Questions 271–280 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 28 of 65

Question 11

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The Taylor series expansion around

of the function

truncated to first two terms is __________
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Question 12

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According to Sieverts’ law, the equilibrium solubility of N₂ (gas) in molten steel is proportional to __________
Given: Equilibrium partial pressure of N₂ (gas) is

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Question 13

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Titanium is produced commercially by __________
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Question 14

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Magnesium treatment is carried out to produce __________ cast iron.
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Question 15

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The sequence of peaks corresponding to the planes (in the order of increasing

) observed in the X-ray diffractogram of a pure copper powder sample is __________
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Question 16

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Which one of the following Non Destructive Testing (NDT) techniques CANNOT be used to identify volume defects in the interior of a casting?
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Question 17

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Neutral point in rolling is defined as the point along the surface of contact between the roll and the sheet, where the surface velocity of the roll is __________
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Question 18

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In fluid flow, the dimensionless number that describes the transition from laminar to turbulent flow is ______
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Question 19

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Which one of the following elements has the slowest removal rate from hot metal in basic oxygen furnace (BOF) steelmaking?
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Question 20

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Match the nature of bond (Column I) with material (Column II)
Column I: (P) Ionic (Q) Covalent (R) Metallic (S) Secondary
Column II: (1) Diamond (2) Silver (3) NaCl (4) Solid argon
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