4. The composition of the Earth’s atmosphere has changed in the past 200 years. What are/were the major changes in our atmospheric composition?

A national laboratory has stated that they are responsible for a ceramic machining program that intends “to provide measurement methods, data, and mechanistic information needed by industry to develop innovative cost-effective methods for machining advanced structural ceramics.” Grinding with diamond wheels is the most prevalent method of machining advanced ceramics. This machining is highly complex and depends on many interdependent factors. The major elements of a grinding system are the grinding wheel, the grinding fluid, the machine tool, and the workpiece. Each of these is associated with several parameters that can influence the grinding process: such as, the type and size of the diamond grit, the properties of the grinding fluid, method of delivery of the grinding fluid, and grinder characteristics (e.g., stiffness and vibration).

A specific experiment is proposed to characterize the effects of grinding parameters on the flexural strength of ceramic “A.” The investigators are particularly interested in the effects of grinding speed, wheel diamond grit size, and “down feed rate” on the ceramic strength.

1. What is the goal of the lab with respect to machining ceramics and state an objective for the specific experiment
2. Give an experimental plan. Which factors are varied and the number of levels. How you might determine the values for the levels for each factor? What are the advantages and disadvantages of this plan?
3. Three other variables not described anywhere in this problem description that may not be simple to control? For each variable, what might be done to avoid confounding the experiment due to these variables?
4. The need for replications that is specific to this type of experiment?

9. The CAA dealt with both stratospheric and tropospheric ozone issues. Explain which sections addresses which issue and how these two issues are addressed. (SHORT ESSAY)

7. Identify two factors that affect the lifetime of pollutants in the atmosphere, and explain how these two factors affect pollutant lifetime. (SHORT ESSAY)

5. Name the top five air pollutants we presently regulate. Is there a common source for these top five air pollutants? If so, what is it? What percentage of our atmospheric gases do these top five regulated gases make up? (SHORT ESSAY)

1.) A company is producing a product that has the following data:

volume of sales per year = 3

00,000 units

selling price per unit = $10

0

variable cost = $6

0 per unit

fixed costs per year = $6

00,000

book depreciation = $4

00,000

tax depreciation = $50

0,000

debt interest = $1

00,000

tax rate = 40%

With the above data determine

(a) Before

-

tax profit

(b) After

-

tax profit

(c) Break

-

even yea

rly volume of sales

(d) Break

-

even selling price

(e) Plot the break

-

even chart

Talk about Water Supply System and how it works in our houses within 2 pages long or more (typed). You may provide pictures.

What are the main reasons for Design Build not being legal in some states?

What is the main reason for CM at Risk not being legal in some states?

What is the difference between CM (Agency sometimes called for fee) and CM-at-risk? If you were an owner, whose advice would you consider to be more objective?

Q. Discuss about lighting and ventilation requirement in public buildings.

(Answer must be in-detail and as per National building code, if possible please provide the reference from where the answer has been written)

discussion questions

What are the unintended social impacts of our airport planning and engineering work?

What are the unintended impacts of our engineering decisions and how can they be considered during planning and design stages?

How has the Department of Homeland Security changed from 2003 to the present with regard to the war on drugs?

ENMA 480-ETHICS QUESTIONS
1.   What is your definition of “ethics”? Are there differences in engineering ethics versus other kinds of ethics, such as business ethics or medical ethics?
2.   What recent or historical engineering case studies do you find most interesting?
3.   Describe a moral or ethical issue that is most conflicting to you and explain your indecisiveness about it.
4.   Do humans have free will or is our fate predetermined? Explain. You may choose to provide your definition of free will in your response.

What does the results of the Compression Test determine? Provide rational for your answer.

he pressure of water at a depth of 10 km in the ocean is measured to be 100 MN/m2. The specific weight of the sea water at the surface is 10.2 kN/m3 while the average bulk modulus is 2.4 x 106 kN/m2. Calculate a) Change in specific volume (dV) between the volume at surface and at the 10 km depth. [4] b) The specific volume [3] c) Specific weight of the sea water at 10 km