EXAM 2-2009 ANS KEY

EXAM 2-2009 ANS KEY - MSE150.02 EXAM 2 SPR2009 EXAM II...

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MSE150.02 EXAM 2 SPR2009 EXAM II INTRODUCTION TO MATERIALS SCIENCE - MSE 150.02 SPRING 2009 HONOR CODE I PLEDGE MY HONOR THAT I HAVE NEITHER GIVEN OR RECEIVED AID ON THIS EXAMINATION. I FURTHER PLEDGE THAT, IF I HAVE REASON TO SUSPECT THAT THE CODE HAS BEEN VIOLATED, I HAVE TAKEN OR WILL TAKE ACTION AS OUTLINED IN THE CODE. SIGNATURE _________________________________ PRINT NAME ____ASHOK CHOUDHURY_ANSWER KEY_______ FOR PARTIAL CREDIT SHOW DETAILS OF ALL WORK INCLUDING CALCULATIONS, DRAWING OF LINES ETC. -------Ashok Choudhury DO NOT TURN THIS PAGE UNTIL 11:10 AM YOU HAVE 50 MINUTES TO COMPLETE THIS EXAM 1
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MSE150.02 EXAM 2 SPR2009 QUESTIONS 1-10 (1 point each) True or False 1. Metals with a BCC crystal structure exhibit a ductile to brittle fracture transition temperature. TRUE FALSE 2. As the temperature of a material decreases, the modulus of elasticity will decrease. TRUE FALSE 3. Ceramic materials exhibit larger ultimate strength in compression. TRUE FALSE 4. Increasing the yield strength of a metal by cold working will decrease the ductility of the material. TRUE FALSE 5. The mechanical properties of a uniaxial fiber reinforced composite are isotropic. TRUE FALSE 6. The electrical resistivity of an intrinsic semiconductor decreases with increasing temperature. TRUE FALSE 7. The electrical resistivity of a metallic conductor increases with increasing temperature. TRUE
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EXAM 2-2009 ANS KEY - MSE150.02 EXAM 2 SPR2009 EXAM II...

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