MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Manufacturing Processes knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The reasons for case hardening is to develop compressive residual stress. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
The main purpose of this stage is to harden the case consisting of austenite and globules of un dissolved carbide. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
Which of the following is most commonly used as carburizing gas? |
| A. | CH<sub>4</sub> |
| B. | CO |
| C. | N<sub>2</sub> |
| D. | C<sub>2</sub>H<sub>2</sub> |
| Answer» B. CO | |
| 4. |
A major limitation of pack carburizing is poor control over_____ |
| A. | temperature |
| B. | ductility |
| C. | hardness |
| D. | strength |
| Answer» B. ductility | |
| 5. |
The hardness of steel depends only on the ______ |
| A. | carbon content |
| B. | temperature |
| C. | yield strength |
| D. | tensile strength |
| Answer» B. temperature | |
| 6. |
Which of following is not the feature of induction hardening? |
| A. | Heat the surface to a temperature above an austenitic region |
| B. | Good surface finish |
| C. | Fast heating & short hold time |
| D. | Applicable to carbon steels having (0.8 1% C) |
| Answer» E. | |
| 7. |
During induction hardening, the microstructure of the surface gets transformed into _____ |
| A. | austenite |
| B. | perlite |
| C. | bainite |
| D. | martensite |
| Answer» E. | |
| 8. |
Induction hardening is used for _____ |
| A. | steels |
| B. | aluminium alloys |
| C. | copper alloys |
| D. | zinc alloys |
| Answer» B. aluminium alloys | |
| 9. |
Which of the following is the most commonly used coating materials for hard facing? |
| A. | Mixture of chromium carbide and cobalt |
| B. | Mixture of calcium nitrate and iron carbide |
| C. | Mixture of copper oxide and zinc oxide |
| D. | Mixture of boron carbide and vanadium pentoxide |
| Answer» B. Mixture of calcium nitrate and iron carbide | |
| 10. |
Which of the following is not the outcome of hard facing? |
| A. | Improved resistance to particle erosion |
| B. | Improved resistance to abrasion |
| C. | Improved resistance to fretting |
| D. | Improved resistance to plastic deformation |
| Answer» E. | |
| 11. |
Which of the following is not subjected to shot peening? |
| A. | Landing gears of an aircraft |
| B. | Automotive gears |
| C. | Shafts |
| D. | Coil springs |
| Answer» D. Coil springs | |
| 12. |
Shot peening technique is applicable to all metals and alloys that are prone to _____ |
| A. | plastic deformation |
| B. | brittle failure |
| C. | fatigue failure |
| D. | ductile deformation |
| Answer» B. brittle failure | |
| 13. |
How many surface hardening methods are there which are commonly used? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» D. 5 | |
| 14. |
Which of the following is not the purpose of the surface hardening? |
| A. | To improve wear resistance |
| B. | To increase fatigue life |
| C. | Prevention from cracking |
| D. | To improve ductility |
| Answer» E. | |
| 15. |
How many types of hardening processes are commonly used? |
| A. | 3 |
| B. | 5 |
| C. | 6 |
| D. | 7 |
| Answer» C. 6 | |