Question : Which one of the following is the purest commercial form of iron?
Option 1: Pig iron
Option 2: Steel
Option 3: Stainless steel
Option 4: Wrought iron
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Correct Answer: Wrought iron
Solution : The correct option is Wrought iron.
Its carbon percentage is 0.12 - 0.25%. Impurities (Mn, Si, P) are present in low amounts. On melting of cast iron with scrap iron in a reverberatory furnace, wrought iron is formed. It is relatively soft, malleable and fatigue-resistant. The mechanical properties and corrosion resistance are also good in wrought iron.
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Question : Which one of the following contains the maximum percentage of Carbon?
Option 1: Cast iron
Option 2: Stainless steel
Option 3: Wrought iron
Option 4: High speed steel
Question : Which of the following industries is its major consumer in India?
Option 1: Iron and steel
Option 2: Aviation
Option 3: Automobile
Option 4: Chemical
Question : Among the following, in which material is the speed of sound is highest? (at 25°C)
Option 1: Nickel
Option 3: Iron
Option 4: Aluminium
Question : Directions: In the following question, select the one which is different from the other three alternatives.
Option 1: 1, 2, 4, 7
Option 2: 2, 3, 4, 9
Option 3: 3, 2, 4, 8
Option 4: 4, 2, 3, 9
Question : Which of the following is a public sector industry?
Option 1: Bharat Heavy Electricals Limited
Option 2: Dabur industry
Option 3: Bajaj Auto
Option 4: Tata Iron and Steel Company Limited
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