Mechanical Engineering - Engineering Materials

36.
Silicon is added in low carbon steels to
make the steel tougher and harder
make the steel of good bending qualities
raise the yield point
all of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.

37.
According to Indian standard specifications, cast iron designated by 'FG 150' means
white cast iron with B.H.N. 150
white cast iron with 150 MPa as minimum compressive strength
grey cast iron with B.H.N. 150
grey cast iron with 150 MPa as minimum tensile strength
Answer: Option
Explanation:
No answer description is available. Let's discuss.

38.
The red flame during the operation of a bessemer converter indicates that the
air is burning out silicon and manganese
silicon and manganese has burned out and carbon has started oxidising
converter must be tilted to remove the contents of the converter
red flame does not occur during the operation of a bessemer converter
Answer: Option
Explanation:
No answer description is available. Let's discuss.

39.
Phosphor bronze has
high resistance to corrosion
good wearing qualities and high elasticity
valuable cold working property
all of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.

40.
In the austempering process of heat treatment, austenite changes into
martensite
troostite
sorbite
bainite
Answer: Option
Explanation:
No answer description is available. Let's discuss.