Mechanical Engineering : Engineering Materials QUESTIONS AND ANSWERS :: part7 : 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.Monel metal contains |
| 63 to 67% nickel and 30% copper |
| 88% copper and 10% tin and rest zinc |
| alloy of tin, lead and cadmium |
| malleable iron and zinc |
| none of the above. |
22.Admiralty gun metal contains |
| 63 to 67% nickel and 30% copper |
| 88% copper, 10% tin and rest zinc |
| alloy of tin, lead and cadmium |
| iron scrap and zinc |
| none of the above. |
23.Addition of lead and bismuth to aluminium results in |
| improvement of casting characteristics |
| improvement of corrosion resistance |
| one of the best known age and precipitation-hardening systems |
| improving machinability |
| none of the above. |
24.Perminvar alloy having constant permeability is an alloy of |
| nickel, copper and iron |
| nickel, copper and zinc |
| copper, nickel and antimony |
| iron, zinc and bismuth |
| antimony, copper and zinc. |
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