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Engineering Materials - Interview Questions and Answers

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146. Machining properties of steel are improved by adding
A. sulphur, lead, phosphorous
B. silicon, aluminium, titanium
C. vanadium, aluminium
D. chromium, nickel
E. lubricants.
Explanation:
147. In which of the following cases, consideration of creep is important
A. flywheel of steam engine
B. cast iron pipes"
C. cycle chains
D. gas turbine blades
E. piston I.C. engine.
Explanation:
148. Maximum percentage of carbon in austenite is
A. 0.025%
B. 0.26%
C. 0.8%
D. 1.25%
E. 1.7%.
Explanation:
149. The basic constituents of Hastelloy are
A. aluminium, copper etc.
B. nickel, molybdenum etc.
C. nickel, copper, etc.
D. all of the above
E. none of the above.
Explanation:
150. Pick up the wrong statement Nickel and chromium in steel help in
A. providing corrosion resistance
B. improving machining properties
C. providing high strength at elevated temperatures
D. raising the elastic limit
E. improving the resilience and ductility.
Explanation:
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