns when axially and eccentrically loaded

3.Why is it important to provide adequate thickness for a footing?

What are some of the key factors and risks that should be considered when tendering for a project?

Please explain about both new factors & risks with examples

What will be the width (B in meter) of a square footing to support rectangular column 40x40 cm and carries a dead load of 614 kN and live load of 477 kN. The net allowable bearing pressure is 180 kPa. The design should be according to (ACI) code with the following parameters: fc’ = 28 MPa, fy = 420 MPa.

What are the uses of compaction tests?

What are the short-term and long-term effects on the environment that can arise from the construction of dams?

Connect each classification of cement to its description. Then connect each description to the correct use of cement. (15 Points)

Find the ultimate bearing capacity using Terzaghi for the given foundation located at 4.8m below ground. Water table at 2.2m below ground.

Soil A has H= 1.8m ɣ=15KN/m³, C=35 KN/m², ɸ= 25, and e= 0.42.

Soil B has H= 3.0m ɣ=16KN/m³, C=45 KN/m², ɸ= 35, and e= 0.49.

Before the foundation was laid compaction was done on both soils where results were

Soil A has ɣ_max=18KN/m³, optimum water content 11% and e=0.26.

Soil B has ɣ_max=20KN/m³, optimum water content 13% and e=0.29.

The foundation is 2.8x2.8m and its loosest void ratio for both soils are 0.90 and 0.82, respectively