Mechanical Metallurgy MCQ Questions and Answers

1

In a tensile test of ductile material, necking starts at

A) lower yield stress B) upper yield stress C) ultimate tensile strength D) just before fracture

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

2

A metallic sheet 1 m wide and 10 mm thick is to be rolled under a front tension force of 100 KN. A specimen from the sheet, tested under tension, shows a yield stress of 100 MPa. Assume plain strain condition during rolling and ignore the friction. If yielding is assumed to start at a roll pressure of σ3 MPa, then the stress in the width direction (where strain is zero) is

A) $$2 + \frac{{\sigma 3}}{2}$$ B) $$4 + \frac{{\sigma 3}}{5}$$ C) $$5 + \frac{{\sigma 3}}{2}$$ D) $$5 + \frac{{\sigma 3}}{3}$$

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

3

Match the forming methods in Group 1 with the defects in Group 2.

Group 1	Group 2
P. Extrusion	1. Flash cracking
Q. Closed die forging	2. Fir-tree cracking
R. Rolling	3. Alligatoring
	4. Earing

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

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

4

The maximum axial compression stress during cold upsetting of a cylindrical rod of radius, 'r', occurs at

A) the outer edges of the rod B) $$\frac{r}{3}$$ from the centre C) $$\frac{r}{2}$$ from the centre D) the centre

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

5

The defects that are not observed in extruded products are
P. Chevron cracking
Q. Fold
R. Piping
S. Surface cracking
T. Alligatoring

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

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

6

Which of the following metal forming techniques is used to produce soft drink cans from aluminium sheets?

A) Rolling B) Forging C) Deep drawing D) Extrusion

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

7

Match the defects listed in Group I with the corresponding manufacturing process listed in Group II.

Group I	Group II
P. Orange-peel effect	1. Extrusion
Q. Chevron cracking	2. Deep drawing
R. Flash	3. Arc welding
S. Undercut	4. Forging

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

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

8

Railway tracks are typically manufactured using

A) Forging B) Extrusion C) Deep Drawing D) Rolling

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

9

The rolling process can not be used to produce

A) plates B) rods C) tubes D) wires

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

10

The yield point phenomenon observed in annealed low carbon steels is due to the presence of

A) silicon B) chromium C) phosphorous D) carbon

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

Mechanical Metallurgy MCQ Questions and Answers | Metallurgical Engineering