SE 312 EXAM QUESTIONS ANSWERED CORRECTLY LATEST UPDATE 2026

SE 312 EXAM QUESTIONS ANSWERED CORRECTLY LATEST UPDATE 2026 Elastic Modulus Can only be found for materials with linear relationships - Answers False Elastic Modulus Can be approximated for some materials using the 0.2% yield strength method - Answers False; secant modulus is used Elastic Modulus Relates Stress to strain by Hooke's law - Answers True (for linear materials) Tension Yielding Is a type of failure - Answers True Tension Yielding Is found using the secant modulus - Answers False (not related) Tension Yielding Is the lower yield point fro materials with an upper and lower yield point - Answers True (upper is unstable) What is the difference between Engineering Stress vs True Stress - Answers Engineering Stress- is computed using the initial cross section area True Stress- is computed using the instantaneous cross sectional area Tension Elastic Region No Permanent deformation - Answers True Tension Elastic Region Always obeys Hooke's Law - Answers False (PMMA, Cast Iron) Tension Elastic Region Materials that fail catastrophically are known to be brittle - Answers True Tension Elastic Region Uniform stress state - Answers True Tension Plastic Region Permanent Deformation - Answers True Tension Plastic Region Young modulus relates stress to strain in this region - Answers False (Elastic Region) Tension Plastic Region Breaks in this region are 90 degrees to principle direction of stress - Answers False Tension Plastic Region Uniform stress state throughout entire region - Answers False ( non uniform after necking, uniform prior) Tension Brittle Failures Characterized by large changes in cross sectional area - Answers False Tension Brittle Failures Are associated with cup- cone failures - Answers False Tension Ductile Failures Fail at 45 degrees to principle direction of stress - Answers True Tension Ductile Failures Are associated with non uniform deformation of the specimen - Answers True Tension Ductile Failures Begin with triaxial states of stress - Answers True Tension Ductile Failures True stress is valid for the entire curve - Answers False (assume uniform deformation) Characteristics of Aluminum Upper and Lower Yield - Answers False Characteristics of Aluminum Ductile Behavior - Answers True? Characteristics of Aluminum Orange peel effect on deformed surfaces - Answers True Characteristics of 1045 Steel Mill scale on specimen - Answers True Characteristics of 1045 Steel Ductile behavior in tension - Answers True Characteristics of 1045 Steel Upper and lower yield points - Answers True for Normalized, False for Cold Rolled Characteristics of Cast Iron Similar behavior in tension and compression - Answers False Characteristics of Cast Iron Heterogeneous - Answers True Characteristics of Cast Iron Has a linear elastic region in tension - Answers False (Secant modulus) Rockwell Hardness Scale B is for hard materials, Scale C is for soft materials - Answers False (reversed) Rockwell Hardness Require correction if performed on curved surfaces - Answers True (curvature correction in labs) Rockwell Hardness Number bases upon diameter of indentation - Answers False (Dept of indentation) Brinell Hardness Useful only for homogenous materials - Answers False Brinell Hardness Useful for both soft and hard metals - Answers True (Aluminum to steel) Brinell Hardness Largest of the indenters - Answers True (10 mm diameters indenter) Four Point Bending Test