Advanced Machining Processes Multiple Choice Questions on “Laser Beam Machining-Introduction”.

Endurance Lab presents an overview of the software for laser cutting or engraving. In this article, I would like to focus on three popular programs: mDraw and Benbox, CNCC LaserAxe. First of all, we want you to note that mDraw is a cross-platform open-source software that can be installed on Windows, Mac OS, and Linux operating systems. Effect of laser beam scanning mode on the material removal efficiency was investigated through the evaluation of the processing time for cutting through a 5 mm length in the glass substrate. The parameters investigated on the beam scanning mode covers the varied scanning speed, i.e., the amount of laser spot overlap in a single line scan, focus.

1. What is the full form of LBM in advanced machining processes?
a) Laser Beam Manufacturing
b) Laser Beam Machining
c) Light Blast Manufacturing
d) Light Beam Machining
Answer: b
Clarification: The full form of LBM is Laser Beam Machining in the advanced machining processes.

2. LBM offers a good solution for which material properties below?
a) Thermal conductivity
b) Specific heat
c) Boiling temperature
d) All of the mentioned
Answer: d
Clarification: LBM offers good solution for material properties such as thermal conductivity, specific heat, melting and boiling temperatures.

3. What is the abbreviation of Laser?
a) Light allowed simple emission of radiation
b) Light amplification by stimulated emission of radiation
c) Light amplified simultaneous emission of rays
d) Light amplified stimulated emanation of rays
Answer: b
Clarification: Full form of laser is Light Amplification by Stimulated emission of radiation.

4. Which of the following are the properties of a laser?
a) Highly collimated
b) Monochromatic
c) Coherent light beam
d) All of the mentioned
Answer: d
Clarification: Highly collimated, high monochromaticity and the coherence of the light beam are the properties of a laser.

5. 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: d
Clarification: High power densities are used for the generation of laser and for machining in Laser beam machining.

6. Which of the following are different types of lasers used in Laser beam machining?
a) Solid-state ion
b) Neutral gas
c) Semiconductor
d) All of the mentioned
Answer: d
Clarification: Laser such as solid-state ion, neutral gas, molecular, semiconductor etc.., can be used in LBM.

7. Which types of lasers are used in Laser beam machining?
a) Continuous wave
b) Pulsed mode
c) Continuous wave & Pulsed mode

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d) None of the mentioned
Answer: c
Clarification: Laser may be in continuous wave (CW) or in Pulsed mode (PM) for machining in LBM.

8. What is the wavelength value of Ruby laser used in Laser beam machining?
a) 633 nm
b) 694 nm
c) 856 nm
d) 1064 nm
Answer: b
Clarification: The value of wave length of Ruby laser used in Laser Beam machining is 694 nm.

9. What is the wavelength value of Nd-YAG and Nd-glass lasers used in LBM?
a) 633 nm
b) 694 nm
c) 856 nm

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d) 1064 nm
Answer: d
Clarification: The value of wave length of Nd-YAG and Nd-glass lasers used in LBM is 1064 nm.

10. What is the wavelength value of neutral gas laser used in LBM?
a) 633 nm
b) 694 nm
c) 856 nm
d) 1064 nm
Answer: a
Clarification: The value of wave length of Neutral gas laser used in Laser beam machining is 633 nm.

11. What is the wavelength value of CO₂ laser used in Laser beam machining?
a) 0.16 μm
b) 1.6 μm
c) 10.6 μm
d) 106 μm
Answer: c
Clarification: The value of wave length of CO₂ laser used in Laser Beam machining is 10.6 μm.

12. What are the values of wavelengths of GaAs laser used in LBM?
a) 100 – 200 nm
b) 200 – 400 nm
c) 600 – 700 nm
d) 800 – 900 nm
Answer: d
Clarification: The wavelengths of GaAs laser used in LBM range from 800 – 900 nm.

13. What are the values of wavelengths of Excimer laser used in LBM?
a) 100 – 200 nm
b) 200 – 500 nm
c) 600 – 700 nm
d) 800 – 900 nm
Answer: b
Clarification: The wavelengths of Excimer laser used in LBM range from 200 – 500 nm.

14. What are the values of wavelengths of Argon laser used in LBM?
a) 120 – 230 nm
b) 220 – 310 nm
c) 330 – 530 nm
d) 760 – 940 nm
Answer: c
Clarification: The wavelengths of Argon laser used in LBM range from 330 – 530 nm.

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