Mechanical Engineering : Engineering Materials QUESTIONS AND ANSWERS :: part5 : 6 to 10
Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
6.Large forgings, crank shafts, axles normally contain carbon upto |
| 0.05 to 0.20% |
| 0.20 to 0.45% |
| 0.45 to 0.55% |
| 0.55 to 1.0% |
| 1.0 to 1.2%. |
7.Cold rolled steel sheets contain carbon of the following order |
| 0.1% |
| 0.2% |
| 0.4% |
| 0.6% |
| 0.8%. |
8.High carbon steel carries carbon %age c |
| 0.1 to 0.3% |
| 0.3 to 0.6% |
| 0.6 to 0.8% |
| 0.8 to 1.5% |
| 1.5 to 2.5%. |
9.Nickel in steel |
| improves wear resistance, cutting ability and toughness |
| refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties |
| improves cutting ability and reduces hardenability |
| gives ductility, toughness, tensile strength and anticorrosion properties |
| none of the above. |
10.The presence of sulphur in pig iron makes |
| it easily machinable |
| it brittle |
| it hard |
| the casting unsound |
| increases the fluidity. |
More Engineering Materials QUESTIONS AND ANSWERS available in next pages
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