Engineering Materials - Interview Questions | Exam2Win

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66. Gun metal 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. 70-78% copper and rest tin

E. 85-92% copper and rest zinc.

Explanation:

67. Aluminium bronze contains aluminium and copper in the ratio of

A. 50 : 50

B. 40 : 60

C. 60 : 40

D. 10 : 90

E. 90 : 10.

Explanation:

68. The elastic stress strain behavior of rubber is

A. linear

B. non-linear

C. plastic

D. no fixed relationship

E. unpredictable behavior.

Explanation:

69. The alloy used for making electrical resistances and heating elements is

A. nichrome

B. invar

C. magnin

D. elinvar

E. peiminvar.

Explanation:

70. German silver contains

A. 1% silver

B. 2.5% silver

C. 5% silver

D. 10% silver

E. 100% silver.

Explanation: