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Engineering Materials - Interview Questions and Answers

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61. Muntz metal contains copper and zinc in the ratio of
A. 50 : 50
B. 40 : 60
C. 60 : 40
D. 20 : 80
E. 80 : 20.
Explanation:
62. Permalloy is a
A. kind of stainless steel
B. none ferrous alloy
C. polymer
D. cutting tool material
E. nickel and iron alloy having high per�meability.
Explanation:
63. Delta metal is an alloy of
A. copper, zinc and iron
B. iron, nickel and copper
C. iron, lead and tin
D. iron, aluminium and magnesium
E. copper, zinc and antimony.
Explanation:
64. Elinvar, an alloy used in precision instruments, hair springs for watches, etc. contains the following element as principal alloying element
A. iron
B. copper
C. aluminium
D. zinc
E. nickel.
Explanation:
65. Bronze contains
A. 70% copper and 30% zinc
B. 90% copper and 10% tin
C. 85-92% copper and rest tin with little lead and nickel
D. 70-75% copper and rest tin
E. 90% copper and 1C% zinc.
Explanation:
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