Q.

What is the order of elastic modulus for Nickel alloys, Lead alloys, Molybdenum alloys, alumina?

A. pb < mo < ni < al2o3
B. ni < pb < mo < al2o3
C. pb < ni < mo < al2o3
D. pb < ni < al2o3 < mo
Answer» C. pb < ni < mo < al2o3
Explanation: lowest elastic modulus is of lead and its alloys of 14-18 gpa. ni and mo alloys have elastic modulus of 180-214 and 330-360 gpa respectively. al2o3 has highest e among the four of 415 gpa.
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