Mechanical Engineering : Engineering Materials QUESTIONS AND ANSWERS :: part7 : 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.Delta metal is an alloy of |
| copper, zinc and iron |
| iron, nickel and copper |
| iron, lead and tin |
| iron, aluminium and magnesium |
| copper, zinc and antimony. |
12.Elinvar, an alloy used in precision instruments, hair springs for watches, etc. contains the following element as principal alloying element |
| iron |
| copper |
| aluminium |
| zinc |
| nickel. |
13.Bronze contains |
| 70% copper and 30% zinc |
| 90% copper and 10% tin |
| 85-92% copper and rest tin with little lead and nickel |
| 70-75% copper and rest tin |
| 90% copper and 1C% zinc. |
14.Gun metal contains |
| 70% copper and 30% zinc |
| 90% copper and 10% tin |
| 85-92% copper and rest tin with little lead and nickel |
| 70-78% copper and rest tin |
| 85-92% copper and rest zinc. |
15.Aluminium bronze contains aluminium and copper in the ratio of |
| 50 : 50 |
| 40 : 60 |
| 60 : 40 |
| 10 : 90 |
| 90 : 10. |
More Engineering Materials QUESTIONS AND ANSWERS available in next pages
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