Practice test 1

# Practice test 1 - EMA 3010 Practice test study guide No 1...

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EMA 3010 Practice test/ study guide No. 1 May, 2010 Students- This is a practice test and study guide for the first exam on Thursday. These questions represent the types of questions, and the relative proportions of the different types of questions you will have on the test. If you can do this well, you should do well on the test! I will supply an equation and data sheet on the test (before the test day) and I have shown here the types of questions/equations that you will see, so be able to know which equations to use for which type of problem. There will be a large number of short answer questions, though not as many as here, so be able to answer fairly quickly in order to finish. There will be problems to solve as well, as I have listed here. You can use the whole class time from 12:30-3:00pm for the test. The test covers chapters 1-6 and up through page 202 (yield strength) in Ch.7.Good luck! Chapter 1 1. List six general types of properties that are often considered in selecting or designing materials:___mechanical __, _____electrical____, _______thermal______, ____magnetic________,________optical_______, _____deteriorative______. 2. What group of four interrelated attributes or factors about materials makes up the “materials tetrahedron”? __processing__,_____structure___, ______properties____, and _____performance________. 3. (a) List the three general classes of engineering materials we study, with different characteristic properties? ___metals___,__ceramics____,______polymers_____ (b) Name a fourth class of materials that are made composed of mixtures of different pairs of the above three, with properties intermediate among them. ____composites____ 4. Rank the above primary groups of materials from highest to lowest in the different property areas. (These rankings are the general behaviors, since there are always exceptions): 1

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Strength Density Melting temperature Highest _metals__ metals_ _ceramics__ Intermediate _ceramics_ _ceramics ___metals__ Lowest polymers_ polymers_ ___polymers____ Chapter 2 1. The three most common crystal structures found in metal are (you can abbreviate): __fcc___,_____bcc____, ___hcp_____ 2. Rank these structures from most closely packed to least packed: _____hcp___,____fcc_______, _______bcc___ 3. List the two most important factors that determine ceramic crystal structure: _magnitude of electrical charge on each of the component ions_and ____relative sized of the cations and anions____ 4. Name the three types of primary atomic bonds: ___ionic____, _______covalent__, __metallic__ 5. On the periodic table, elements of metallic materials tend to be in which areas (left,). Non-metals are located in the (right). 6. What type(s) of bonding is most characteristic of the different material classes: metals_metallic____, ceramics______ionic___, polymers______covalent______ 7. Which of the two energy wells, (a) or (b), represents a material with 2
Highest atomic bond strength ________ Closest atomic spacing ________ Lowest elastic modulus

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## This note was uploaded on 09/05/2011 for the course EMA 3010 taught by Professor Unknown during the Summer '08 term at University of Florida.

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Practice test 1 - EMA 3010 Practice test study guide No 1...

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