This set of Advanced Machining Processes Multiple Choice Questions & Answers (MCQs) focuses on “Ion Beam Machining-Introduction, Material Removal Rate”.
1. What is the full form of IBM in the advanced machining processes?
a) Ion Beam Machining
b) Ion Beam Manufacturing
c) Ion Blast Machining
d) Ion Blast Manufacturing
View Answer
Explanation: The full form of IBM is Ion Beam Machining in the advanced machining processes.
2. State whether the following statement is true or false regarding IBM.
“In IBM, vacuum chamber is not necessary unlike that of Electron beam machining.”
a) True
b) False
View Answer
Explanation: Ion beam machining also requires a vacuum chamber like that required for Electron beam machining.
3. Which of the following are the components of Ion beam machining?
a) Vacuum chamber
b) Voltage source
c) Tungsten filament cathode
d) All of the mentioned
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Explanation: Main components of IBM are vacuum chamber, voltage source, tungsten cathode filament, plasma source of argon atoms and lens.
4. How does the ions strike the work piece in machining using IBM?
a) Oblique striking
b) Normal incident striking
c) Oblique & Normal incident striking
d) None of the mentioned
View Answer
Explanation: The ions may strike obliquely or at normal incidence in Ion Beam machining.
5. Number of atoms yielded in oblique cutting is __________ normal incidence.
a) Greater than
b) Lesser than
c) Same as
d) None of the mentioned
View Answer
Explanation: Number of atoms yielded for an incident atom in oblique cutting is greater than normal incidence in IBM.
6. How much amount of energy is required for effective removal of atoms?
a) 1 to 5 eV
b) 5 to 10 eV
c) 10 to 15 eV
d) 15 to 20 eV
View Answer
Explanation: About 5 to 10eV of energy is required for effective removal of atoms.
7. Machining rates in IBM depend on which of the following factors?
a) Work piece material
b) Ions type
c) Incident angle
d) All of the mentioned
View Answer
Explanation: The machining rates or yield depends on material to be machined, type of ions and incident angle.
8. What is the value of voltage required for machining in Ion beam machining?
a) 1 kV
b) 2 kV
c) 3 kV
d) 4 kV
View Answer
Explanation: The value of voltage required for machining in Ion beam machining process is about 1 kV.
9. What are the values of current densities required in IBM?
a) 0.25 mA/cm2
b) 0.35 mA/cm2
c) 0.55 mA/cm2
d) 0.85 mA/cm2
View Answer
Explanation: The value of current density of about 0.85 mA/cm2 is required for machining the work piece materials in Ion beam machining.
10. What is the value of beam diameter that is obtained in IBM?
a) 1 cm
b) 3 cm
c) 5 cm
d) 7 cm
View Answer
Explanation: The value of the beam diameter for machining the work piece material in Ion beam machining is about 5 cm.
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