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SSC JE 2019-20: Materials Science
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Question 1
Addition of vanadium in steel results in improvement of _______.
Question 2
The micro-structure of α ferrite iron is ________.
Question 3
When at a point two solid phase changes to one solid phase on cooling then it is known as _________.
Question 4
An Orthorhombic unit cell satisfies which of the following equations _______.
Question 5
From the lists given below, choose the most appropriate set of heat treatment process and the corresponding process characteristics ______.
Question 6
Stainless steel contains ________.
Question 7
Which one of the following pairs of tests has been developed to evaluate the fracture resistance of engineering materials, subjected to dynamic loads or impacts?
Question 8
Which is correct for spheroidising treatment process?
Question 9
Which of the following heat treatment processes are not used for surface hardening ?
Question 10
Match items from groups I, II and III:
Group-I (Structure)
A) Simple cubic
B) Body centered
C) Face centered
D) Hexagonal closed packed
Group-II (Effective no. of atoms)
P) 2
Q) 1
R) 4
S) 6
Group-III (Co-ordination No.)
T) 8
U) 6
W) 12
Group-I (Structure)
A) Simple cubic
B) Body centered
C) Face centered
D) Hexagonal closed packed
Group-II (Effective no. of atoms)
P) 2
Q) 1
R) 4
S) 6
Group-III (Co-ordination No.)
T) 8
U) 6
W) 12
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