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Engineering Materials - Interview Questions and Answers

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56. Which of the following alloys does not contain tin
A. white metal
B. solder admiralty
C. fusible metal
D. phosphor bronze
E. gun metal.
Explanation:
57. Delta iron occurs at temperature of
A. room temperature
B. above melting point
C. between 1400�C and 1539�C
D. between 910�C and 1400�C
E. none of the above.
Explanation:
58. Addition of silicon to aluminium results in
A. improvement of casting characteristics
B. improvement of corrosion resistance
C. one of the best known age and precipitation-hardening systems
D. improving machinability
E. none of the above.
Explanation:
59. Which of the following has highest specific strength of all structural materials
A. magnesium alloys
B. titanium alloys
C. chromium alloys
D. magnetic steel alloys
E. none of the above.
Explanation:
60. Constantant an alloy used in thermocouples is an alloy of
A. copper and tin
B. copper and zinc
C. copper and iron
D. copper and nickel
E. copper and chromium.
Explanation:
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