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Mechanical Engineering - Engineering Materials

Exercise : Engineering Materials - Section 1
41.
Iron ore is, usually, found in the form of
oxides
carbonates
sulphides
all of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
42.
The hardness of steel increases if it contains
pearlite
ferrite
cementite
martensite
Answer: Option
Explanation:
No answer description is available. Let's discuss.
43.
In full annealing, the hypo-eutectoid steel is heated from 30° C to 50° C above the upper critical temperature and then cooled
in still air
slowly in the furnace
suddenly in a suitable cooling medium
any one of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
44.
Ferrite and pearlite makes the steel soft and ductile.
Agree
Disagree
Answer: Option
Explanation:
No answer description is available. Let's discuss.
45.
The lower critical temperature
decreases as the carbon content in steel increases
increases as the carbon content in steel increases
is same for all steels
depends upon the rate of heating
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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