Question:
Which one of the following statements is incorrect?
Which one of the following statements is incorrect?
Show Hint
Dislocations are always line defects, never point defects.
Updated On: Jun 29, 2026
- In substitutional solid solutions, impurity atoms replace host atoms in the lattice
- Dislocations are zero-dimensional crystalline defects
- Microscopy is used for observing microstructure using suitable microscopes
- The intercept method is used to measure grain size in a material
Show Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Concept:
Crystal defects are classified as:
• 0D → point defects
• 1D → line defects (dislocations)
• 2D → planar defects
Step 1: Analyze dislocations.
Dislocations are:
• line defects
• one-dimensional in nature
• not zero-dimensional Hence statement (B) is incorrect.
Step 2: Verify other statements.
• (A) correct → substitutional solid solution
• (C) correct → microscopy usage
• (D) correct → grain size measurement Final Answer: \[ \boxed{\text{Dislocations are zero-dimensional crystalline defects}} \]
• 0D → point defects
• 1D → line defects (dislocations)
• 2D → planar defects
Step 1: Analyze dislocations.
Dislocations are:
• line defects
• one-dimensional in nature
• not zero-dimensional Hence statement (B) is incorrect.
Step 2: Verify other statements.
• (A) correct → substitutional solid solution
• (C) correct → microscopy usage
• (D) correct → grain size measurement Final Answer: \[ \boxed{\text{Dislocations are zero-dimensional crystalline defects}} \]
Was this answer helpful?
0
0
Top TS PGECET Metallurgical Engineering Questions
- “It is impossible for a heat engine to be 100% efficient.” This statement is related to:
- If a system is completely ordered and the atoms are at rest at zero Kelvin, then the entropy of the system is:
- Electrodes used in anodizing process are:
- Units for quantity of electricity are:
- Identify the wrong statement:
View More Questions
Top TS PGECET Phase Transformations Questions
- Bain distortion model explains:
- Minimum percent of nickel needed in stainless steel to stabilize the austenitic FCC phase is:
- In a single component system, the maximum number of phases that can co-exist in equilibrium is:
- The figure shows variation of heat capacity with temperature for Nickel (0–800 K). If the curve shows discontinuity at point P, then this is due to:
- At composition $C_a$, the free energy curve has a minimum. Which statement is correct?
View More Questions
Top TS PGECET Questions
- If \( P = \begin{pmatrix} 1 & 1 & 1 \\ 0 & 1 & 2 \\ 0 & 0 & 1 \end{pmatrix} \) is the modal matrix of \( A = \begin{pmatrix} 1 & 1 & 0 \\ 0 & 2 & 2 \\ 0 & 0 & 3 \end{pmatrix} \) then the sum of all the elements of \( P^{-1}AP \) is
- If the system of equations \( kx + y + z = k - 1 \), \( x + ky + z = k - 1 \), and \( x + y + kz = k - 1 \) has infinite solutions, then \( k \) is
- The value of the integral \( \int_C (2xy - x^2) \, dx + (x^2 + y^2) \, dy \) where \( C \) is the boundary of the region enclosed by \( y = x^2 \) and \( y^2 = x \), described in the positive sense, is
- Let \( f(x) = \log x \). The number \( C \) strictly between \( e^2 \) and \( e^3 \) such that its reciprocal is equal to \( \frac{f(e^3) - f(e^2)}{e^3 - e^2} \) is
- The solution of the differential equation \( (D^2 + 2)y = x^2 \) is
View More Questions