This set of Advanced Machining Processes Multiple Choice Questions & Answers (MCQs) focuses on “Laser Beam Machining-Introduction”.
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
View Answer
Explanation: 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
View Answer
Explanation: 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
View Answer
Explanation: 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
View Answer
Explanation: 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
View Answer
Explanation: 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
View Answer
Explanation: 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
d) None of the mentioned
View Answer
Explanation: 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
View Answer
Explanation: 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
d) 1064 nm
View Answer
Explanation: 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
View Answer
Explanation: 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
View Answer
Explanation: 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
View Answer
Explanation: 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
View Answer
Explanation: 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
View Answer
Explanation: The wavelengths of Argon laser used in LBM range from 330 – 530 nm.
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