Hello Friends Today’s We See Electron Beam Machining Question and Answer .
Now Let’s Start Electron Beam Machining Question and Answer.
Electron Beam Machining Question and Answer:
1. In electron beam machining after cathode there is
- port for vacuum gauge
- bias grid
- a magnetic lens
- deflector coil
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Answer- Option B ( bias grid)
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2. In electron beam machining the electron is accelerated by
- annular anode
- aperture
- cathode catridge
- electromagnetic coils
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Answer- Option A ( annular anode)
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3. ……. determines the mode of an electron beam
- operating pressure
- position of magnetic lens
- the nature of biasing
- applied voltage
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Answer- Option C ( the nature of biasing)
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4. In electron beam machining after anode the electron beam passes through
- cathode catridge
- a series of lenses
- bias grid
- deflector coils
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Answer- Option B ( a series of lenses)
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5. In the electron beam machining the electron beam gun appratus
- allow only convergent electron to pass
- allow divergent electron to pass
- accelerates the electron beam
- absorb convergent electrons
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Answer- Option A ( allow only convergent electron to pass)
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6. In electron beam machining the purpose of a series of slotted rotating disc provided between the electron beam gun and the workpiece
- It can increase the intensity of the beam (if needed)
- it increase the accuracy of the beam
- It prevents vapour generated during machining to reach the gun
- It prevent power loss
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Answer- Option C ( it prevents vapour generated during machining to reach the gun)
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7. For alingment of beam … is provided in electron beam machining
- a telescope
- a lens
- microscope
- magnifier
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Answer- Option A ( a telescope)
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8. In electron beam machining the mechanism of material removal
- chemical etching by the high energy electron
- mechanical erosion due to impact of high of energy electrons
- melting and vaporization due to the thermal effect of impingment of high energy electron
- sputtering due to high energy electron
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Answer- Option C ( melting and vaporization due to thermal effect of impigment of high energy electron)
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9. Electron beam machining is …. process
- thermal
- adiabatic
- iso-thermal
- isentropic
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Answer- Option A (thermal)
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10. where the electron beam machining is carried out
- thermally insulated area
- highly pressure vessel
- vacuum
- none of the above
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Answer- Option C ( vacuum)
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11. During electron beam machining …… is kept under vacuum.
- whole setup
- the workpiece
- electron gun
- none of the above
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Answer- Option B ( the workpiece)
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12. In electron beam machining the electron strike the work material
- heat energy is converted to kinetic energy
- electrical energy is converted to heat energy
- kinectic energy is converted to heat energy
- none of the above
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Answer- Option C ( kinetic energy is converted to heat energy)
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13. The gun in electron beam machining is used in …… mode
- biasing
- pulsed
- wave guide
- high intensity
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Answer- Option B ( pulsed)
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14. One of the following is not a function of EBM
- generating of electrons
- focusing the beam
- absorbing the electron beam
- none of the above
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Answer- Option C ( absorbing the electron beam )
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15. In electron beam machining … is used to make cathode for electron beam gun
- Aluminium
- Tantalum
- Rubidium
- molybdenum
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Answer- Option B ( tantalum)
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