During carburization to obtain a twofold increase in penetration requi – McqOptions

MCQOPTIONS

1.	During carburization to obtain a twofold increase in penetration requires a __________
A.	Fourfold decrease in time
B.	Threefold increase in time
C.	Fourfold increase in time
D.	Twofold increase in time
Answer» D. Twofold increase in time

Discussion

No Comment Found

Related MCQs

During carburization to obtain a twofold increase in penetration requires a __________
After a time t=2* ( is taken as relaxation time), the amplitude of concentration decreases by__
Diffusion coefficient of B-atom is given as 2.5m2/s and L value is given as 2m, calculate the relaxation time?
Which of the following equation is related to Fick s second law_________
On average, the fraction of atoms with an energy of G or more than the mean energy is given by_____
The activation enthalpy for interstitial diffusion increases as the size of the interstitial atom increases.
To move an interstitial atom to an adjacent interstice, the atoms of the parent lattice must be forced apart into higher energy positions. The work that must be done to accomplish this process causes____
During decarburization of steel, the surface concentration is reduced to a very low value.
The rest positions of the interstitial atoms are positions of____________
Particularly violent oscillation of an interstitial atom or some chance coincidence of the movement of the matrix and interstitial atoms will result in a jump.