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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