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Engineering Materials - Interview Questions and Answers

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1. Pure iron is the structure of
A. ferrite
B. pearlite
C. anstenite
D. ferrite and cementite
E. ferrite and pearlite.
Explanation:
2. Mild steel belongs to the following category
A. low carbon steel
B. medium carbon steel
C. high carbon steel
D. alloy steel
E. special steel.
Explanation:
3. Compressive strength of grey cast iron in tonnes/cm is of the order of
A. 3- 5
B. 5-7
C. 7-10
D. 10-15
E. 15-22.
Explanation:
4. Cobalt in steel
A. improves wear resistance, cuttin ability and toughness
B. refines grain size and produces les tendency to caricaturisation, improve corrosion and heat resistant proper ties
C. improves cutting ability and reduce harden ability
D. gives ductility, toughness, tensil strength and anti corrosion properties:
E. none of the above.
Explanation:
5. Large forgings, crank shafts, axles normally contain carbon upto
A. 0.05 to 0.20%
B. 0.20 to 0.45%
C. 0.45 to 0.55%
D. 0.55 to 1.0%
E. 1.0 to 1.2%.
Explanation:
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