MCQOPTIONS
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MCQOPTIONS
This section includes 10 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. |
A steel bar of the initial diameter of 20 mm is extruded with extrusion ratio of 8. Find the final diameter of the bar? |
| A. | 10 mm |
| B. | 7 mm |
| C. | 15 mm |
| D. | 100 mm |
| Answer» C. 15 mm | |
| 2. |
A steel bar of the initial cross-section area of 200 mm2 is extruded with extrusion ratio of 8. Find the final cross-sectional area of the bar? |
| A. | 100 mm2 |
| B. | 25 mm2 |
| C. | 75 mm2 |
| D. | 1000 mm2 |
| Answer» C. 75 mm2 | |
| 3. |
Which of the following type of die gives the best surface finish after processing? |
| A. | Continuous die |
| B. | Complex die |
| C. | Conical die |
| D. | Parabolic die |
| Answer» E. | |
| 4. |
If the extrusion ratio of the material used is increased by two times, the required extrusion pressure _____________ |
| A. | increases by four times |
| B. | reduces by half |
| C. | increases by two times |
| D. | decreases by four times |
| Answer» D. decreases by four times | |
| 5. |
The hardness of the die material should always be _________ the workpiece used for processing. |
| A. | greater than |
| B. | lesser than |
| C. | equal to |
| D. | no relation |
| Answer» B. lesser than | |
| 6. |
The drawn thin wire is heat-treated to produce fine pearlite grain structure so that optimum strength and ductility can be obtained. This process of heat treatment is known as __________ |
| A. | carburising |
| B. | patenting |
| C. | bucking |
| D. | trimming |
| Answer» C. bucking | |
| 7. |
The Mannesmann process is used to make __________ |
| A. | thin wire |
| B. | plates |
| C. | seamless pipe |
| D. | coins |
| Answer» D. coins | |
| 8. |
The Mannesmann process is related with ___________ |
| A. | deep drawing |
| B. | forging |
| C. | rolling |
| D. | extrusion |
| Answer» E. | |
| 9. |
The cracking occurring during the hydrostatic extrusion at low temperature is known as the ______ |
| A. | crater effect |
| B. | chevron effect |
| C. | bamboo effect |
| D. | earing defect |
| Answer» D. earing defect | |
| 10. |
The maximum possible reduction in the cross-section area of the wire in a single pass of cable in case of ideal plastic material is equal to ________ |
| A. | 50% |
| B. | 63% |
| C. | 74% |
| D. | 68% |
| Answer» C. 74% | |