MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Advanced Machining knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
State whether the following statement is true or false regarding the HAZ in EDM.“In EDM, post treatment to recover fatigue strength is not recommended.” |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
Which of the following processes can be used for restoration of fatigue properties? |
| A. | Low-stress grinding |
| B. | Chemical machining |
| C. | Reheat treatment |
| D. | All of the mentioned |
| Answer» E. | |
| 3. |
During finishing process through Electro discharge machining, what is the value thickness of layer formed? |
| A. | <0.075 mm |
| B. | <0.125 mm |
| C. | <0.500 mm |
| D. | <0.750 mm |
| Answer» B. <0.125 mm | |
| 4. |
During roughing process through Electro discharge machining, what is the thickness of layer formed? |
| A. | <0.075 mm |
| B. | <0.125 mm |
| C. | <0.500 mm |
| D. | <0.750 mm |
| Answer» C. <0.500 mm | |
| 5. |
The altered layers formed during the process of EDM consists of which of the following? |
| A. | Tempered layers |
| B. | Heat affected zones |
| C. | Intergranular precipitates |
| D. | All of the mentioned |
| Answer» E. | |
| 6. |
What happens to the fatigue strength of alloys if altered surfaces are produced in Electro discharge machining? |
| A. | Increases |
| B. | Reduces |
| C. | Enhances |
| D. | Improves |
| Answer» C. Enhances | |
| 7. |
In EDM, choosing electrodes that produce which type of machining reduces the annealing effect? |
| A. | Stable |
| B. | Unstable |
| C. | Uneven |
| D. | All of the mentioned |
| Answer» B. Unstable | |
| 8. |
What are the values of thickness of annealed surface obtained while machining using EDM? |
| A. | 1 to 25 µm |
| B. | 50 to 200 µm |
| C. | 200 to 500 µm |
| D. | 500 to 1000 µm |
| Answer» C. 200 to 500 µm | |
| 9. |
The depth of the annealed surface is __________ to the amount of power used in machining operation. |
| A. | Directly proportional |
| B. | Inversely proportional |
| C. | Exponential |
| D. | All of the mentioned |
| Answer» B. Inversely proportional | |
| 10. |
In Electro discharge machining, some annealing of the work piece can be expected __________ the machined surface. |
| A. | On |
| B. | Just below |
| C. | Above |
| D. | At bottom |
| Answer» C. Above | |
| 11. |
What are the values of thickness of recast layers in Electro discharge machining? |
| A. | 0.001 to 0.025 µm |
| B. | 0.01 to 0.25 µm |
| C. | 1 to 25 µm |
| D. | 10 to 250 µm |
| Answer» D. 10 to 250 µm | |
| 12. |
What is the value of thickness of recast layer obtained when power of 5 µJ is given? |
| A. | 1 µm |
| B. | 3 µm |
| C. | 5 µm |
| D. | 7 µm |
| Answer» B. 3 µm | |
| 13. |
What are the values of temperatures obtained in Electro discharge machining? |
| A. | 1000 to 2000 oC |
| B. | 2000 to 4000 oC |
| C. | 4000 to 8000 oC |
| D. | 8000 to 12000 oC |
| Answer» E. | |
| 14. |
THE_ALTERED_LAYERS_FORMED_DURING_THE_PROCESS_OF_EDM_CONSISTS_OF_WHICH_OF_THE_FOLLOWING??$ |
| A. | Tempered layers |
| B. | Heat affected zones |
| C. | Intergranular precipitates |
| D. | All of the mentioned |
| Answer» E. | |