MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 53 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 following statement is true or false about Chemical milling.'CHM can also affect mechanical properties, if they differ from surface layer to base metal.' |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
What is the value of surface roughness, when special conditions are applied? |
| A. | 0.001 - 0.025 µm |
| B. | 0.025 - 0.05 µm |
| C. | 0.05 - 0.075 µm |
| D. | 0.075 - 0.1 µm |
| Answer» C. 0.05 - 0.075 µm | |
| 3. |
What is the value of surface roughness, which is generally obtained using Chemical milling? |
| A. | 0.01 - 0.08 µm |
| B. | 0.1 - 0.8 µm |
| C. | 1 - 8 µm |
| D. | 10 - 80 µm |
| Answer» C. 1 - 8 µm | |
| 4. |
Which of the following can be easily removed using Chemical milling process? |
| A. | TiO2 layer |
| B. | Decarburized layer |
| C. | Recast structure |
| D. | All of the mentioned |
| Answer» E. | |
| 5. |
State whether following statement is true or false regarding the advantages of CHM.'As there are no stresses induced, machining of delicate parts is possible.' |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
For harder materials, which of the following etching rates are obtained? |
| A. | Very low |
| B. | Low |
| C. | Medium |
| D. | High |
| Answer» E. | |
| 7. |
State whether following statement is true or false regarding surface finish in CHM.'The surfaces, which are machined using Chemical milling, will have regular lay pattern.' |
| A. | True |
| B. | False |
| Answer» C. | |
| 8. |
State whether following statement is true or false about etching rates.'As the etching rate increases, low surface roughness values occur.' |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
Which of the following materials have the highest machining rate and best surface quality? |
| A. | Rolled metal sheets |
| B. | Thick metal plates |
| C. | Polymeric plates |
| D. | Plastic sheets |
| Answer» B. Thick metal plates | |
| 10. |
State whether following statement is true or false regarding MRR.'The rate of material removal, does not depend on uniformity of the solution temperature.' |
| A. | True |
| B. | False |
| Answer» C. | |
| 11. |
For softer materials, which type of etching rates are obtained? |
| A. | Very low |
| B. | Low |
| C. | Medium |
| D. | High |
| Answer» C. Medium | |
| 12. |
State whether the following statement is true or false about Chemical milling.'Maskants, applied on work pieces, are not responsible for CHM process.' |
| A. | True |
| B. | False |
| Answer» C. | |
| 13. |
Which of the tolerance values are obtained, when we use silk-screen resist method for maskant? |
| A. | ± 0.013 mm |
| B. | ± 0.045 mm |
| C. | ± 0.077 mm |
| D. | ± 0.179 mm |
| Answer» D. ± 0.179 mm | |
| 14. |
State whether the following statement is true or false about etchants.'Etchants are used for controlling H2 absorption in case of Ti alloys.' |
| A. | True |
| B. | False |
| Answer» B. False | |
| 15. |
Which of the following, are the main uses of etchants applied in Chemical milling? |
| A. | Good surface finish |
| B. | Uniform material removal |
| C. | Control intergranular attack |
| D. | All of the mentioned |
| Answer» E. | |
| 16. |
Which of the tolerance values are obtained, when we use photo resist method for maskant application? |
| A. | ± 0.013 mm |
| B. | ± 0.045 mm |
| C. | ± 0.077 mm |
| D. | ± 0.179 mm |
| Answer» B. ± 0.045 mm | |
| 17. |
Of the following, which ratio defines the etch factor? |
| A. | Etching depth to undercut |
| B. | Undercut to etching depth |
| C. | Undercut to mask area |
| D. | Mask area to undercut |
| Answer» C. Undercut to mask area | |
| 18. |
In Chemical milling, excessive flow of chemical reagent results in which of the following defects? |
| A. | Channellings |
| B. | Grooves |
| C. | Ridges |
| D. | All of the mentioned |
| Answer» E. | |
| 19. |
State which of the following statement is true or false regarding Chemical milling.'Maskants are generally used in CHM, to protect the work piece from the etching chemical agent.' |
| A. | True |
| B. | False |
| Answer» B. False | |
| 20. |
State whether the following statement about Chemical milling is true or false.'At higher temperatures, faster etching rates occur in Chemical milling.' |
| A. | True |
| B. | False |
| Answer» B. False | |
| 21. |
State whether following statement is true or false regarding maskants.'After etching, maskants should be removed easily and inexpensively.' |
| A. | True |
| B. | False |
| Answer» B. False | |
| 22. |
State whether following statement is true or false regarding advantages of PCM.'Patterns can be reproduced easily.' |
| A. | True |
| B. | False |
| Answer» B. False | |
| 23. |
State whether following statement is true or false regarding EP process.'Electropolishing is same as electro plating.' |
| A. | True |
| B. | False |
| Answer» C. | |
| 24. |
State whether following statement is true or false regarding process parameters of EP.'In EP, process parameters have a direct impact on surface quality and productivity of process.' |
| A. | True |
| B. | False |
| Answer» B. False | |
| 25. |
State whether following statement is true or false regarding process parameters of EP.'In EP, high current densities are used for anodic dissolution.' |
| A. | True |
