Mechanical Engineering : Engineering Materials QUESTIONS AND ANSWERS :: part2 : 11 to 15
Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
11.For the allotropic forms of iron, the points of arrest are |
| the points where no further change occurs |
| constant for all metals |
| the points where there is no further flow of metal |
| the points of discontinuity |
| the points where major changes take place. |
12.The metallic structure of mild steel is |
| body centred cubic |
| face centred cubic |
| hexagonal close packed |
| cubic structure |
| orthorhombic crystal. |
13.Cast iron has |
| high tensile strength |
| its elastic limit close to the ultimate breaking strength |
| high ductility |
| all of the above |
| none of the above. |
14.An important property of high silicon (12 - 18%) cast iron is the high |
| tenacity |
| brittleness |
| plasticity |
| corrosion resistance |
| hardness. |
15.The crystal of alpha iron is |
| body centred cubic |
| face centred cubic |
| hexagonal close packed |
| cubic structure |
| orthorhombic crystal. |
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