Engineering Questions with Answers - Multiple Choice Questions
Chemical Industry MCQ’s – Steel
1 - Question
What are the raw materials needed for the manufacture of steel?
a) Pig iron
b) Nickel + oxygen
c) Pig iron + oxygen
d) Pig iron + nitrogen
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Explanation: Steel can be manufactured from pig iron with air or oxygen. Pig iron is manufactured from iron ore, coke and limestone.
2 - Question
Removal of impurities from pig iron by oxidation gives steel.
a) True
b) False
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Explanation: Steel making involves the removal of undesirable elements from pig iron by oxidation followed by the addition of the necessary ingredients to make the type of steel required.
3 - Question
What is the temperature of the blast furnace in steel plants?
a) 100 °C
b) 1000 °C
c) 500 °C
d) 2200 °C
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Explanation: Blast furnace is used to break down the pig iron at high temperature condition. The maximum temperature of the blast furnace is around 2200°C
4 - Question
Which among the following impurity is not added to steel?
a) Silicon
b) Carbon
c) Manganese
d) Arsenic
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Explanation: Sulphur is added in steel to improve its machineability but lowers the ductility. Carbon increases the strength of steel whereas manganese increases the hardenability.
5 - Question
Which method is commonly used for the manufacture of steel?
a) Open hearth process
b) Contact process
c) Kraft’s process
d) Monte catini process
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Explanation: In open hearth process tons of molten pig iron, steel and iron ore is charged. The limestone reacts with phosphorous. The iron ore furnishes oxygen.