Advanced Machining Questions and Answers – Electronbeam Machining-Introduction, Equipment and Material removal

This set of Advanced Machining Processes Multiple Choice Questions & Answers (MCQs) focuses on “Electronbeam Machining-Introduction, Equipment and Material removal”.

1. What is the full form of EBM in the advanced machining processes?
a) Electro blast manufacturing
b) Electron beam machining
c) Electron beam manufacturing
d) Electron blast manufacturing
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2. The prototype of the machine used in EBM process was first introduced in which year?
a) 1924
b) 1943
c) 1947
d) 1956
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3. When did the Electron beam machining come into the machining industry?
a) 1920s
b) 1930s
c) 1950s
d) 1960s
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4. Which of the following are the applications of EBM process?
a) Drilling
b) Cutting
c) Engraving
d) All of the mentioned
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5. The tungsten filament cathode is heated to what temperatures in EBM?
a) 1000 to 1500 ᵒC
b) 1500 to 2000 ᵒC
c) 2500 to 3000 ᵒC
d) 3500 to 5000 ᵒC
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6. What are the values of currents used in EBM process?
a) 1 and 20 mA
b) 20 and 100 mA
c) 100 and 200 mA
d) 200 and 400 mA
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7. What are the values of current densities used in the process of EBM?
a) 5 and 15 A/cm²
b) 15 and 20 A/cm²
c) 20 and 30 A/cm²
d) 40 and 60 A/cm²
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8. Emission current depends up on which of the following factors?
a) Cathode material
b) Temperature
c) Voltage supply
d) All of the mentioned
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9. What are the values of voltages used in the EBM process?
a) 10 V
b) 50 V
c) 150 V
d) 200 V
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10. 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
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11. What are the values of velocity maintained in the EBM process?
a) 118 x 10³ m/s
b) 228 x 10³ m/s
c) 338 x 10³ m/s
d) 448 x 10³ m/s
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12. 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
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13. What is the frequency of the pulse of electrons used in EBM process?
a) 10 Hz
b) 10² Hz
c) 10³ Hz
d) 10⁴ Hz
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14. What are the values of material removal rates in EBM process?
a) 1 mm³/min
b) 10 mm³/min
c) 100 mm³/min
d) 1000 mm³/min
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15. What are the values of the cavity diameters that are obtained in EBM?
a) 15 to 20 µm
b) 20 to 25 µm
c) 30 to 35 µm
d) 35 to 40 µm
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Sanfoundry Global Education & Learning Series – Advanced Machining.

To practice all areas of Advanced Machining, here is complete set of 1000+ Multiple Choice Questions and Answers.