Unconventional Machine Process Set 13

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This set of Unconventional Machine Process (UMP) Multiple Choice Questions & Answers (MCQs) focuses on Unconventional Machine Process Set 13

Q1 | Wires used in wire cut EDM are usually disposed after one usage.
  • true
  • false
Q2 | The electrode wires are usually made form            
  • graphite
  • iron
  • nickel
  • brass
Q3 |            grades wire are used in automatic re-threading mechanisms.
  • malleable
  • softer
  • harder
  • commercial
Q4 | For machining of high melting point materials,            wires are used.
  • gallium
  • zinc coated
  • aluminium coated
  • silver
Q5 |            is/are used as di-electric fluid in die sink EDM process.
  • pure water
  • silicone gel
  • petroleum products
  • epoxy resins
Q6 | Which of the following is not the application of wire cut EDM process?
  • machining ejector holes
  • cutting the ejector pins
  • machining cores of various moulds
  • machining of complex shapes made of plastic
Q7 | During mould making by wire cut EDM, it is important to harden              to counter the effects of changes in the shape of the workpiece due to heat treatment.
  • the insert
  • electrode wire
  • electrode holding coils
  • bolting points in the workpiece
Q8 | Which of the following machining process is usually preferred for cutting of ejectors which are used in mould making?
  • milling
  • hobbing
  • wire-cut edm
  • die sink edm
Q9 | How many ways are there for making the fixed cores by wire cut EDM process?
  • 2
  • 3
  • 4
  • 5
Q10 | The selection of the manufacturing process depends upon                          
  • chemical reactivity between the mould material and the di-electric fluid
  • mould shape
  • application of the mould
  • number of parts to be machined
Q11 | The wire EDM process is used for making moulds with high drafted walls.
  • true
  • false
Q12 | For manufacturing of complex shapes, soft electrode wires are used.
  • true
  • false
Q13 | What is the full form of LBM in advanced machining processes?
  • laser beam manufacturing
  • laser beam machining
  • light blast manufacturing
  • light beam machining
Q14 | LBM offers a good solution for which material properties below?
  • thermal conductivity
  • specific heat
  • boiling temperature
  • all of the mentioned
Q15 | What is the abbreviation of Laser?
  • light allowed simple emission of radiation
  • light amplification by stimulated emission of radiation
  • light amplified simultaneous emission of rays
  • light amplified stimulated emanation of rays
Q16 | Which of the following are the properties of a laser?
  • highly collimated
  • monochromatic
  • coherent light beam
  • all of the mentioned
Q17 | Laser beam machining uses which type of power sources for machining?
  • very low power
  • low power
  • medium power
  • high power
Q18 | Which of the following are different types of lasers used in Laser beam machining?
  • solid-state ion
  • neutral gas
  • semiconductor
  • all of the mentioned
Q19 | Which types of lasers are used in Laser beam machining?
  • continuous wave
  • pulsed mode
  • continuous wave & pulsed mode
  • none of the mentioned
Q20 | What is the wavelength value of Ruby laser used in Laser beam machining?
  • 633 nm
  • 694 nm
  • 856 nm
  • 1064 nm
Q21 | What is the wavelength value of Nd-YAG and Nd-glass lasers used in LBM?
  • 633 nm
  • 694 nm
  • 856 nm
  • 1064 nm
Q22 | What is the wavelength value of neutral gas laser used in LBM?
  • 633 nm
  • 694 nm
  • 856 nm
  • 1064 nm
Q23 | What is the wavelength value of CO2 laser used in Laser beam machining?
  • 0.16 μm
  • 1.6 μm
  • 10.6 μm
  • 106 μm
Q24 | What is the material removal mechanism of Laser beam machining process?
  • melt and evaporate
  • electro chemical corrosion
  • mechanical erosion of materials
  • electro chemical dissolution
Q25 | Physics of laser is very complex due to which of the reasons below?
  • scattering loss
  • reflection loss
  • scattering & reflection loss
  • none of the mentioned