q4s03 - lower temperature is a. lower b. higher c. same 8....

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Home Introduction Policies Resources Requirements & Grading Syllabus Assignments Handouts Discussion Web Links Distance Learners Contact MSE 200 Quiz 4 Spring 03 1. A structural material is to be used under arctic cold conditions. The
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material that you will choose is a. fcc b. bcc c. hcp 2. Activation energy for steady state creep is same as that for a. viscous flow b. self diffusion c. grain boundary diffusion 3. Turbine blades subjected to high temperature and stress are made with a. high hardness b. high creep rupture life c. fracture strength 4. Dislocation climb is motion of the dislocation a. in the glide plane b. normal to the glide plane c. at low temperature 5. Fatigue strength is defined for a. ferrous alloys b. nonferrous alloys c. for all materials 6. Fatigue life of samples is higher for samples in a. vacuum b. oxygen c. moisture 7. Viscosity of a material at higher temperature compared to that at
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Unformatted text preview: lower temperature is a. lower b. higher c. same 8. To improve fatigue life of a component, a. residual tensile stress on the surface is beneficial b. residual compressive stress on the surface is beneficial c. no residual stress should be present 9. Fracture toughness in plane strain region is a. a constant for a given microstructure b. increases with crack size c. increases with applied stress 10. Stress relaxation in polymeric materials is a result of a. elastic deformation b. viscous deformation c. plastic deformation 11. Fatigue failure of components in service takes place when the sample is subjected to a. stress above the yield point b. stress closed to the UTS c. stress below the yield point 1. (a ) 2. ( b) 3. (b ) 4. (b ) 5. (b ) 6. (a ) 7. (a ) 8. ( b) 9. ( a) 10. (b ) 11. (c )...
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This note was uploaded on 10/11/2009 for the course MSE 200 taught by Professor Wholedepartment during the Spring '08 term at N.C. State.

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q4s03 - lower temperature is a. lower b. higher c. same 8....

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