A contractor must choose between buying or renting a crane for the duration of a 5 year construction project. The contractor uses an MARR of 8%. At the end of the project, the crane can be sold for 26% of its initial cost. The cost to operate and maintain the crane is $210,000 per year. Renting the crane costs $330,000 per year including all operating and maintenance costs. Determine the maximum amount the contractor should pay to purchase the crane (i.e. the breakeven initial cost of the crane). Express your answer in $ to the nearest $1,000

The settlement of a structure has the normally distributed probability density function with a mean of 26mm and a coefficient of a variation of 20%.

1) What is the probability that the settlement is less than 22mm?

2) What is the probability that the settlement is between 24mm and 29mm?

3) What is the probability that the settlement exceeds 31mm?

flow chart and description for water and wastewater treatment facility.

Imagine that you are a traveler from Mongol-ruled China who has traveled to Western Europe in the 1200s. Describe the customs and lifeways of medieval Europe in a way that would be familiar to a reader from medieval China.

Remember that your answer needs to be at least two paragraphs long. When you reply to a fellow student, write as though you are a medieval Central Asian Turk or Chinese person trying to understand the lifeways and customs of the medieval Europeans.

A simply supported beam spans 35ft and carries a simply distrusted dead load of 0.2kip/ft including the beam self-weight and live load of 0.8kip/ft. Determine the minimum required plastic section modulus and select the lightest-weight W-shape to carry the moment. Assume full lateral support and A992 steel. Design by (a) LRFD and (b) ASD

a) Describe briefly how the coefficient of consolidation (Cv) value can also be estimated based on a fullscale loading trial. Explain why it is more reliable to use the Cv value obtained from a field trial than from a lab test.

b) Based on a quick search on the internet, briefly describe the principles of a piezometer and suggest how it can be used in the field to measure and monitor groundwater pressure.

c) Suggest briefly two practical uses of the continuous monitoring of pore water pressure using piezometers following the completion of filling.

What is the purpose of adding carbon dioxide gas (CO 2 ) in treating water for public supply?
Give pertinent chemical reaction equations.

Could you please give a specific example of how life cycle assessment is used for drought?

the methods Sustainable unfired bricks manufacturing from construction and demolition wastes

Discuss why embodied energy is considered one of the most important concepts related to materials?

Do you agree that access to daylight and views can enhance efficiency of building occupants? You can support your argument with an example.

1-One of the 12 Principles of Green Engineering* is Multi-component products should strive for material unification to promote disassembly and value retention (minimize material diversity). Give a specific example of how this principle can be used to prevent pollution.

2-One of the 12 Principles of Green Engineering* is Design of processes and systems must include integration of inter connectivity with available energy and materials flows. Give a specific example of how this principle can be used to prevent pollution.

3-One of the 12 Principles of Green Engineering* is Separation and purification processes should be a component of the design framework. Give a specific example of how this principle can be used to prevent pollution.

4-One of the 12 Principles of Green Engineering* is System components should be output pulled rather than input pushed through the use of energy and materials. Give a specific example of how this principle can be used to prevent pollution

a specific example of how this principle can be used to prevent pollution.

5-One of the 12 Principles of Green Engineering* is It is better to prevent waste than to treat or clean up waste after it is formed Give a specific example of how this

principle can be used to prevent pollution.

6-One of the 12 Principles of Green Engineering* is Design for unnecessary capacity or capability should be considered a design flaw. This includes engineering "one size fits all" solutions. Give a spepific example of how this principle can be used to prevent pollution.

7-One of the 12 Principles of Green Engineering* is Performance metrics should include designing for performance in commercial "afterlife". Give a specific example of how this principle can be used to prevent pollution.

8-One of the 12 Principles of Green Engineering is '"'Designers need to strive to ensure that all material and energy inputs and outputs are as inherently non-hazardous as possible." Explain how this relates to the concept of Industrial Ecology.

Fluid mechanics.
Hydrodynamics.
There are people who say that to get wet the least when it's raining and one does not have an umbrella is better to run, and others say it's better to go slowly. Suppose it rains vertically with a flow of 10^-5 m^3/s per square meter, and that you have to walk 100 m in the rain. The drops have an average size of 1 mm^3. Modeling an adult person as a box 2m high, 1m wide and 0.5m deep, determine if in this situation it is better to walk at 1m/s or run at 4m/s. Do we have to take into account other circumstances or physical phenomena?
Explain in detail your procedure and reasoning to solve this problem.

Select the lightest W section to serve as an axially loaded column 28 ft long, in a braced frame, with additional lateral support in the weak direction at mid-height. The load to be carried is 65 kips dead load and 150 kips live load. Assume the top and bottom of the column are hinged.

a) Use A992 and indicate first and second choices

b) Use A572 Grade 60, indicating first and second choices

Discuss the various methods for determining a line on a Cartesian Coordinated Plane and graphing that line. 

A strip wall footing 1.5 m wide is located 1.1 m below the ground surface.
Supporting soil has a unit weight of 19.60 kN/m3 . The results of laboratory
tests on the soil samples indicated that the supporting soil has the following
properties: c’ = 57.5 kN/m2
and I’ = 25°Groundwater surface was not
encountered during the subsurface exploration. Determine the allowable
bearing capacity of the soil using a factor of safety of 2.5.