A municipal wellfield is designed to consist of five water-supply wells, each rated at 16 litre/s. The wells are located 100 m apart along a north-south line and fully penetrate a 20m thick confined aquifer that has a transmissivity of 1000m2/day. . Estimate the maximum drawdown 500m west of the centre well assuming that all wells are 40cm in diameter and the radius of influence of each well is 800m. [15 Marks] 4b. If the calculated drawdown value is considered too low, propose 3 design options to ensure an increased drawdown.

Compute the settling velocity for the following particles: very coarse sand ( diameter = 1.5 mm ) , (diameter=1.5 mm), medium sand (0.4 mm), very fine sand (0.075 mm), and clay (0.001 mm). Estimate the time for each particle to fall 6 in. in water.

Assume: SG: coarse sand = 2.65, medium sand = 2.67, fine sand = 2.70, clay = 2.8 & water temperature = 60°F

Note:The other solution on chegg is wrong.

Using the regime-theory method, design a channel to carry wastewater from a manufacturing plant. Assume a design discharge of 950 ft3/s.950 ft3/s. The channel will have a sand bed and banks. Use a Manning’s roughness coefficient of 0.025.

Assume: Water Temp = 60°F, slope = 0.25%

▪ Describe the engineering aspects of two of MOSE Project and Thames Barrier
▪ Describe how fluid mechanics govern the design of these protection structures

A two-dimensional transient velocity field is given by

u = ax(b + ct)               v = ey(f+ ht)

where u is the x velocity component and v, the y component. Find:

1. The trajectory x(t), y(t) if x = x0, y = y0 at t = 0.
2. The streamline that passes through x0, y0 when t=0 and plot it.
3. The acceleration field.

a (-) = 5

b (1/s) = 5

c (m) = -1

e (-) = 5

f (1/s) = 5

h (m) = 4

x₀ = 1

y₀ = 2

A contractor provides you with a 5-gallon bucket sample to test the concrete. You observed that the entire chute was diverted three separate times in the middle of the concrete truck. Is this an adequate sample to cast two concrete cylinders? Why or why not?

Research (Literature Review):
[Search the net, see if there are paper towers that have already been made, what is unique in these towers. Select one idea from the net and explain its design. Provide a picture of the design.

please mention also the advantages and disadvantages of the design you choose it

If a bridge is above a river approximately 10 miles from the sea with a bridge deck of 170m

What type of concrete is should be used? will it be sulphate resistant concrete or high performance concrete or any other?

What will the Eurocode exposure class be ? will it be XS1 or XD1? or something else?

Will it be EN206/BS8500 type of concrete?

Machine guards are barriers used to prevent the entry of any part of the human body into the moving equipment. Safety devices are controlling devices that stop or interrupt the machine’s operation when a part of the human body accidentally touches the machine. Write a short note on it various types of machine guard and sensors used in oil and gas industry (each 2.5 marks).

Electricity is the energy created by the movement of charges particles such as electrons, positrons and ions. Use of electricity has the potential to be hazardous with possible fatal results like electric shock, electric burns, electrical explosion and static electricity. What according to you can be causes of electric shock, static electricity (each 2.5 marks)?

List the various standards that are used in oil industry related to safety. What is the use of respirators and fall protection in oil industry? Mention its use, working principle (each 2.5 marks)

What are various certificates that are attached to work permit. List any five with its importance in oil and industry (each one mark).

500 mm thick square footing is to be placed at a depth of 0.5 m in a clayey sand where c¢ = 10 kPa, f¢ = 34°, g = 19.0 kN/m3. The column load to be applied on the footing is 2000 kN. What should be the width of the footing? please show each steps with how you solved to obtain value of B