Mechanical Engineering : Engineering Materials QUESTIONS AND ANSWERS :: part3 : 21 to 25
Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
21.Pick up the wrong statement Nickel and chromium in steel help in |
| providing corrosion resistance |
| improving machining properties |
| providing high strength at elevated temperatures |
| raising the elastic limit |
| improving the resilience and ductility. |
22.Hardness of steel depends on |
| amount of carbon it contains |
| the shape and distribution of the car-bides in iron |
| method of fabrication |
| contents of alloying elements |
| the quality of ore from which it is made. |
23.Depth of hardness of steel is increased by addition of |
| nickel |
| chromium |
| tungsten |
| vanadium |
| ell of the above. |
24.Railway rails are normally made of |
| mild steel |
| alloy steel |
| high carbon |
| tungsten steel |
| cast iron steel. |
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