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Unformatted text preview: c. above A3 temperature (a ) 7. Cast irons are always close to carbon weight percentage of a. 0.76 b. 4.3 c. 0.4 (b ) 8. Martempering is a heat treatment with a. double quenching followed by tempering b. quenching followed by tempering c. cooling to above Ms and keeping at that temperature for long time (a ) 9. A high alloy steel when taken from the furnace and kept in air will give a. martensite through out b. martensite outside and pearlite inside c. pearlite through out (a ) 10. Quenching cracks are as a result of a. stress from martensite b. brittle martensite c. differences in the temperature of outside and inside regions (c ) 11. Structural steels are made from a. hypoeutectoid steel b. pearlitic steel c. hypereutectoid steel (a )...
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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.
- Spring '08