Unconventional Machine Process Set 15

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This set of Unconventional Machine Process (UMP) Multiple Choice Questions & Answers (MCQs) focuses on Unconventional Machine Process Set 15

Q1 | Which of the following properties of material affect the quality of holes obtained?
  • reflectivity
  • absorption coefficient
  • thermal conductivity
  • all of the mentioned
Q2 | What range of powers are used for cutting through steel?
  • 1 to 20 w
  • 20 to 100 w c) 200 to 1000 w
  • d) 1 to 20 kw
Q3 | Which gas jet assisted process is suitable for most of the metals?
  • oxygen gas
  • nitrogen gas
  • helium gas
  • all of the mentioned
Q4 | What happens to the cutting speed with an increase in the work piece?
  • increases
  • decreases
  • enhances
  • remains same
Q5 | What is the full form of LBT in the processes of LBM?
  • laser beam tempering
  • laser beam templating
  • laser beam texturing
  • laser beam tinning
Q6 | Depth and the crater size depends on which of them below?
  • energy of beam
  • dwell time of beam
  • energy & dwell time of beam
  • none of the mentioned
Q7 | Where are the textured surfaces used that are obtained in LBT?
  • mould makings
  • bearings
  • printer roll manufacturing
  • all of the mentioned
Q8 | The roll is                    and the laser beam is moved                  along the roll.
  • stationary, axially
  • stationary, perpendicularly
  • rotated, axially
  • rotated, perpendicularly
Q9 | State whether the following statement is true regarding the texturing in LBT. “In LBT, hardness of the material is a limitation to the process.”
  • true
  • false
Q10 | Which of the following are the other applications of LBM?
  • dressing of grinding wheels
  • scribing
  • micromachining
  • all of the mentioned
Q11 | How the grooves in grinding wheels are produced using laser?
  • evaporation
  • damage of composite
  • evaporation & damage of composite
  • none of the mentioned
Q12 | Work piece tilting depends on which of the following factors?
  • incident power
  • beam speed
  • groove direction
  • all of the mentioned
Q13 | Lasers of which type are used for modification of electronic components?
  • high power
  • small spot size
  • short pulse length
  • all of the mentioned
Q14 | Material removal rates which are about mg/pulse produces which type of holes?
  • shallow
  • deep
  • very deep
  • all of the mentioned
Q15 | Which of the following materials can be easily separated by laser scribing?
  • silicon
  • glass
  • ceramic
  • all of the mentioned
Q16 | Which type of holes can be drilled using Nd-YAG laser?
  • small holes
  • large holes
  • small & large holes
  • none of the mentioned
Q17 | Which type of laser can be used for direct drilling or percussion?
  • ruby laser
  • nd-yag laser
  • ruby & nd-yag laser
  • none of the mentioned
Q18 | Which of the following lasers is used for cutting thick materials in LBM?
  • co2 + gas assisted
  • co2 only
  • nd-yag
  • ruby
Q19 | Which of the following lasers is used for slitting of thin metallic materials in LBM?
  • co2 + gas assisted
  • co2 only
  • nd-yag
  • ruby
Q20 | Which of the following lasers is used for slitting of thin plastic materials in LBM?
  • co2 + gas assisted
  • co2 only
  • nd-yag
  • ruby
Q21 | Which of the following lasers is used for organics and non-metallic materials in LBM?
  • co2 + gas assisted
  • pulsed co2
  • nd-yag
  • ruby
Q22 | Which of the following lasers is used for ceramic materials in LBM?
  • pulsed co2
  • nd-yag
  • pulsed co2 & nd-yag
  • none of the mentioned
Q23 | Which of the following is not an advantage of LBM?
  • rapid machining
  • low operating cost
  • high equipment cost
  • no tool wear
Q24 | Which of the following systems is used for locating the hole accurately for alignment?
  • mechanical control system
  • optical laser system
  • measurement system
  • alignment system
Q25 | Very                      holes with a                  aspect ratio can be produced using Laser beam machining.
  • small, small
  • small, large
  • large, small
  • large, large