Engineering 1310 Final Exam December 12, 2008

Engineering 1310 Final Exam December 12, 2008

Name: ______

Exam Guidelines

1.SHOW YOUR WORK. NO CREDIT WILL BE GIVEN FOR JUST AN ANSWER ON A QUESTION THAT REQUIRES A NUMERICAL OR COMPUTED SOLUTION.

Even if you are uncertain about a question, write down an answer since partial credit will be given.

2.If you don’t have enough room to complete a question, continue on the back of the exam. Note in the workspace provided with the question that your work continues onto another page

3.Remember to include units with all problems that require a numerical answer.

4.Clearly indicate your answer by drawing a box around it or underlining it.

5.You have until 4:00 to complete the exam. When time is called, stop writing.

Some Formulas, Constants:

1.For the truss shown below, calculate the forces acting in members 1, 2, 3, and 4. Be sure to sketch your free body diagrams used in your calculations and set up the equations. Don’t stress if you don’t have enough time to solve for the unknowns and get the actual numerical answers. This will be a minor part of the credit. The free body diagrams with the forces acting in the right directions and the equations for these is the most important part of this problem.

2.Fully explain how you constructed your bridge and what considerations made regarding design. Give a complete explanation of the use you made of Model Smart to determine your design. What material changes would you make to your bridge given the results of the “crushing test?” Please, provide a rough sketch of your design and indicate any changes you might make to the design.

Introduction to Engineering:

3.Scientists seek ______.

Engineers apply ______in order to ______.

The Engineering Method:

4.In the chapter that we read from the book, Discussion of the Method: Conducting the Engineer’s Approach to Problem Solving, by Billy Vaughn Koen, the author listed 4 key elements (or words) that appear in his definition of engineering problems. List 2 of these 4 key words.

a.______

b.______

TeamBuilding:

5.Which of following is NOT a benefit of working in teams?

a.It takes less time.

b.Grades and information retention increase.

c.Communication skills are enhanced.

d.Your resume can reflect training in soft skills for the professional environment.

Creative Problem Solving:

6.In the Thinking Aloud Pairs Problem Solving (TAPPS) exercise, two students worked in a team. Each had a specific role to play in the exercise. What were the two roles?

a.______

b.______

Plagiarism:

Read through the following passage.

Original Source Material:

In modern times, many resources are used once and then thrown away. This “one-pass” approach is increasingly unacceptable, because of the finite nature of our resources and because discarded resources cause pollution. Instead, engineers must develop a cyclical approach in which resources are reused. Some products are now designed to be dismantled when their useful life is completed. They are constructed of metals and polymers that can be reformed into new products.

(Quoted directly from p. 5 of: Holtzapple, Mark T. and Reece, W. Dan. Foundations of Engineering, 2nd ed. McGraw-Hill Higher Education, Boston (2003).)

7.Read the following passage and answer the question about the passage. There may be more than one correct answer.

Passage #1:

According to Holtzapple and Reece, engineers must develop a cyclical approach in which resources are reused.

Bibliography:

1. Holtzapple, Mark T. and Reece, W. Dan. Foundations of Engineering, 2nd ed. McGraw-Hill Higher Education, Boston (2003).

The passage above is:

a.Plagiarized because it was directly quoted from the source material without quotation marks around it.

b.Plagiarized because there is no citation of the source material.

c.Plagiarized because the authors’ words are paraphrased without any citation for the source of the material.

d.Acceptable.

8.Read the following passage and answer the question about the passage. There may be more than one correct answer.

Passage #2:

According to Holtzapple and Reece, engineers who are responsible “must develop a cyclical approach in which resources are reused.[1]”

Bibliography:

1. Holtzapple, Mark T. and Reece, W. Dan. Foundations of Engineering, 2nd ed. McGraw-Hill Higher Education, Boston (2003).

The passage above is:

a.Plagiarized because it was directly quoted from the source material without quotation marks around it.

b.Plagiarized because there is no citation of the source material.

c.Plagiarized because the authors’ words are paraphrased without any citation for the source of the material.

d.Acceptable.

Ohm’s Law & Power Law:

9.For the figure shown:

a.Draw a schematic for this circuit.

b.Calculate the current flowing in the flashlight when the switch is engaged.

c.Calculate the power delivered to the bulb.

10.The power dissipation of a 47,000 Ω resistor is stated by the manufacturer to be 0.25 W.

a.What is the maximum voltage that may be applied to this resistor?

b.What is the maximum current that can flow through the resistor without damaging it?

Resistors in Series or Parallel:

11.For the given circuit (R1 = 2.7kΩ, R2 = 2.7kΩ, R3 = 3.3 kΩ):

a.Calculate the equivalent resistance, REQ, for this circuit.

b.Calculate the current flowing through the battery.

c.Calculate the current flowing through R1 and through R2.

d.Calculate the voltage at point A.

Capacitors:

12.A 100 μF capacitor is charged with 5V.

a.How much charge is stored?

b.How many electrons are stored on the negative plate?

Inductors and Power:

13.A 50,000-V high-voltage line supplies an industrial park. The industrial park requires 1000 A at 440 V. A transformer is used to reduce the voltage.

a.How much power does the industrial park require?

b.In a 24-hour day, how much energy, in Joules, is used by the industrial park?

c.How much current must be drawn from the high-voltage line?

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