LBM-Material Removal MCQ

Test your knowledge with important LBM-Material Removal MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more LBM-Material Removal MCQs at Bissoy

• Which of the following has high machining speeds in Laser Beam Machining?
  ক

  Metals

  খ

  Non metals

  গ

  Metal alloys

  ঘ

  All of the mentioned
• How are minimum energies required for plastics when compared to that required for metals?
  ক

  Lower than

  খ

  Higher than

  গ

  Same as

  ঘ

  None of the mentioned
• How much amount of incident radiation is reflected at lower power densities?
  ক

  10 percent

  খ

  20 percent

  গ

  50 percent

  ঘ

  90 percent
• Reflectivity of the materials depends on which of the following factors?
  ক

  Wave length

  খ

  Properties of material

  গ

  Surface finish

  ঘ

  All of the mentioned
• What happens to the material removal rate when reflectivity is higher?
  ক

  Will decrease

  খ

  Will increase

  গ

  Will enhance

  ঘ

  Remains same
• Which of the following phenomenon take place before melting and evaporating in LBM?
  ক

  Conduction

  খ

  Reflection

  গ

  Absorption

  ঘ

  All of the mentioned
• Machining of LBM takes place when power density is ____________ than what is lost by conduction and radiation.
  ক

  Greater

  খ

  Smaller

  গ

  Lower

  ঘ

  Same as
• What happens to the process efficiency if plasma plumes are formed in LBM?
  ক

  Increases

  খ

  Enhances

  গ

  Decreases

  ঘ

  Improves
• State whether the following statement is true of false regarding LBM. “In LBM, high intensity laser beams are recommended for more material.”
  ক

  True

  খ

  False
• What happens when the heat is diffused into bulk material?
  ক

  Phase change occurs

  খ

  Melting occurs

  গ

  Vaporization may take place

  ঘ

  All of the mentioned
• Physics of laser is very complex due to which of the reasons below?
  ক

  Scattering loss

  খ

  Reflection loss

  গ

  Scattering & Reflection loss

  ঘ

  None of the mentioned
• What is the material removal mechanism of Laser beam machining process?
  ক

  Melt and evaporate

  খ

  Electro chemical corrosion

  গ

  Mechanical erosion of materials

  ঘ

  Electro chemical dissolution