Steel Making In Metallurgy — Part 1 MCQs with Explanations

The basicity of slag is maintained at around unity is the correct answer to “Identify the incorrect statement with reference to L.D. steel making”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

FeO, because O2- ions are oxidising to the elements is the correct answer to “The oxidising power of a steel making slag is dependent on the concentration of”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

Clean steel is the correct answer to “Inclusion free steel are known as”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

a is true and r is also true, and r is the reason for a is the correct answer to “Determine the correctness or otherwise of the following Assertion(a) and Reason(r) : Assertion (a): Deoxidation and decarburisation of liquid steel are done by vacuum treatment process. Reason (r): Decreased partial pressure of CO(g) promotes deoxidation and decarburisation.”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

All are correct is the correct answer to “What are the basic properties of Cr-Mn Grades stainless steels”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

P-2, Q-1, R-3, S-4 is the correct answer to “Match the following Group 1 Group 2 P. Aluminium addition 1. Homogenization Q. Argon stirring 2. Deoxidation R. Oxygen injection 3. Decarbunsation S. Calcium carbide injection 4. Desulfurisation”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

18% chromium and 8% nickel is the correct answer to “18/8 stainless steel consists of”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

manganese, silicon, aluminium is the correct answer to “If a steel has a to be deoxidised with silicon, manganese and aluminium in the ladle, the preferred sequence of addition is”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

water cooled copper is the correct answer to “In continuous casting of liquid steel, the mould is made of”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

all are correct is the correct answer to “What are the uses of medium carbon, low Cr-Mo steels”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

It is the ratio of basic oxide to acidic oxide is the correct answer to “What do you mean by basicity”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

high temperature, low viscosity, low FeO content of salg is the correct answer to “Necessary condition for removal of sulphur from liquid steel are”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

1865 is the correct answer to “In which year the open-hearth furnace is developed”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

When P content is more than 1.5% is the correct answer to “Thomas steel making is used when”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

Medium carbon steel is the correct answer to “The steel which contains carbon percentage up to 0.35 - 0.65% is called”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

Q, R is the correct answer to “Manganese recovery insteelmaking is aided by P. Oxidising slag Q. Reducing slag R. High temperature S. Low temperature T. Acidic slag”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

10 : 1 is the correct answer to “When quenched in water, the structured produced is austenitic provided manganese to carbon ratio in the given Hadfield steel is”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

duplex is the correct answer to “Stainless steel having a similar carbon content becomes least susceptible to intergranular corrosion if it is”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

Prevents the oxidation of expensive nickel in the stainless steel is the correct answer to “In AOD process of stainless steel making, a mixture of argon and oxygen gas in blown through the bottom because the argon gas”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

400 - 550°C is the correct answer to “475°C embrittlement phenomenon is observed when stainless steels are heated into the range of”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

Swedish iron is the correct answer to “Acidic iron is also known as”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

All are correct is the correct answer to “What are the applications of 321 Austenitic stainless steel”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

2 to 3.5 is the correct answer to “Slag basicity of LD slag is-”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

convergent-divergent is the correct answer to “The nozzle used in the lance of LD steel making process is”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

low current high voltage is the correct answer to “Modern electric arc furnace uses”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

Higher temperature is the correct answer to “Which one of the following factors is not desirable for effective phosphorus removal in BOF steel making process”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

Calcium wire injection is the correct answer to “Which one of the following processes is performed for inclusion modification in ladle metallurgy of steel making”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

0.03 is the correct answer to “In maraging steels, carbon is present as an impurity and is generally kept below . . . . . . . . percent.”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

Ni is the correct answer to “Which of the following elements is used as austenite stabilizer in 18 - 8 stainless stee”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

0.0066 is the correct answer to “Liquid steel (300 metric tons) initially containing 0.03 mass% sulfur, is desulphurised with calcium (1000kg) according to the reaction, Ca + [S] = Ca S. The slag (1 metric ton) lying on top of metal contains (in mass%) 50% CaO, 25% SiO 2 and the rest is Al 2 O 3 . Only 10 mass% of the CaO injected reacts with the sulfur and the rest escapes as gas into the atmosphere. What will be the final sulfur content, in mass% in liquid steel”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

All of these is the correct answer to “What are the properties of synthetic slag”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

EAF is the correct answer to “Stainless steel is most commonly produced using the . . . . . . . . process.”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

Silicon is the correct answer to “During LD blow in steel making the impurity that gets removed first is”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

2.6 × 10-3 is the correct answer to “A steel sample which has been deoxidised with Fe - Mn at 1600°C contains 0.51 wt%Mn. The equilibrium constant for dissolution of MnO in steel with 1 wt% standard state is 0.051. the residual oxygen level in the sample is . . . . . . . . wt%”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

all of these is the correct answer to “Zinc in steel”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

20 minutes is the correct answer to “What is the refining period for LD convertor”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

improve phosphorous distribution ratio is the correct answer to “In steel making, the addition of bauxite is done to”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

both silicon and carbon should be low is the correct answer to “In a good rimming steel”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

Martensitic stainless steel is the correct answer to “Stainless steel used for making sharp edge components (like knife, surgical items etc.) is”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.

2630 is the correct answer to “Ladle deoxidation of liquid steel is done at 1600°C by adding ferro-aluminium. By assuming Stokes law behaviour, time (in s) required for alumina particles of 50 μm diameter to float to the surface from a depth of 2 m would be [Given: density of steel = 7000 kg/m 3 , density of alumina = 3650 kg/m 3 , viscosity of steel = 6 × 10 -3 kg/m/s]”. This question is standard in competitive examination syllabi for Steel Making In Metallurgy.