MCQOPTIONS
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MCQOPTIONS
This section includes 10 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. |
IN_ECM,_WORKPIECE_ACTS_AS_A_CATHODE.?$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
Electrolyte_used_in_ECM_should_have______________$ |
| A. | high specific heat |
| B. | lower resistance to film formation on the workpiece |
| C. | higher viscosity |
| D. | corrosive nature |
| Answer» B. lower resistance to film formation on the workpiece | |
| 3. |
In ECM operation of pure iron an equilibrium gap (h) of 2 mm is to be kept. What will be the supply voltage (v), if the total overvoltage is 2.5 Volts. The resistivity(r) of the electrolyte is 50 Ω-mm and the set feed rate (f) is 0.25 mm/min?# |
| A. | 5v |
| B. | 7.8v |
| C. | 11.3v |
| D. | 13.2v |
| Answer» E. | |
| 4. |
In ECM of pure iron a material removal rate of 600 mm3/min is required. What will be the current requirement? |
| A. | 157A |
| B. | 183.6A |
| C. | 247.8A |
| D. | 268.8A |
| Answer» E. | |
| 5. |
Commercial ECM is carried out at a combination of ___________ |
| A. | low voltage high current |
| B. | low current low voltage |
| C. | high current high voltage |
| D. | high voltage only |
| Answer» B. low current low voltage | |
| 6. |
For which of the following ECM cannot be undertaken? |
| A. | Steel |
| B. | Nickel based superalloy |
| C. | Aluminium oxide |
| D. | Titanium alloy |
| Answer» D. Titanium alloy | |
| 7. |
MRR is ECM depends on _____________ |
| A. | hardness of work material |
| B. | atomic weight of work material |
| C. | thermal conductivity of work material |
| D. | ductility of work material |
| Answer» C. thermal conductivity of work material | |
| 8. |
For ECM of steel which is used as the electrolyte? |
| A. | Kerosene |
| B. | NaCl |
| C. | Deionised water |
| D. | HNO<sub>3</sub> |
| Answer» C. Deionised water | |
| 9. |
ECM can also be called as un-controlled anodic dissolution. |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
Electro-chemical machining is opposite of electrochemical coating. |
| A. | True |
| B. | False |
| Answer» B. False | |