Mechanical Metallurgy MCQ Questions and Answers

11

Match the product in Group 1 and the main manufacturing process in Group 2.

Group 1	Group 2
P. Cement kilns	1. Rolling and welding
Q. Gas pipelines	2. Casting and welding
R. Cycle rims	3. Forging and welding
S. Seamless pipe	4. Extrusion and welding
	5. Forging and extrusion

A) P-1, Q-2, R-3, S-5 B) P-2, Q-1, R-4, S-5 C) P-2, Q-5, R-4, S-1 D) P-2, Q-4, R-5, S-1

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Answer & Solution

Answer: Option B

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12

Fatigue strength of steel can be'increased by

A) increasing tensile surface residual stresses B) introducing hydrogen in steel C) increasing the grain size D) increasing the specimen size E) increasing compressive surface residual stresses

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Answer & Solution

Answer: Option E

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13

Which of the following metal working operations can be categorized as an indirect compression process?

A) Forging B) Wire drawing C) Extrusion D) Stretch forming

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Answer & Solution

Answer: Option C

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14

Classification of metal forming processes into hot and cold working is based on the following parameter.

A) Stacking fault energy B) Recrystallisation temperature C) solidus temperature D) transformation temperature

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Answer & Solution

Answer: Option B

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15

As the % reduction increases, the flow stress during hot isothermal forging of a metal

A) increases linearly B) decreases exponentially C) decreases linearly D) remains almost constant

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Answer & Solution

Answer: Option B

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16

Often earing defects are found during deep drawing operation, because the

A) surface finish of the sheet is poor B) sheet material has been given substantial spring back C) starting sheet has planer anisotropy due to its texture D) starting sheet has normal anisotropy due to its texture

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Answer & Solution

Answer: Option C

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17

For the occurence of "bite" in rolling, the following condition should be satisfied.

A) The co-efficient of friction should exceed the tangent of the contact angle B) The roll separating force should reach a maximum value C) The friction co-efficient should be zero D) The contact length should be minimum

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Answer & Solution

Answer: Option A

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18

For ingot breakdown by hot rolling, the rolls are generally grooved paralled to the roll axis in order to
P. increase the arigle of bite
Q. decrease the rolling load
R. achieve larger reduction
S. decrease roll flattening

A) P, Q B) Q, R C) P, R D) Q, S

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Answer & Solution

Answer: Option D

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19

Identify the statement that precisely describes the principle of hot working of metals and alloys.

A) It is mechanical deformation carried out above the temperature of recrystallisation B) It is mechanical deformation carried out above the room temperature C) It is mechanical deformation carried out above the annealing temperature D) It is mechanical deformation carried out just below the melting temperature

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Answer & Solution

Answer: Option A

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20

The co-efficient of friction alters by 5 times when a slab is hot rolled instead of cold rolling in a specific rolling mill. The maximum reduction in the thickness of the slab will increase by a factor of

A) 25 B) 5 C) 0.04 D) 1

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Answer & Solution

Answer: Option A

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Mechanical Metallurgy MCQ Questions and Answers | Metallurgical Engineering