Mechanical Engineering : Engineering Materials QUESTIONS AND ANSWERS :: part5 : 16 to 20
Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
16.The machinability of steel is increased by |
| silicon and sulphur |
| phosphorous, lead and sulphur |
| sulphur, graphite and aluminium |
| phosphorous and aluminium |
| none of the above. |
17.The percentage of carbon in low carbon steel is |
| 0.05% |
| 0.15% |
| 0.3% |
| 0.5% |
| 0.7%. |
18.Which of the following elements does not impart hardness to steel |
| copper |
| chromium |
| nickel |
| silicon |
| none of the above. |
19.Which of the following is not the correct method of increasing fatigue limit |
| shot peening |
| nitriding of surface |
| cold working |
| surface decarburisation |
| under-stressing. |
20.Connecting rod is usually made of |
| aluminium |
| low carbon steel |
| medium carbon steel |
| high carbon steel |
| cast iron. |
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