Question: Eutectoid reaction occurs at
[A].600°C
723°C
1147°C
1493°C
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
Engineering Materials
A steel with 0.8% carbon is known as
Question: A steel with 0.8% carbon is known as
[A].eutectoid steel
hyper-eutectoid steel
hypo-eutectiod steel
none of these
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
Pearlite is a combination of 87% ferrite and 13% cementite.
Question: Pearlite is a combination of 87% ferrite and 13% cementite.
[A].Yes
No
[A].
[B].
Answer: Option A
Explanation:
No answer description available for this question.
A coarse grained steel
Question: A coarse grained steel
[A].is less tough and has a greater tendency to distort during heat treatment
is more ductile and has a less tendency to distort during heat treatment
is less tough and has a less tendency to distort during heat treatment
is more ductile and has a greater tendency to distort during heat treatment
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
A fine grained steel
Question: A fine grained steel
[A].is less tough and has a greater tendency to distort during heat treatment
is more ductile and has a less tendency to distort during heat treatment
is less tough and has a less tendency to distort during heat treatment
is more ductile and has a greater tendency to distort during heat treatment
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
A material is said to be allotropic, if it has
Question: A material is said to be allotropic, if it has
[A].fixed structure at all temperatures
atoms distributed in random pattern
different crystal structures at different temperatures
any one of the above
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
Crystal structure of a material is, generally, examined by
Question: Crystal structure of a material is, generally, examined by
[A].naked eye
optical microscope
metallurgical microscope
X-ray techniques
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
Micro-structure of a material is, generally, examined by
Question: Micro-structure of a material is, generally, examined by
[A].naked eye
optical microscope
X-ray techniques
none of these
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
Macro-structure of a material is, generally, examined by
Question: Macro-structure of a material is, generally, examined by
[A].naked eye
optical microscope
metallurgical microscope
X-ray techniques
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
Which of the following statement is true about brittle fracture?
Question: Which of the following statement is true about brittle fracture?
[A].High temperature and low strain rates favour brittle fracture
Many metals with hexagonal close packed (H.C.P) crystal structure commonly show brittle fracture
Brittle fracture is always preceded by noise
Cup and cone formation is characteristic for brittle materials
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.