During three point l During three point loading test the maximum tensile

During three point l during three point loading test

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5. During three point l During three point loading test, the maximum tensile strength occurs at Student Response Value Correct Answer Feedback A. the point of maximum deflection and the outer most concave layer B. the point of maximum deflection and the outer most convex layer 100% C. the point of maximum deflection and the central layer Score: 1/1 6. Critical resolved sh Critical resolved sheer stress is a material property and is Student Response Value Correct Answer Feedback A. twice the magnitude of the
yield strength B. twice the magnitude of the tensile strength C. one half the magnitude of the yield strength 100% D. one half the magnitude of the tensile strength Score: 1/1 7. Which of the followi 5 Which of the following statements about composites is NOT correct? Composites: Student Response Value Correct Answer Feedback A. Are very strong and stiff, yet very light in weight B. Have ratios of strength?to?weight and stiffness?to?weight, several times greater than steel 0% C. Are equally strong in all direction D. Have generally better fatigue properties Score: 0/1
8. A better definition A better definition of elastomer is: Student Response Value Correct Answer Feedback A. Materials which melt on heating and solidify on cooling due to the van der Waal forces between adjacent molecules B. Materials with long chained molecules C. Materials which exhibit large deformation under stresses from which they recover when the load is removed 100% D. Materials which can sustain large amounts of plastic deformation Score: 1/1
9. Most imperfections i Most imperfections in solid crystal structure of metals originate: Student Response Value Correct Answer Feedback A. When it is subjected to stress and strain B. During the machining process C. When the material is heated D. When the molten metals solidify 100% Score: 1/1 10. The mer of thermopla The mer of thermoplastic Polystyrene (PS) is similar to polyethylene mer with Student Response Value Correct Answer Feedback A. a chlorine atom replacing a hydrogen atom B. a chlorine atom replacing a hydrogen atom C. a silicate {1 silicon, 4 oxygen}
molecule replacing a hydrogen atom D. a phenyl {6 carbon, 5 hydrogen} molecule replacing a hydrogen atom 100% Score: 1/1 11. In general the molec In general the molecular weight of polymers is in the range Student Response Value Correct Answer Feedback A. 1 -100 g/mol B. 100 -1,000 g/mol C. 10,000 -1,000,000 g/mol 100% D. Over 1,000,000 g/mol Score: 1/1

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