Steel Making Mid - I, September - 2014

1.The product of cementation process is _____ steel.
  • blister
  • shear
  • spring
  • wootz
Answer: A
2.The oxidising agent in the Bessemer process is __________
  • air
  • Pig iron
  • oxygen
  • carbon monoxide
Answer: A
3.The efficiency of steel making process is improved when __________
  • Downtime is low
  • Downtime is high
  • Tap to tap time is high
  • Campaign time is low
Answer: A
4.The fuel in the acid Bessemer process is ________
  • Sulphur
  • Silicon
  • phosphorus
  • coke
Answer: B
5.Dephosphorisation is favoured mostly in ________ process.
  • Acid Bessemer
  • Acid OHF
  • Basic Bessemer
  • Basic OHF
Answer: A
6.Decarburisation is very slow in _________ process.
  • Bessemer
  • OHF
  • LD
  • Kaldo
Answer: B
7.Consumable lance is used from the front door in the modified _________ process.
  • Bessemer
  • OHF
  • LD-AC
  • SIP
Answer: B
8.The following is an example of continuous steel making process _________
  • LD
  • LD-AC
  • BISRA
  • AJAX
Answer: C
9.The following is an example of bottom blown steel making process ________
  • AJAX
  • Tandem
  • Q-BOP
  • Rotor
Answer: C
10.Regenerators are used in ________ furnaces.
  • LD
  • EAF
  • SIP
  • OHF
Answer: D
11.In WORCRA process the hot metal and the slag flow in _________ direction.
Answer: Opposite
12.In basic Bessemer process phosphorus is removed in the ___________ period.
Answer: After blow
13.Making the lance more steep in the Kaldo process favours faster _________
Answer: Carbon
14.In LD-AC process a part of the lime is passed through __________ to hasten removal of phosphorus.
Answer: Lance
15.The V -ratio of slags is represented by the formula _______
Answer: (% CaO/ %SiO2)
16.The oxidising power of slags is expressed as activity of ____________ in the slags.
Answer: FeO/iron oxide
17.Fe-Si is used as a _________ in steel making process.
Answer: Deoxidiser
18.P1roduction rate increases when campaign time is _________
Answer: More/ longer
19.Kaldo vessel rotates at a maximum speed of __________ rpm.
Answer: 30
20.Compound acceleration and compound deaccleration occurs in _________ process.
Answer: LD