5) The main effect of rapid cooling is: a) Internal stresses b) Brittleness e) Dimensional instability d) All above 6) In general, all alloying elements increase the hardenability of steel except: a) Silicon and Cobalt b) Cobalt and Aluminium c) Silicon and Aluminium d) Boron and Silicon 7) Gray cast iron is annealed in order to improve: a) Machinability b) Wear resistance c) Strength d) Non of these 8) The basic step in any heat treatment process is the formation of a) Ferrite b) Pearlite c) Austenite d) Martensite 9) Which of the following elements has the maximum effect on the hardness of steel? a) Cr b) Mo c) W d) Ma 10) The microstructure of martempered steel is: a) Fine pearlite b) Martensite c) Bainite d) Martensite-Retained Austenite

5) The main effect of rapid cooling is: a) Internal stresses b) Brittleness e) Dimensional instability d) All above 6) In general, all alloying elements increase the hardenability of steel except: a) Silicon and Cobalt b) Cobalt and Aluminium c) Silicon and Aluminium d) Boron and Silicon 7) Gray cast iron is annealed in order to improve: a) Machinability b) Wear resistance c) Strength d) Non of these 8) The basic step in any heat treatment process is the formation of a) Ferrite b) Pearlite c) Austenite d) Martensite 9) Which of the following elements has the maximum effect on the hardness of steel? a) Cr b) Mo c) W d) Ma 10) The microstructure of martempered steel is: a) Fine pearlite b) Martensite c) Bainite d) Martensite-Retained Austenite

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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