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Engineering Materials - Interview Questions and Answers

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51. Which is the false statement about wrought iron. It has
A. high resistance to rusting and cor�rosion
B. high ductility
C. ability of hold protective coating
D. easily weldable characteristics
E. uniform strength in all directions.
Explanation:
52. Free cutting steels
A. are used where ease in machining is the criterion
B. contain carbon in free form
C. require least cutting force
D. do not exist
E. can be cut freely even under adverse conditions.
Explanation:
53. White metal contains
A. 63 to 67% nickel and 30% copper
B. 88% copper and 10% tin and rest zinc
C. alloy of tin, lead and cadmium
D. silver and chromium
E. malleable cast iron and silver.
Explanation:
54. Which of the following alloys does not have copper as one of the constituents
A. delta metal
B. monel metal
C. constantan
D. nichrome
E. silicon bronze.
Explanation:
55. Addition of manganese to aluminium results in
A. improvement of casting charac�teristics
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:
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