Steel Making in Metallurgy MCQ Questions and Answers

1

Identify the incorrect statement with reference to L.D. steel making

A) The temperature of L.D. furnace is maintained at around 1600°C B) The basicity of slag is maintained at around unity C) Dephosphorisation and decarburisation should proceed simultaneously D) High silicon hot metal may lead to sloping

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Answer & Solution

Answer: Option B

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2

The oxidising power of a steel making slag is dependent on the concentration of

A) CaO, because Ca²⁺ ions are oxidising to the elements B) CaO, because O^2- ions are oxidising to the elements C) FeO, because Fe²⁺ ions are oxidising to the elements D) FeO, because O^2- ions are oxidising to the elements

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Answer & Solution

Answer: Option D

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3

Inclusion free steel are known as

A) Plain carbon steel B) Clean steel C) Alloy steel D) None of these

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Answer & Solution

Answer: Option B

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4

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.

A) a is false but r is true B) a is true but r is false C) a is true and r is also true, but r is not the reason for a D) a is true and r is also true, and r is the reason for a

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Answer: Option D

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5

What are the basic properties of Cr-Mn Grades stainless steels

A) Higher strength B) Lesser corrosion resistance C) Poor machinability D) All are correct

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Answer & Solution

Answer: Option D

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6

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

A) P-2, Q-1, R-3, S-4 B) P-2, Q-1, R-4, S-3 C) P-4, Q-3, R-2, S-1 D) P-1, Q-2, R-3, S-4

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Answer & Solution

Answer: Option A

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7

18/8 stainless steel consists of

A) 18% nickel and 8% chromium B) 18% chromium and 8% nickel C) 18% nickel and 18% chromium D) 8% nickel and 8% chromium

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Answer & Solution

Answer: Option B

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8

If a steel has a to be deoxidised with silicon, manganese and aluminium in the ladle, the preferred sequence of addition is

A) Silicon, manganese, aluminium B) aluminium, manganese, silicon C) manganese, silicon, aluminium D) aluminium, silicon, maganese

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Answer & Solution

Answer: Option C

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9

In continuous casting of liquid steel, the mould is made of

A) water cooled steel B) water cooled copper C) refractory oxide D) silicon carbide

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Answer & Solution

Answer: Option B

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10

What are the uses of medium carbon, low Cr-Mo steels

A) axles B) shafts C) connecting rods D) all are correct

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Answer & Solution

Answer: Option D

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Steel Making in Metallurgy MCQ Questions and Answers | Metallurgical Engineering