# SOM and TOM and Material Science

SOM and TOM and Material Science
Question:-
Option (A)
10 cm
Option (B)
30 cm
Option (C)
20 cm
Option (D)
50 cm
Correct Option:
C
Question Solution:
ω1AB = ω2(AB + 30)
5AB = 2(AB + 30)
or AB = 20 cm
Question:-
Option (A)
45° in the direction of rotation of the link containing the slider
Option (B)
90° in the direction opposite to the rotation of the link containing the slider
Option (C)
90° in the direction of rotation of the link containing the slider
Option (D)
180° in the direction opposite to the rotation of the link containing the slider
Correct Option:
C
Question Solution:
Coriolis component is given by
a = 2 υω
Its direction is such so as to rotate the slider velocity vector in the same sense as the angular velocity of OA.
Question:-
Option (A)
martensite at low temperatures
Option (B)
martensite at higher temperatures
Option (C)
bainite at low temperature
Option (D)
bainite at higher temperature
Correct Option:
A
Question Solution:
Tempering is the process of annealing martensite at low temperatures. When tempering occurs at temperature below 200°, stress relief occurs. The
martensite grains retains their strength.