test 1 study guide

# Test 1 study guide - Test#1 Study guide What is measurement Measurement is a procedure in which an unknown quantity is compared to a known standard

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Test #1 Study guide What is measurement? Measurement is a procedure in which an unknown quantity is compared to a known standard, using a consistent and accepted system of units. What is accuracy and how does it differ from precision? Accuracy is the degree to which a measured value differs from the true value, while precision is just the repeatability between measurements. What do the terms “resolution” and “stability” mean as applied to measuring instruments? Resolution is the smallest variation of the quantity of interest that can be detected by the instrument. Stability is the capability to retain its calibration; i.e., the capability to measure a quantity without deviation from the standard How would the “limit” (go/no go) gage at right be used to accept or reject the cylindrical part? If the part passes the “GO” button, but does not pass the “No-Go” button, the feature is acceptable. If the part fails to pass the “GO” button (too large), or if it passes the “NO- GO” button (too small), it is rejected. Statistical sampling procedures are used to reduce the cost of inspection. What is the risk associated with sampling? There is a predictable risk that bad parts will be accepted because they were not included in the sample. Sketch the typical Engineering Stress-Strain diagram for a metal. Show the Yield and Tensile Strengths and the elastic and plastic regions. See Figure 3.3 in text. How is strain, or work, hardening evident on the true stress-strain diagram? Strain hardening is indicated by the increase in stress as plastic strain increases. What is the effect of temperature on ductility? Ductility increases with increase in temperature. Why is this behavior important in metal forming? It means that material can be deformed more, and more easily, when hot than when cold.

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When true stress and strain are plotted on natural log-log coordinates, how is the strain hardening exponent evident? By the slope of the straight line that results
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## This note was uploaded on 10/22/2010 for the course ECON 201 taught by Professor Baker during the Spring '07 term at University of Tennessee.

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Test 1 study guide - Test#1 Study guide What is measurement Measurement is a procedure in which an unknown quantity is compared to a known standard

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