| B. | False |
| Answer» C. | |
| 26. |
What is the electrolytic solution's temperature when stainless steel is machined? |
| A. | 50o C |
| B. | 80o C |
| C. | 120o C |
| D. | 150o C |
| Answer» C. 120o C | |
| 27. |
State whether following statement is true or false about applications of EP.'In EP, cast items do not maintain the texture of sand mold.' |
| A. | True |
| B. | False |
| Answer» C. | |
| 28. |
State whether following statement is true or false regarding Photochemical milling.'Unlike that of CHM, PCM can also be used to create parts.' |
| A. | True |
| B. | False |
| Answer» B. False | |
| 29. |
State whether following statement is true or false regarding PCM.'In PCM, etching depth does not depend on the time, a component is immersed in the chemical solution.' |
| A. | True |
| B. | False |
| Answer» C. | |
| 30. |
Which of the following processes does not come under Chemical machining processes? |
| A. | Chemical milling |
| B. | Photo forming |
| C. | Photo chemical filling |
| D. | Photo chemical blanking |
| Answer» C. Photo chemical filling | |
| 31. |
State whether following statement is true or false regarding the applications of CHM.'Removal of thin surfaces, prior to inspection, is done for detection of hidden defects.' |
| A. | True |
| B. | False |
| Answer» B. False | |
| 32. |
What is the cost per unit for low production volumes of complex designs using PCM? |
| A. | Low |
| B. | Medium |
| C. | High |
| D. | None of the mentioned |
| Answer» B. Medium | |
| 33. |
Which of the following factors can change the parameters of etch such as depth, size of hole etc.? |
| A. | Time of etch |
| B. | Type of etchant |
| C. | All of the mentioned |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 34. |
State whether following statement is true or false regarding advantages of PCM.'In PCM, lead times are large, when compared to that required for hard tooling using traditional means.' |
| A. | True |
| B. | False |
| Answer» C. | |
| 35. |
State whether following statement is true or false regarding the advantages?'Capital cost of equipment, for machining large components, is relatively high.' |
| A. | True |
| B. | False |
| Answer» C. | |
| 36. |
State whether following statement is true or false about advantages.'Extensive web areas and decorative finishes are not possible using CHM.' |
| A. | True |
| B. | False |
| Answer» C. | |
| 37. |
What are the values of scrap rates obtained in Chemical milling? |
| A. | 0.01 |
| B. | 0.03 |
| C. | 0.05 |
| D. | 0.07 |
| Answer» C. 0.05 | |
| 38. |
After etching is done, what is the next step in Photochemical milling process? |
| A. | Finishing |
| B. | Rinsing and drying |
| C. | Removal of protective layer |
| D. | None of the mentioned |
| Answer» C. Removal of protective layer | |
| 39. |
State whether following statement is true or false about applications of PCM.'Using PCM, very high tempered materials are machined easily.' |
| A. | True |
| B. | False |
| Answer» B. False | |
| 40. |
How are the protective layer coatings on the parts are removed? |
| A. | Use of chemicals |
| B. | Mechanical techniques with chemicals |
| C. | None of the mentioned |
| D. | All of the mentioned |
| Answer» E. | |
| 41. |
Which of the following is not a limitation of Chemical milling process? |
| A. | Steep tapers not practical |
| B. | Low scrap rates |
| C. | Less scribing accuracy |
| D. | Deep narrow cuts |
| Answer» C. Less scribing accuracy | |
| 42. |
Which of the following are the other limitations of Chemical milling process? |
| A. | Hydrogen pickup |
| B. | Intergranular attack |
| C. | Complex designs becoming expensive |
| D. | All of the mentioned |
| Answer» E. | |
| 43. |
State whether following statement regarding the limitations of CHM.'Welded areas etch, at a rate that is same as base metal.' |
| A. | True |
| B. | False |
| Answer» C. | |
| 44. |
Surfaces produced in Electropolishing process possess which of the qualities? |
| A. | Bright |
| B. | Clean |
| C. | Microscopically smooth |
| D. | All of the mentioned |
| Answer» E. | |
| 45. |
State whether following statement is true or false regarding EP.'Fine direction lines are left in EP, like that of abrasive polishing.' |
| A. | True |
| B. | False |
| Answer» C. | |
| 46. |
State whether following statement is true or false about EP process.'In EP, produced surface possess true crystalline structure without distortion.' |
| A. | True |
| B. | False |
| Answer» B. False | |
| 47. |
More anodic dissolution takes place at which part of the surface of the work piece? |
| A. | Peaks |
| B. | Valleys |
| C. | Troughs |
| D. | None of the mentioned |
| Answer» B. Valleys | |
| 48. |
Which of the following is a limitation of EP process? |
| A. | Rough scratches removal |
| B. | Scales removal |
| C. | Distortions removal |
| D. | Burr removal |
| Answer» B. Scales removal | |
| 49. |
Electropolishing cannot cover up which type of defects? |
| A. | Burrs on surfaces |
| B. | Scales and distortions |
| C. | Non-metallic inclusions |
| D. | Metallographic examination |
| Answer» D. Metallographic examination | |
| 50. |
State whether following statement is true or false regarding the limitations of EP?'In EP, base metal condition does not affect the process.' |
| A. | True |
| B. | False |
| Answer» C. | |