Q1:

Consider the following statements regarding the behavior of dislocations:

1. Only edge dislocation and mixed dislocation can have glide motion.

2. A screw dislocation cannot have glide motion.

3. Dislocation moves in the direction perpendicular to that of shear stress.

4. Motion of dislocation occurs on slip plane that contains vector and direction vector.

Which of the above statement are correct?

Q2:

The behavior of metals in which strength of a metal is increases and the ductility is decreased on heating at a relatively low temperature after cold-working is known as

Q3:

Jominy end-quench test is carried out to determine

Q4:

Which of the following method are used for protection against fracture?

1. Avoid sharp corners and notches in the part of eliminate points of stress concentration

2. Provide better finish to the surface by polishing

3. Introduce residual tensile stresses on the surface

Which of these statements are correct:

Q5:

Match List-I with List-II and select the correct answer using the code given below the lists:

	List-I		List-II
A.	Elasticity	1.	Deform non elastically without fracture
B.	Malleability	2.	Undergo plastic deformation under tensile load
C.	Ductility	3.	Undergo plastic deformation under compressive load
D.	Plasticity	4.	Return to its original on unloading

Codes:

Q6:

Cleavage fracture is a form of

Q7:

What are the materials which show direction dependent properties, called?

Q8:

Vibration damping in machinery is best achieved by means of base structure made of which one of the following materials?

Q9:

Consider the following statements:

1. Cast Iron has poor ability to damp vibrations.

2. Cast Iron higher compressive strength compared to that of steel.

3. Cast Iron parts are suitable where permanent deformation is preferred over fracture

Which of these statements is/are correct?

Q10:

Consider the following statement regarding material:

1. In micro structure external forms of the crystal may reflect the internal symmetry of atom

2. Electronic structure is arrangement of electrons in different orbit of atom

3. A crystal is formed by a non-repeating of in uni-direction

4. Nuclear structure can be studied by Mossbauer studies

Which of these statements are correct?

Q11:

Line imperfection in a crystal is called

Q12:

Consider the following regarding their crystal structure

1. Alpha iron

2. Aluminum

3. Nickel

4. Zinc

Which of these belong to FCC structure?

Q13:

In a triclinic unit cell

Q14:

Surface imperfection which separate two orientation that are mirror image of one another is called

Q15:

Consider the following:

1. Crystal structure

2. Relative size

3. Chemical affinity

4. Valency

Which of these factors govern relative solubility of two metals in each other in the solid state?

Q16:

Which one of the following defects is Schottky defect’?

Q17:

Which one of the following is correct for “Burger’s vector” in screw dislocation?

Q18:

What is the approximate strain energy expression for a dislocation of unit length, irrespective of its edge or screw character?

Q19:

What is the planer density of (100) plane in FCC (face-centred) crystal with unit cell side a equal to?

Q20:

In Zinc Blende structure each atom is surrounded by four atoms of the opposite kind which are located at the corners of which one of the following?

Q21:

A screw dislocation

1. Lies parallel to its Burger’s vector

2. Lies perpendicular to its Burger’s vector

3. Moves in a perpendicular direction to its Burger’s vector

4. Moves in an inclined direction to the Burger’s vector

Select the correct answer using the codes given below:

Q22:

Match List-I (Crystal Structure) with List-II (Example) and select the correct answer using the codes given below the lists:

	List-I		List-II
A.	Simple Cube	1.	Zinc
B.	Body-centred Cubic	2.	Copper
C.	Face-centred Cubic	3.	$\alpha$- Iron
D.	Hexagonal Close Packed	4.	Manganese

Codes:

Q23:

Which one of the following pairs of axis lengths (a, b, c) and interaxial angles $\left(\alpha ,\beta ,\gamma \right)$represents the tetragonal crystal system?

Q24:

The set of Miller indices of the plane shown in the given figure is

Q25:

A unit cell of a crystal is shown in given figure.

The miller indices of the direction (arrow) shown in the figure is