One shot Marathon Series II Material Science for ESE & GATE ME Exams

Question 1

The crystal structure of Cementite is:

Question 2

The crystal structure of Sodium Chloride(NaCl) crystal is_________.

Question 3

In Edge dislocation, Burgers vector is ______.

Question 4

Cast steel crankshaft surface is hardened by

Question 5

Shear stress (τ) to move a dislocation varies with dislocation density (ρ) as ________.

Question 6

In case carburizing, carbon is introduced to form high carbon layer at the surface. The carbon is introduced in the form of

Question 7

Which of the following crystal systems does not have unequal axial relationships?

Question 8

The fatigue strength of metal is improved by setting up compressive stresses in the surface by process known as __________.

Question 9

Coordination number and atomic packaging fraction for Gold is _______ and _______ respectively.

Question 10

All of the following statements about yield point phenomenon is true except

Question 11

‘Tempering’ of quenched martensite steel is necessary to improve the _________.

Question 12

The Bauschinger effect is observed when

Question 13

A perfect crystal structure crystallizes in FCC crystal structure. If a particular plane consists of 2 number of atoms. Find the planar density (atoms/nm²) of the structure having for the same plane if side length is 4 nm.

Question 14

Match List I with List II and select the correct option.

Question 15

For a BCC crystal structure the size of the unit cell is 22 nm, assuming a perfect crystalline structure, find the radius of atom of the BCC crystal structure in nm

Question 16

In a temperature-time diagram (TTT diagram), the time scale is _____.

Question 17

Which one of the following is most symmetrical ________?

Question 18

For a vacancy defect to be said as Schottky defect, the necessary condition is _________.

Question 19

The interplanar distance (in nm ) between the planes having miller indices as (1,1,1) for a cystal structure having perfect crystalline material of unit size 34 nm is ____.

Question 20

Steel which destroys by burning is called __________.

Question 21

Which of the following properties depends on the crystal imperfection?

Question 22

Match List I (Property) with List II (Testing machine) and select the correct answer using the codes given below the list:

Question 23

The atomic packing factor for a crystal structure is 0.70 If the radius of atom is 0.3548 Å and the side length of unit cell is 1.0Å, then the effective number of atoms in the cell is ____.

Question 24

___________ structure is obtained by austempering process of heat treatment.

Question 25

The alloying element mainly used to improve the endurance strength of steel materials is