Steel Making in Metallurgy MCQ Questions and Answers | Metallurgical Engineering Page-8 section-1

71.
What are the applications of 436L ferritic stainless steel?

A. Visible parts of exhaust systems

B. Automotive trim and outdoor panels

C. Communication-system shelter

D. All are correct

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72.
In a steel pouring ladle, the distance between the top of the ladle and the surface of the contents of the ladle is called

A. free board

B. Jet force number

C. Tapping

D. None of these

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73.
The purpose of injection of calcium into liquid steel is to
P. replace Al₂O₃ inclusions by CaO inclusions
Q. modify Al₂O₃ inclusions into calcium aluminate inclusions
R. reduce sulfur content of steel
S. reduce nitrogen content of steel

A. P, Q

B. P, R

C. Q, R

D. Q, S

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74.
What are the casting defects?

A. Ingotism

B. Piping

C. Segregation

D. all of these

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75.
How much time is required for refining steel in acid Bessemer process?

A. 30 minutes

B. 40 minutes

C. 20 minutes

D. 60 minutes

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76.
In continuous casting of steel, the mould is subjected to vertical oscillations in order to

A. alloy easy flotation of inclusion

B. ensure good casting homogeneity

C. increase the heat transfer rate from the steel to the mould

D. prevent the skin sticking to the mould

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77.
Reducing condition is carried out in electric arc furnace, with slag

A. free from P₂O₅

B. free from P₂O₅

C. free from FeO

D. None of these

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78.
Identify the correct statement about man-ganese in steels from the following:

A. Itdecreases hardenability

B. It makes the steel succeptible to hot-shortness

C. It is a strong austenite stabiliser

D. It decreases hardness of martensite

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79.
Purpose of alloying of steels are

A. Increase hardenability

B. Improve corrosion resistance

C. Increase hardenability

D. All are correct

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80.
VOD process is preferred over AOD process for making extra low carbon stainless steel, because

A. pco can be lowered to a much lower level in the VOD than in the AOD

B. AOD does not have adequate stirring

C. free board needed for such operation is not available in the AOD

D. AOD refractory is not stable in contact with extra low carbon steel

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Steel Making in Metallurgy MCQ Questions and Answers | Metallurgical Engineering

71. What are the applications of 436L ferritic stainless steel?

Answer & Solution

72. In a steel pouring ladle, the distance between the top of the ladle and the surface of the contents of the ladle is called

Answer & Solution

73. The purpose of injection of calcium into liquid steel is to P. replace Al2O3 inclusions by CaO inclusions Q. modify Al2O3 inclusions into calcium aluminate inclusions R. reduce sulfur content of steel S. reduce nitrogen content of steel

Answer & Solution

74. What are the casting defects?

Answer & Solution

75. How much time is required for refining steel in acid Bessemer process?

Answer & Solution

76. In continuous casting of steel, the mould is subjected to vertical oscillations in order to

Answer & Solution

77. Reducing condition is carried out in electric arc furnace, with slag

Answer & Solution

78. Identify the correct statement about man-ganese in steels from the following:

Answer & Solution

79. Purpose of alloying of steels are

Answer & Solution

80. VOD process is preferred over AOD process for making extra low carbon stainless steel, because

Answer & Solution

71.
What are the applications of 436L ferritic stainless steel?

72.
In a steel pouring ladle, the distance between the top of the ladle and the surface of the contents of the ladle is called

73.
The purpose of injection of calcium into liquid steel is to
P. replace Al₂O₃ inclusions by CaO inclusions
Q. modify Al₂O₃ inclusions into calcium aluminate inclusions
R. reduce sulfur content of steel
S. reduce nitrogen content of steel

74.
What are the casting defects?

75.
How much time is required for refining steel in acid Bessemer process?

76.
In continuous casting of steel, the mould is subjected to vertical oscillations in order to

77.
Reducing condition is carried out in electric arc furnace, with slag

78.
Identify the correct statement about man-ganese in steels from the following:

79.
Purpose of alloying of steels are

80.
VOD process is preferred over AOD process for making extra low carbon stainless steel, because