Bissoy.com
Doctors Medicines MCQs Q&A

At higher temperature, the lattice diffusion is predominant whereas at lower temperature diffusion along the dislocation core is predominant.

At higher temperature, the lattice diffusion is predominant whereas at lower temperature diffusion along the dislocation core is predominant. Correct Answer True

At higher temperature, the diffusion coefficient of the atoms is high, so the lattice diffusion is easy to take place. As the temperature reduces, the diffusion along the lattice becomes difficult and it chooses the more comfortable path which is along the dislocation core.

Related Questions

A map shows the elevations of Darjeeling, Gangtok, Kalimpong, Pelling, and Siliguri. Kalimpong is at a lower elevation than Gangtok, Pelling is at a lower elevation than Gangtok. Pelling is at a higher elevation than Siliguri. Darjeeling is at a higher elevation than Gangtok. Which of the following statements can be inferred from the paragraph above? i. Pelling is at a higher elevation than Kalimpong ii. Kalimpong is at a lower elevation than Darjeeling iii. Kalimpong is at a higher elevation than Siliguri iv. Siliguri is at a lower elevation than Gangtok
The Burgers vector b is the vector which defines the magnitude and direction of slip. For a pure edge dislocation, the Burgers vector is perpendicular to the dislocation line, while for a pure screw dislocation, the Burgers vector is parallel to the dislocation line.
The interaction of screw dislocation and edge dislocation produces ______ on the edge dislocation and _______ on the screw dislocation.
Which of the following statements are true? a. In overhead lines, inductance is more predominant whereas capacitance is in the cable. b. In overhead lines, capacitance is more predominant whereas inductance is in the cable. c. Cost of cable is high compared to the overhead lines. d. Cost of cable is low compared to overhead lines
At high temperatures diffusion through the lattice is rapid and g*Dp / D1 is very small so that the dislocation contribution to the total flux of atoms is_______ (Dp, D1 are diffusivity through pipe and defect free lattice and g is the cross-sectional area of ‘pipe’ per unit area of matrix).
An elliptical dislocation loop is gliding on plane ABCD of a single crystal of BCC material as shown in the following figure. It is gliding along the burger vector 'b'. Identify the correct statement.
Physics of Metals in Metallurgy mcq question image
P. Plane ABCD belongs to the family of (110).
Q. Burger vector 'b' belong to direction.
R. Dislocation has the edge character at point x and the screw character at point z.
S. Dislocation has the screw character at point x
There are six students P, Q, R, S, T and U in class who scored some marks in their final examination. I. P is the second-lowest among all. II. Q is neither top nor least ranked among all but a higher rank than S. III. R's rank is higher than U but lower than T while U scores lower than P. IV. S is lower than T but higher than R. Who is ranked 3rd last in the class?
Seven boys are living in different buildings at a different height. Abir, Ayush, Anand, Ajay, Alok, Nakul and Nandu. Ayush is living on a higher floor than Nakul and Abir. Abir lives on a higher floor than Nakul and Alok is on the lowest floor. Nandu lives in a lower height than Ayush but higher than Abir and Nakul. Ajay is the one who lives lower than Nakul. Anand lives on a higher floor than Ayush.  Find whose building is the highest one?
The dynamic recrystallization occurs at high dislocation density whereas the dynamic recovery occurs at lower dislocation density.
Consider the following statements regarding the importance of diffusion and choose the correct answer:
1. The exchange of gases takes place by the principle of dependent diffusion
2. The process of diffusion is involved in transpiration of water vapours
3. The ions are absorbed by the simple diffusion during passive salt uptake
4. Diffusion is an effective means of transport of substances over a very short distance and helps in the translocation of food materials