Mechanical Engineering : Engineering Materials QUESTIONS AND ANSWERS :: part2 : 1 to 5
Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
1.Wrought iron is |
| hard |
| high in strength |
| highly resistant to corrosion |
| heat treated to change its properties |
| least resistant to corrosion. |
2.Steel contains |
| 80% or more iron |
| 50% or more iron |
| alloying elements like chromium, tungsten nickel and copper |
| elements like phosphorus, sulfur and silicon in varying quantities |
| high quantities of sulfur. |
3.Cast iron is characterised by minimum of following %age of carbon |
| 0.2% |
| 0.8% |
| 1.3% |
| 2% |
| 6.3%. |
4.An important property of malleable cast iron in comparison to grey cast iron is the high |
| compressive strength |
| ductility |
| carbon content |
| hardness |
| surface finish. |
5.In mottled cast iron, carbon is available in |
| free form |
| combined form |
| nodular form |
| flat form |
| partly in free and partly in combined state. |
More Engineering Materials QUESTIONS AND ANSWERS available in next pages
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