MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Metallurgy knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In which of the following process, the friction between the billet and the die wall is minimum? |
| A. | Direct extrusion |
| B. | Impact extrusion |
| C. | Hydrostatic extrusion |
| D. | Tube drawing |
| Answer» D. Tube drawing | |
| 2. |
The Ugine-Sejournet process is associated with which of the following metal working process? |
| A. | Forging |
| B. | Rolling |
| C. | Extrusion |
| D. | Sheet metal forming |
| Answer» D. Sheet metal forming | |
| 3. |
Find the extrusion pressure for the metal having extrusion constant 5*109. The initial and final cross-sectional area is 50 mm2 and 10 mm2? |
| A. | 402 kN |
| B. | 300 kN |
| C. | 250 kN |
| D. | 4864 kN |
| Answer» B. 300 kN | |
| 4. |
If R is the reduction ratio and r is a fractional reduction in area, then the relationship between R & r will be given as __________ |
| A. | R=r |
| B. | R=1-r |
| C. | R=1/(1-r) |
| D. | R=1/r |
| Answer» D. R=1/r | |
| 5. |
The extrusion ratio for hot extrusion is much more than the extrusion ratio for cold extrusion. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
Decreasing the die angle __________ the homogeneity of deformation and __________ the extrusion pressure. |
| A. | increases, lowers |
| B. | decreases, lowers |
| C. | decreases, increases |
| D. | increases, increases |
| Answer» B. decreases, lowers | |
| 7. |
For a metal which is prone to hot shortness like aluminium and copper, the extrusion speed has to be _______ |
| A. | high |
| B. | low |
| C. | moderate |
| D. | doesn t matter |
| Answer» C. moderate | |