MCQOPTIONS
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MCQOPTIONS
This section includes 382 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
State whether the following statement is true or false about Magnetic abrasive finishing. “Mirror finishing, removed burrs with lowering the accuracy of the shape are achieved by MAF.” |
| A. | true |
| B. | false |
| Answer» C. | |
| 2. |
State whether the following statement is true or false about Magnetic abrasive finishing. “Higher rates of material removal are obtained, with an increase in amplitude and frequency.” |
| A. | true |
| B. | false |
| Answer» B. false | |
| 3. |
State whether the following statement is true or false about magnetic abrasive finishing. “Increasing the magnetic flux density raises the rate of material removal in finishing.” |
| A. | true |
| B. | false |
| Answer» B. false | |
| 4. |
State whether the following statement is true or false about Magnetic abrasive finishing. “Vibratory motion that is axial, is introduced in the magnetic field by the oscillation of magnetic poles.” |
| A. | true |
| B. | false |
| Answer» B. false | |
| 5. |
State whether the following statement is true or false regarding the limitations of ECM. “In electrochemical machining, duplicating the tool is easier.” |
| A. | true |
| B. | false |
| Answer» C. | |
| 6. |
State whether the following statement is true or false regarding the limitations of ECM. “In ECM, cleaning and oiling of work piece need not be done after machining.” |
| A. | true |
| B. | false |
| Answer» C. | |
| 7. |
Compared to other processes, machining is done at voltages for high rates of material removal. |
| A. | low |
| B. | medium |
| C. | high |
| D. | very low |
| Answer» D. very low | |
| 8. |
ECM is used to the sharp edges produced after rough cuts. |
| A. | enhance |
| B. | dull |
| C. | improve |
| D. | none of the mentioned |
| Answer» C. improve | |
| 9. |
The cost of additional control hardware remain a fraction of total machining cost. |
| A. | small |
| B. | large |
| C. | equal |
| D. | none of the mentioned |
| Answer» B. large | |
| 10. |
Machining conditions leading to high accuracy are associated with surface roughness and productivity. |
| A. | greater, greater |
| B. | smaller, greater |
| C. | greater, smaller |
| D. | smaller, smaller |
| Answer» C. greater, smaller | |
| 11. |
What is the value of the overcut that is obtained using ECM? |
| A. | 0.3 mm |
| B. | 0.5 mm |
| C. | 0.7 mm |
| D. | 0.9 mm |
| Answer» C. 0.7 mm | |
| 12. |
It is difficult to machine inner radii smaller than and outer radii less than |
| A. | 0.1 mm, 0.2 mm |
| B. | 0.5 mm, 0.8 mm |
| C. | 0.8 mm, 0.5 mm |
| D. | 0.2 mm, 0.1 mm |
| Answer» D. 0.2 mm, 0.1 mm | |
| 13. |
Tool insulation that the side machining action is needed in the process of ECM. |
| A. | limits |
| B. | enhances |
| C. | maintains |
| D. | none of the mentioned |
| Answer» B. enhances | |
| 14. |
Between which values does the side gap’s surface roughness vary? |
| A. | >1 µm |
| B. | >3 µm |
| C. | >5 µm |
| D. | >7 µm |
| Answer» D. >7 µm | |
| 15. |
State whether the following statement is true or false about electrolyte in ECM. “Machinability in ECM is enhanced, when electrolyte is heated.” |
| A. | true |
| B. | false |
| Answer» B. false | |
| 16. |
State whether the following statement is true or false regarding the working principles. “In ECM, grain boundary attacks remove the grains through electrolytic forces.” |
| A. | true |
| B. | false |
| Answer» B. false | |
| 17. |
State whether the following statement is true or false regarding the electrolytic solution. “In ECM, formation of passive film is recommended.” |
| A. | true |
| B. | false |
| Answer» C. | |
| 18. |
State whether the following statement is true or false regarding the theory of ECM. “Application of P.D (potential difference) lead to occurrence of several reactions.” |
| A. | true |
| B. | false |
| Answer» B. false | |
| 19. |
State whether the 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 | |
| 20. |
Which of the following non-metallic materials can be machined using the Chemical milling process? |
| A. | plastics |
| B. | glass |
| C. | ceramics |
| D. | all of the mentioned |
| Answer» E. | |
| 21. |
Which of the following is the most popular application for weight reduction of aerospace components? |
| A. | shallow cuts |
| B. | deep cuts |
