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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