A shaft carries three masses A,B and C. Planes B and C are 60cm and 120cm from A. A, B and C are 50kg, 40kg and 60kg respectively at a radius of 2.5cm each. The angular position of mass B and mass C with A are 90° and 210° respectively. Find the unbalanced force and couple(Use A as reference plane). Also find the position and magnitude of balancing masses required at 10cm radius in planes L and M midway between A and B, and B and C(Use L as reference plane).

what and how usually project manager, developer and contractor discuss about a project's drawing. what the common problems in the drawing and how they solve it.

(a) Discuss the role of an efficient public transport system in the economic
development of a region.
(b) Discuss the quality of a public transport system as expected by the users.

A stone is thrown vertically up from the top of a tower with a certain initial velocity. It reaches ground in t seconds .(7.65). A second stone, thrown down from the same tower with the same initial velocity reaches ground in 3.6 seconds. Determine (i) the height of the tower, and (ii) the initial velocity of the stones.                         

A community living on an island off the west coast of Scotland is interested in meeting its electricity needs using marine renewable energy. Critique the standard approach for assessing the resource potential of wave power around the island, as included in the course notes. Include in your answer the main assumptions of the approach, its limitations and suggestions for improving its accuracy. [

a) You have recently graduated and been employed as an assistant site engineer on an open-cut mine. Your supervisor asks you to assist with modernising some mine operations. In particular, you are asked to investigate how modern surveying and spatial science technologies might be used to improve management of the mine.

Describe four applications of modern surveying technologies that might improve mine management. For each of these: describe the application, identify and describe the surveying and spatial sciences technology that could be used, and explain their likely advantages and disadvantages.

b) You are working with a large mining company. On site there are a number of stockpiles. Some measure approximately 30 x 30 metres and are approximately 5 metres high; several others are larger, measuring approximately 80 x 30 metres and are over 10 metres high.

Your company needs to measure the volume of the stockpiles at the end of each month. You have been asked to investigate options for measuring the stockpiles.

List and describe the surveying technologies that could be applied to this problem. For each option, indicate how it would be used, and list its likely advantages and disadvantages.

WRITE COMPLETE SOLUTION

9. Suppose Paramecium caudatum cultured in a batch reactor obeys the logistic function

X(t) =20,000/3.0 + 50e^−0.01t   ; {t ϵ + ℝ}

Where:
          X(t) = organism count
           t      = time, hours

a. Determine the carrying capacity of the population.
b. Determine the time when the maximum growth rate is expected.
c. Determine the organism count added between the quarter of the maximum growth rate to
three-quarters of the maximum growth rate.

Q.1) Based on your understanding of Aggregate tests answer the following:

a. Show the differences between apparent specific gravity and effective specific gravity by drawing sketches for their aggregate particles.

b. Absorption and specific gravity are critical information for the Hot Mix Asphalt design engineer, Why?

c. How you can make check that the fine aggregate sample reaches the SSD case?


Q.2) Based on your understanding of Asphalt cement tests answer the following:

a. Asphalt binder at room temperature is solid. To be able to mix it with aggregate it must become liquid. How you can convert it to a liquid material (show all methods)?

b. Is there a direct measure for asphalt binder aging? Mention it or them and Explain your answer.

c. In solubility test AC should be moisture free, why?

the key objective of risk management is to increase the probability of a project achieving its goals and objectives. discuss how the nature of competitive tendering influences effective risk management in construction? your answer should include at least 2 suggestions of what clients can do to improve the outcomes of the competitive tendering process?

What is a clinker, which process should be applied to the clinker after production in order to obtain cement? Explain the reasons of that process

A trapezoidal channel carrying 280 cfs has a bottom width of 12 ft, side slope of 2 and a longitudinal bottom slope of 0.001. The critical depth is 2.25 ft and the normal depth is 2.78. The flow depth at the downstream end of this channel is 3.12 ft. Determine which of the statements below is correct.

Select one:

a.

The flow depth decreases in the flow direction.

b.

None of the above.

c.

A flow depth of 2.55 ft will not occur in this channel.

d.

If the channel is very long, a hydraulic jump will occur.

Explain how the 4 main components of cement (C3S, C2S, C3A and C4AF) each participate in the hydration process and contribute to the properties of hydrated cement/concrete.

A retaining wall x m high was designed to stabilize a horizontal ground surface. The back

of the wall is inclined 15 o to vertical direction and can be assumed rough with interface frictionangleofxo.Thesoilparametersareφ' =33o ,γ =18kN/m3,γ =20kN/m3.

Assume no seepage effects.

1. (a) Draw a diagram to show the given wall dimensions, relevant inclinations and the direction of the active force on the wall.

2. (b) Calculate lateral force on the wall assuming the ground water table is at the base of the wall.

3. (c) After a flood, the ground water table rises 0.5m above the wall top surface. Calculate the lateral force on the wall after the flood.

4. (d) If the weight of the wall is (500+ x) kN/m, is the wall safe against sliding after flooding event? Please show your calculations. . the value of x is 28

1. Bearing capacity of strip foundation is independent of water table location (True/False)

2. Density of sand significantly affects the bearing capacity factor Nq (True/False)

3. The bearing capacity of square footing (Length x Width = 39 x 39 m) is higher than strip footing (Width 39 m) under similar conditions (True/False)

4. Bending moment of 39 kNm increases the ultimate bearing capacity of strip footing having a width of 39 m (True/False)

5. Shape factors for square footing with inclined loading should always be set to 1.0 (True/False)