MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which are the most common electrolytes used in Electrochemical machining? |
| A. | sodium chloride |
| B. | sodium nitride |
| C. | sodium hydroxide |
| D. | all of the mentioned |
| Answer» E. | |
| 2. |
What are the other features of electrolytic solution in ECM? |
| A. | non toxic |
| B. | less erosive |
| C. | less viscous |
| D. | all of the mentioned |
| Answer» E. | |
| 3. |
What are the main functions of electrolyte in Electrochemical machining? |
| A. | conduct machining current |
| B. | removal of debris |
| C. | maintaining constant temperature |
| D. | all of the mentioned |
| Answer» E. | |
| 4. |
Which type of electrical conductivity is necessary for electrolytic solution? |
| A. | low |
| B. | medium |
| C. | high |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 5. |
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. | |
| 6. |
How much should be the electrolytic solution? |
| A. | highly expensive |
| B. | inexpensive |
| C. | all of the mentioned |
| D. | none of the mentioned |
| Answer» C. all of the mentioned | |
| 7. |
Electrolytic solution should ensure which type of anodic dissolution? |
| A. | uniform |
| B. | non-uniform |
| C. | low speed |
| D. | none of the mentioned |
| Answer» B. non-uniform | |
| 8. |
Which of the following are the simplest methods for applying the insulation on tools? |
| A. | spraying |
| B. | dipping |
| C. | all of the mentioned |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 9. |
Which of the following factors are used to determine the tool geometry? |
| A. | required shape |
| B. | electrical conductivity |
| C. | tool feed rate |
| D. | all of the mentioned |
| Answer» E. | |
| 10. |
Compared to the tool used in ECM, how should be the work piece size? |
| A. | greater than |
| B. | smaller than |
| C. | same as tool |
| D. | none of the mentioned |
| Answer» B. smaller than | |
| 11. |
Which type of adjustment is to be done for gap voltages? |
| A. | continuous adjustment |
| B. | discontinuous adjustment |
| C. | periodic adjustment |
| D. | all of the mentioned |
| Answer» B. discontinuous adjustment | |
| 12. |
What are the values of current densities used in ECM? |
| A. | 0.1 to 2 a/cm2 |
| B. | 5 to 500 a/cm2 |
| C. | 600 to 1000 a/cm2 |
| D. | 1200 to 2800 a/cm2 |
| Answer» C. 600 to 1000 a/cm2 | |
| 13. |
What is the value of voltage that the power supply unit supplies for ECM? |
| A. | 0.01 to 1 v |
| B. | 2 to 30 v |
| C. | 50 to 80 v |
| D. | 100 to 160 v |
| Answer» C. 50 to 80 v | |
| 14. |
For high strength or rigidity, which type of coatings are recommended for metals? |
| A. | other metal coatings |
| B. | non-metallic coatings |
| C. | all of the mentioned |
| D. | none of the mentioned |
| Answer» C. all of the mentioned | |
| 15. |
Electrolyte supply system should concentrate on which of the following factors? |
| A. | pressure |
| B. | supply rate |
| C. | temperature |
| D. | all of the mentioned |
| Answer» E. | |
| 16. |
For large size machining, which type of facilities are used in ECM? |
| A. | semi-automated facilities |
| B. | automated facilities |
| C. | automated & semi-automated facilities |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 17. |
What is the role of power supply unit in ECM equipment? |
| A. | giving feed to tool |
| B. | electrolyte supply |
| C. | power supply |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 18. |
In ECM equipment, what is the role of electrolyte supply system? |
| A. | giving feed to tool |
| B. | electrolyte supply |
| C. | power supply |
| D. | none of the mentioned |
| Answer» C. power supply | |
| 19. |
Feed control system is responsible for which action in ECM? |
| A. | giving feed to tool |
| B. | electrolyte supply |
| C. | power supply |
| D. | none of the mentioned |
| Answer» B. electrolyte supply | |
| 20. |
Which of the following come under the main components of ECM? |
| A. | feed control system |
| B. | work piece holding devices |
| C. | electrolyte supply system |
| D. | all of the mentioned |
| Answer» E. | |
| 21. |
Which of the following reactions take place at cathode? |
| A. | generation of hydrogen |
| B. | dissolution of iron |
| C. | dissolution of nacl |
| D. | all of the mentioned |
| Answer» B. dissolution of iron | |
| 22. |
Negatively charged particles (anions) move towards which electrode? |
| A. | anode |
| B. | cathode |
| C. | anode & cathode |
| D. | none of the mentioned |
| Answer» B. cathode | |
| 23. |
Positively charged particles (cations) move towards which electrode? |
| A. | anode |
| B. | cathode |
| C. | anode & cathode |
| D. | none of the mentioned |
| Answer» C. anode & cathode | |
| 24. |
Which of the following reaction takes place at anode? |
| A. | generation of hydrogen |
| B. | dissolution of iron |
| C. | generation of hydroxyl ions |
| D. | none of the mentioned |
| Answer» C. generation of hydroxyl ions | |
| 25. |
Which of the following reactions takes place at the electrodes? |
| A. | generation of hydrogen |
| B. | dissolution of iron |
| C. | dissolution of nacl |
| D. | all of the mentioned |
| Answer» E. | |
| 26. |
Of the following, electrolyte removes which of the dissolution products? |
| A. | metal hydroxides |
| B. | heat |
| C. | gas bubbles |
| D. | all of the mentioned view answer |