| C. | very deep cuts |
| D. | none of the mentioned |
| Answer» B. deep cuts | |
| 22. |
Which of the following metals can be machined using the Chemical milling process? |
| A. | copper |
| B. | zinc |
| C. | steel |
| D. | all of the mentioned |
| Answer» E. | |
| 23. |
State whether the 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. | |
| 24. |
State whether the 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. | |
| 25. |
State whether the 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. | |
| 26. |
State whether the 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 | |
| 27. |
The depth of cut tolerances increases when machining depths at high machining rates. |
| A. | very smaller |
| B. | smaller |
| C. | medium |
| D. | larger |
| Answer» E. | |
| 28. |
State whether the 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. | |
| 29. |
State whether the 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 | |
| 30. |
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. | |
| 31. |
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 | |
| 32. |
State whether the following statement is true or false regarding maskants. “After etching, maskants should be removed easily and inexpensively.” |
| A. | true |
| B. | false |
| Answer» B. false | |
| 33. |
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 | |
| 34. |
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 | |
| 35. |
Special coatings applied on work piece materials in order to protect them from chemical reaction are known as |
| A. | maskants |
| B. | protective coverings |
| C. | protective varnishing |
| D. | none of the mentioned |
| Answer» B. protective coverings | |
| 36. |
Which type of thin cast layer is produced when we use EBM? |
| A. | thin layer |
| B. | thick layer |
| C. | no layer |
| D. | all of the mentioned |
| Answer» B. thick layer | |
| 37. |
How are the production times for a material in electron beam machining? |
| A. | very small |
| B. | small |
| C. | moderate |
| D. | long |
| Answer» E. | |
| 38. |
How much is the capital equipment cost of equipment used in EBM? |
| A. | very low cost |
| B. | low cost |
| C. | moderate cost |
| D. | high cost |
| Answer» E. | |
| 39. |
There is no limitation imposed on which of the following factors in EBM? |
| A. | material ductility |
| B. | surface hardness |
| C. | surface reflectivity |
| D. | all of the mentioned |
| Answer» E. | |
| 40. |
Which of the following are the advantages of EBM process? |
| A. | drilling rates |
| B. | no distortion |
| C. | high accuracy |
| D. | all of the mentioned |
| Answer» E. | |
| 41. |
1 and 16000 Hz in Electron beam machining. |
| A. | ± 10 % |
| B. | ± 20 % c) ± 30 % d) ± 40 % |
| Answer» B. ± 20 % c) ± 30 % d) ± 40 % | |
| 42. |
What is the value of largest diameter of the hole drilled on EBM? |
| A. | 0.5 mm |
| B. | 1.0 mm |
| C. | 1.5 mm |
| D. | 2.0 mm |
| Answer» D. 2.0 mm | |
| 43. |
What is the value of energy required for bond breaking? |
| A. | 10 to 20kv |
| B. | 20 to 30kv |
| C. | 30 to 40kv |
| D. | 40 to 50kv |
| Answer» B. 20 to 30kv | |
| 44. |
What is the value of maximum depth of the hole drilled on EBM? |
| A. | 10 mm |
| B. | 20 mm |
| C. | 30 mm |
| D. | 40 mm |
| Answer» D. 40 mm | |
| 45. |
Which of the following are the applications of EBM? |
| A. | hole drilling |
| B. | slotting |
| C. | perforation of thin sheets |
| D. | all of the mentioned |
| Answer» E. | |
| 46. |
Which of the following lenses are used for refocussing the electrons in EBM process? |
| A. | magnetic lens |
| B. | electronic lens |
| C. | magnetic & electronic lens |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 47. |
What are the values of power densities used in the EBM process? |
| A. | 0.05 mw/mm2 |
| B. | 0.55 mw/mm2 |
| C. | 1.55 mw/mm2 |
| D. | 2.55 mw/mm2 |
| Answer» D. 2.55 mw/mm2 | |
| 48. |
How much amount of energy is required for machining using PBM? |
| A. | low |
| B. | moderate |
| C. | high |
| D. | very high |
| Answer» B. moderate | |
| 49. |
Which of the following chemicals are used in PBM? |
| A. | harmful chlorinated fluorocarbons |
| B. | acid cleaning chemicals |
| C. | dissolvable solvent chemicals |
| D. | none of the mentioned |
| Answer» E. | |
| 50. |
What are the disadvantages of PBM? |
| A. | large power supplies |
| B. | heat produced |
| C. | toxic fumes produced |
| D. | all of the mentioned |
| Answer» E. | |