IndiaBIX

Mechanical Engineering - Engineering Materials - Discussion

Discussion Forum : Engineering Materials - Section 1 (Q.No. 35)
Engineering Materials
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.
Discussion:
18 comments Page 1 of 2.
Vinay BEL said:   5 years ago
2.1 - 4.3 %c hypo eutectic.

4.3 - 6.67 %c hyper eutectic.
(1)
Deepak Soni said:   7 years ago
Eutectic cast iron with a carbon percentage (%C) equal to 4.3%.
Hypoeutectic cast iron with a carbon percentage (%C) from 2 to 4.3%.
Hypereutectic cast iron with a carbon percentage (%C) above 4.3%.
(1)
Mahesh said:   7 years ago
1.7 to 2 = hyper eutectoid.
2 to 6.67 = cast iron.
Varadraj said:   7 years ago
For Cast Iron, the % of 'C' must be greater than 2.1.

So, I think that the answer should be D.
(1)
Darshan said:   7 years ago
@Sobharam Yadav.

Thread cutting.
Kaju said:   7 years ago
You are right, your explanation is very good Thanks @Ram.
Kartik kaushal said:   8 years ago
The iron-carbon alloys containing up to 1.7% carbon are called steels and those containing over 1.7% carbon are called cast irons. The iron-carbon alloys containing 4.3% carbon are called eutectic cast irons, above 4.3% carbon are termed as hyper-eutectic cast iron and those in the range of 1.7 to 4.3% carbon are called hypo-eutectic cast irons.
(1)
SOBHARAM YADAV said:   8 years ago
In which of the following operation on length, the spindle speed will be minimum
(A) Knurling.
(B) Taper turning
(C) Parting of.
(D) Thread cutting
Akhila said:   8 years ago
The alloy containing more then 2% iron is know as 1-Mild Steel, 2-Cast Iron, 3-High SpeedSteel, 4-Low alloy Steel.
Rajesh said:   8 years ago
You are correct. Thanks @Ram.
Post your comments here:

Your comments will be displayed after verification.

Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers