Iron Making In Metallurgy — Part 2 MCQs with Explanations

is used as fuel for other plants is the correct answer to “Blast furnace gas”. This question is standard in competitive examination syllabi for Iron Making In Metallurgy.

1900 is the correct answer to “The gas temperature at the tuyere's level is about . . . . . . . . degree centigrade.”. This question is standard in competitive examination syllabi for Iron Making In Metallurgy.

Wustite is the correct answer to “The chemical reserve zone in the blast furnace contains mainly of”. This question is standard in competitive examination syllabi for Iron Making In Metallurgy.

increases direct reduction and increases silicon content in the hot metal is the correct answer to “High top pressure in the iron blast furnace”. This question is standard in competitive examination syllabi for Iron Making In Metallurgy.

3.5 - 4.2 is the correct answer to “The carbon percentage of pig iron is”. This question is standard in competitive examination syllabi for Iron Making In Metallurgy.

700 is the correct answer to “In an ideal blast furnace, the input and output are as follows: Input: Ore, Pure Fe 2 O 3 , no gaunge : 1357kg/THM ∗ Coke, Pure C, no ash : 400 kg/THM Blast air, dry : O 2 : 293 kg/HTM, N 2 : 964 KG/THM Flux : nil Output : Hot metal : 5wt% C, rest iron Slag : nil Top gas : CO, CO 2 , N 2 ∗ THM refers ton of hot metal (liquid pig iron) ; Atomic weights: C-12, O-16, Fe-56 The amount of oxygen in CO & CO 2 leaving with the top gas is . . . . . . . . kg.”. This question is standard in competitive examination syllabi for Iron Making In Metallurgy.

Lime is the correct answer to “To form basic slag, which of the following is added”. This question is standard in competitive examination syllabi for Iron Making In Metallurgy.

iron is the correct answer to “The chemical reserve zone in the iron blast furnace consists mainly of”. This question is standard in competitive examination syllabi for Iron Making In Metallurgy.

refining is the correct answer to “The active metal mixer also does . . . . . . . .”. This question is standard in competitive examination syllabi for Iron Making In Metallurgy.

agglomerated charge is the correct answer to “The permeability of burden in an iron making blast furnace can be improved by using”. This question is standard in competitive examination syllabi for Iron Making In Metallurgy.

>1 is the correct answer to “Basicity of super-fluxed sinter is . . . . . . . .”. This question is standard in competitive examination syllabi for Iron Making In Metallurgy.

1425 is the correct answer to “An iron blast furnace produces hot metal containing 95% Fe. The iron ore charged into the furnace contains 95% Fe 2 O 3 and the rest is gangue. Assume that all the iron in the ore goes to hot metal. The amount of iron ore (in kg) required for producing 1000 kg of hot metal is (Atomic weight of Fe = 56 g mol -1 and that of Fe 2 O 3 = 160 g mol -1 )”. This question is standard in competitive examination syllabi for Iron Making In Metallurgy.

has better reducibility than ore is the correct answer to “In an iron blast furnace, the sinter is added in preference to iron ore lumps because, sinter”. This question is standard in competitive examination syllabi for Iron Making In Metallurgy.

P-3, Q-2, R-4, S-1 is the correct answer to “Match the following blast furnace reactions with the regions where they take place. (Note that the underlined elements are present in the hot metal and the species in the parenthesis belong to slag phase). P. Fe 3 O 4 + CO = 3FeO + CO 2 1. Hearth Q. C + 0.5 O 2 + CO 2. Tuyer R. y . Fe + c = Fe y c 3. Stack S. C + (CaO) + S = (CaS) + CO 4. Bosh”. This question is standard in competitive examination syllabi for Iron Making In Metallurgy.

3 is the correct answer to “Solid raw materials required to produce a ton of pig iron is about . . . . . . . . tons”. This question is standard in competitive examination syllabi for Iron Making In Metallurgy.

50 - 60% indirect reduction is the correct answer to “For efficient performance of a blast furnace, the extent of reduction of lustite should be”. This question is standard in competitive examination syllabi for Iron Making In Metallurgy.

Aston process is the correct answer to “Desulfurisation of molten pig iron outside the blast furnace is carried out by the”. This question is standard in competitive examination syllabi for Iron Making In Metallurgy.

P-3, Q-1, R-2, S-4 is the correct answer to “Match the processes for alternate methods of producing iron in Group 1 with the type of furnaces listed in Group 2 . Group 1 Group 2 P. MIDREX 1. Rotary kiln Q. SL/RN 2. Retort R. Echevarria 3. Shaft furnace S. FLOR 4. Fluidised bed”. This question is standard in competitive examination syllabi for Iron Making In Metallurgy.

>85% is the correct answer to “The fixed carbon content of coke used in Blast furnace is”. This question is standard in competitive examination syllabi for Iron Making In Metallurgy.

local failure of lining is the correct answer to “Hot spot develops due to . . . . . . . .”. This question is standard in competitive examination syllabi for Iron Making In Metallurgy.

recycles a part of exit gas is the correct answer to “The Midrex process of iron making”. This question is standard in competitive examination syllabi for Iron Making In Metallurgy.

lower temperature and higher basicity is the correct answer to “The important factors for producing low silicon pig iron in a blast furnace are”. This question is standard in competitive examination syllabi for Iron Making In Metallurgy.

350 to 500 is the correct answer to “Slag rate in indian blast furnaces is in the range of . . . . . . . . kg/ton of pig iron”. This question is standard in competitive examination syllabi for Iron Making In Metallurgy.