quiz5s202 - a. 4.3% carbon b. 2% carbon c. 0.8% carbon (c )...

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Home Introduction Policies Resources Requirements & Grading Syllabus Assignments Handouts Discussion Web Links Distance Learners Contact MSE 200 Quiz 5
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1. White cast irons are brittle because of a. ionic bonding b. casting defects c. cementite is brittle (c ) 2. With increasing carbon percentage, the TTT diagrams shift to the a. right b. left c. neither side ( a) 3. Most plain carbon steels contain carbon no more than a. 4.3% b. 2% c. 1.4% ( c) 4. Nodular or ductile iron is made by a. deformation of white cast iron b. addition of 2 to 3 % Si to white cast iron c. addition of 2-3%Si and innoculants of magnesium and cerium (c ) 5. Silicon is added to cast irons to a. dissociate Fe3C b. form SiC c. form nodules of graphite (a ) 6. Eutectoid transformation in iron-carbon diagram is at
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Unformatted text preview: a. 4.3% carbon b. 2% carbon c. 0.8% carbon (c ) 7. Solubility of carbon in austenite compared to that in ferrite is a. high b. low c. same (a ) 8. Hypereutectoid steels are never heated to austenitic temperatures because a. brittle cementite network forms upon cooling b. grain size becomes smaller c. energy costs are high ( a) 9. Rolling of steels to get large deformation is performed a. below A123 line b. in the austenitic range c. at room temperature ( b) 10. Most structural steels contain a carbon percentage below a. 0.8% carbon b. 1% carbon c. 4.3% carbon (a ) Bonus question: 1. Should the MSE 200 lab be retained- give reasons...
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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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quiz5s202 - a. 4.3% carbon b. 2% carbon c. 0.8% carbon (c )...

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