Eutectoid steel contains following percentage of carbon_______________?
Eutectoid steel contains following percentage of carbon_______________?
A. 0.02%
B. 0.3%
C. 0.63%
D. 0.8%
E. 1.2%.
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The metallic structure of mild steel is_________________?
The metallic structure of mild steel is_________________?A. body centred cubic
B. face centred cubic
C. hexagonal close packed
D. cubic structure
E. orthorhombic crystalThe usual composition of a soldering alloy is__________________?
The usual composition of a soldering alloy is__________________?A. tin, lead and small percentage of antimony
B. tin and lead
C. tin, lead and silver
D. tin and copper
E. tin, copper and leadThe brown smoke during the operation of a bessemer Converter indicates that the
Question: The brown smoke during the operation of a bessemer Converter indicates that the
[A].air is burning out silicon and managanese [B].
silicon and manganese has burnt and carbon has started oxidising [C].
the converter must be titled to remove the contents of the converter [D].
the brown smoke does not occur during the operation of a bessemer converter Answer: Option A
Explanation:
No answer description available for this question.
Hardness of lower bainite (tempered martensite) is about________________?
Hardness of lower bainite (tempered martensite) is about________________?A. RC 65
B. RC 48
C. RC 57
D. RC 80
E. RC 32Duralumin contains
Question: Duralumin contains
[A].3.5 to 4.5% copper, 0.4 to 0.7% magnesium, 0.4 to 0.7% manganese and rest aluminium [B].
3.5 to 4.5% copper, 1.2 to 1.7% managanese, 1.8 to 2.3% nickel, 0.6% each of silicon, magnesium and iron, and rest aluminium [C].
4 to 4.5% magnesium, 3 to 4% copper and rest aluminium [D].
5 to 6% tin, 2 to 3% copper and rest aluminium Answer: Option A
Explanation:
No answer description available for this question.
For the allotropic forms of iron, the points of arrest are __________________?
For the allotropic forms of iron, the points of arrest are __________________?A. the points where no further change oc-curs
B. constant for all metals
C. the points where there is no further flow of metal
D. the points of discontinuity
E. the points where major changes take place