Mechanical Engineering - Engineering Materials

31.
Haematite iron ore contains iron about
30%
45%
55%
70%
Answer: Option
Explanation:
No answer description is available. Let's discuss.

32.
The material in which the atoms are arranged regularly in some directions but not in others, is called
amorphous material
mesomorphous material
crystalline material
none of these
Answer: Option
Explanation:
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33.
The steel produced by bessemer or open hearth process is __________ to that produced by L-D process.
superior
inferior
Answer: Option
Explanation:
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34.
Crystal structure of a material is, generally, examined by
naked eye
optical microscope
metallurgical microscope
X-ray techniques
Answer: Option
Explanation:
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35.
Iron-carbon alloys containing 1.7 to 4.3% carbon are known as
eutectic cast irons
hypo-eutectic cast irons
hyper-eutectic cast irons
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.