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. |
More Engineering Materials QUESTIONS AND ANSWERS available in next pages
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