Exam 1 - Prob 1 Prob 2 Prob 3 Prob 4 Total 20 30 25 25 100...

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Texas A&M University College of Engineering Mechanical Engineering Department MEEN 260 Mechanical Measurements Fall 2010 Exam #1 October 20, 2010 Name: Section: Prob 1 Prob 2 Prob 3 Prob 4 Total 20 30 25 25 100 Important! Please read these carefully before proceeding. The exam is closed book and closed notes with the exception of 1 sheet of an 8 1/2 x 11 notes. A number of formulas and tables that may be needed are provided at the end of the exam. Read the problem statements carefully and present your work in as clear a manner as pos- sibl e, with appropriate diagrams clearly drawn and each assumption, partial answer, or final answer clearly marked. Partial credit will only be given if the solution is logically consistent and readable. Part of the points given are for sensible interpretation of the problem statement. Please do not ask the instructor/proctor to interpret the problem for you. Likewise, if a formula or a defini- tion is not given it means you are expected to know it based on your prior knowledge of engineering sciences . (The case in point would be the definition of stiffness of a spring and how it relates to force and displacement, Fourier’s Law of heat conduction or the first law of thermodynamics and so forth.) Please be sure to sign the Aggie Honor Code statement before submitting your work. Good Luck!!! “On my honor, as an Aggie, I have neither given nor received unauthorized aid on this academic work.” Signature
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Name: Section: Problem 1: (20 Points.) For each of the questions given below circle the best answer. 1. In a LVDT(shown below) the sensing element is a. the core. b. the primary and secondary coils. c. the combination of the core and the secondary coils. d. none of the above. 2. Assuming that measurements in a given experiment follow the normal probability distribu- tion, approximately what percentage of the measurements fall within standard deviations of the mean? a. 95% b. 99% c. 67% d. 98% 3. A strain gauge can be used to measure a. mechanical strain. b. mechanical stress. c. force/load. d. all of the above 4. Given a set of probable events, in a uniform distribution, every event has a. zero probability of occurrence. 2 ±
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Name: Section: b. 100% probability of occurrence. c. 50% probability of occurrence. d. the same probability of occurrence as any other event in the given set. Problem 2: (30 Points.) In an experiment conducted to measure the modulus of elasticity of a type of alloy the following data are obtained: Note that the circular rod used as the test article is under tension and its cross sectional area is 2.5 square inches and its length is 10 inches.
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This note was uploaded on 01/03/2011 for the course MEEN 260 taught by Professor Langari during the Fall '08 term at Texas A&M.

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Exam 1 - Prob 1 Prob 2 Prob 3 Prob 4 Total 20 30 25 25 100...

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