| Answer» E. | |
| 27. |
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 | |
| 28. |
What is the value of velocity with which, electrolyte flows in the inter electrode gap? |
| A. | >1 m/s |
| B. | >3 m/s |
| C. | >5 m/s |
| D. | >10 m/s |
| Answer» D. >10 m/s | |
| 29. |
What are the values of voltages used in ECM? |
| A. | 1 to 8 v |
| B. | 10 to 30 v |
| C. | 40 to 80 v |
| D. | 90 to 110 v |
| Answer» C. 40 to 80 v | |
| 30. |
How does the current pass between the two electrodes in ECM? |
| A. | electrolytic solution |
| B. | direct contact of electrodes |
| C. | all of the mentioned |
| D. | none of the mentioned |
| Answer» B. direct contact of electrodes | |
| 31. |
Chemical equivalent is the ratio of which of the following factors? |
| A. | work piece valence to the atomic weight |
| B. | atomic weight to work piece valence |
| C. | tool valence to molecular weight |
| D. | molecular weight to tool valence |
| Answer» C. tool valence to molecular weight | |
| 32. |
Amount of mass dissolved is directly proportional to which of the following quantities? |
| A. | amount of electricity |
| B. | frequency of vibrations |
| C. | amplitude of oscillations |
| D. | all of the mentioned |
| Answer» B. frequency of vibrations | |
| 33. |
The chemical reactions occurring at electrodes are called with, which of the following names? |
| A. | anodic reactions |
| B. | cathode reactions |
| C. | all of the mentioned |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 34. |
The system which consists of electrolytic solution and electrodes can be referred to as |
| A. | electrolytic cell |
| B. | electrode system |
| C. | electrolytic system |
| D. | electrode cell |
| Answer» B. electrode system | |
| 35. |
Electrolysis occur when which of the following takes place between electrodes? |
| A. | electric current flow |
| B. | electron flow |
| C. | all of the mentioned |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 36. |
Which of the following material removal mechanisms is implemented by ECM? |
| A. | mechanical abrasion |
| B. | electrochemical dissolution |
| C. | chemical corrosion |
| D. | mechanical erosion |
| Answer» C. chemical corrosion | |
| 37. |
In the following scientists, who was the one to introduce first patent on ECM? |
| A. | balamuth |
| B. | steve o flawer |
| C. | gusseff |
| D. | mcgeough |
| Answer» D. mcgeough | |
| 38. |
Which of the following are the limitations of Chemical milling process? |
| A. | disposal of chemicals |
| B. | limited scribing accuracy |
| C. | surface imperfections |
| D. | all of the mentioned |
| Answer» E. | |
| 39. |
Simultaneous material removal using Chemical milling, results in which of the following? |
| A. | improves productivity |
| B. | reduces wrapping |
| C. | minimizing part distortion |
| D. | all of the mentioned |
| Answer» E. | |
| 40. |
Of the following, which mechanism is used for the removal of material using Chemical milling process? |
| A. | material vaporization |
| B. | chemical dissolution |
| C. | mechanical erosion |
| D. | mechanical abrasion |
| Answer» C. mechanical erosion | |
| 41. |
What is the value of material removal rate in Plasma Beam Machining process? |
| A. | 50 cm3/min |
| B. | 100 cm3/min |
| C. | 150 cm3/min |
| D. | 200 cm3/min |
| Answer» D. 200 cm3/min | |
| 42. |
How much amount of tapers are occurred in Laser drilled holes? |
| A. | no taper |
| B. | negligible amount of taper |
| C. | some amount |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 43. |
Which of the following has high machining speeds in Laser Beam Machining? |
| A. | metals |
| B. | non metals |
| C. | metal alloys |
| D. | all of the mentioned |
| Answer» C. metal alloys | |
| 44. |
What is the material removal mechanism of Laser beam machining process? |
| A. | melt and evaporate |
| B. | electro chemical corrosion |
| C. | mechanical erosion of materials |
| D. | electro chemical dissolution |
| Answer» B. electro chemical corrosion | |
| 45. |
Laser beam machining uses which type of power sources for machining? |
| A. | very low power |
| B. | low power |
| C. | medium power |
| D. | high power |
| Answer» E. | |
| 46. |
In wire-cut EDM process, material removal takes place by a series of discrete discharges between |
| A. | di-electric fluid and the wire electrode |
| B. | the wire-electrode and the workpiece |
| C. | the workpiece and the cnc-table |
| D. | wire electrodes |
| Answer» C. the workpiece and the cnc-table | |
| 47. |
The materials which are not stress-relieved before machining by WEDM process can get distorted during machining. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 48. |
Which motion of tool is used for machining spherical surfaces in Electro discharge machining? |
| A. | oscillatory |
| B. | vibratory |
| C. | rotary |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| 49. |
Which of the following electrodes are used for machining spherical surfaces in Electro discharge machining? |
| A. | tubular electrodes |
| B. | flat electrodes |
| C. | cuboidal electrodes |
| D. | all of the mentioned |
| Answer» B. flat electrodes | |
| 50. |
What are the surface roughness values obtained while machining spherical surfaces using Electro discharge machining? |
| A. | <0.1 µm |
| B. | <0.3 µm |
| C. | <0.5 µm |
| D. | <0.7 µm |
| Answer» B. <0.3 µm | |