7000+ Objective Questions on Physical Metallurgy - 2

Question: 6

Which one of the following is a ferrite stabiliser in steels?

(A) Cr

(B) Cu

(C) Mn

(D) Ni

Question: 7

Creep resistance decreases due to

(A) Low stacking fault energy

(B) High melting point

(C) Fine dispersoid size

(D) Small grain size

Question: 8

The elastic strain energy of a unit length of an edge dislocation a compared to that of a screw dislocation is

(A) Double

(B) Less

(C) Equal

(D) More

Question: 9

A defect that is bounded by two mirror planes is

(A) Edge dislocation

(B) Grain boundary

(C) Stacking fault

(D) Twin

Question: 10

Which one of the following elements is an austenite stabilizer?

(A) Tungsten

(B) Vanadium

(C) Molybdenum

(D) Nitrogen