Unconventional Machine Process Set 11

Mechanical Engineering

Practice Mode Previous Next
On This Page

This set of Unconventional Machine Process (UMP) Multiple Choice Questions & Answers (MCQs) focuses on Unconventional Machine Process Set 11

Q1 | Texturing is applied to the steel sheets at which stages of cold rolling?
  • initial stages
  • middle stages
  • final stages
  • all of the mentioned
Answer: initial stages
Explaination:
at the final stages of cold rolling, texturing is applied to the steel sheets.
Q2 | What is the full form of EDT in EDM processes?
  • electro discharge tinplating
  • electro discharge texturing
  • electro discharge tapping
  • electro discharge turing
Answer: electro discharge texturing
Explaination:
electro discharge texturing is a variant of edm which is the full form of edt.
Q3 | Which of the following are the process variables for texturing process in EDM?
  • pulse current
  • electrode polarity
  • dielectric type
  • all of the mentioned
Answer: all of the mentioned
Explaination:
pulse current, polarity, dielectric, electrode material and roll rotation speed are some process variables of texturing.
Q4 | What are the values of current amplitudes used in EDT?
  • 0.2 to 1 a
  • 2 to 10 a
  • 20 to 100 a
  • 40 to 200 a
Answer: 2 to 10 a
Explaination:
the values of current amplitudes in edt range from 2 to 10 a.
Q5 | What are duration values of current amplitude in EDT?
  • 0.1 to 1 µs
  • 1 to 10 µs c) 10 to 100 µs
  • d) 100 to 1000 µs
Answer: d) 100 to 1000 µs
Explaination:
duration of current amplitudes used for edt range from 10 to 100 µs.
Q6 | What are the spindle rotation speeds used in EDT?
  • 1 to 4 rpm
  • 10 to 40 rpm
  • 20 to 60 rpm
  • 30 to 90 rpm
Answer: 10 to 40 rpm
Explaination:
spindle rotation speeds for edt process range from 10 to 40 rpm.
Q7 | What happens to the machine capital cost in EDT when there is an increase in tool quantity?
  • decreases
  • increases
  • remains same
  • none of the mentioned
Answer: increases
Explaination:
with increase in tools quantity machine cost increases but texturing cost reduces.
Q8 | What is the value of depth to diameter ratio in Micro-Electro discharge machining process?
  • 10:1
  • 5:2
  • 4:3
  • 2:1
Answer: 10:1
Explaination:
value of the depth to diameter ratio in micro-electro discharge machining is about 10:1.
Q9 | What are the values of depths that can be machined using Micro-EDM?
  • 1 mm
  • 10 mm
  • 100 mm
  • 1000 mm
Answer: 100 mm
Explaination:
micro-electro discharge machining can machine up to a depth of 100 mm in the work piece material.
Q10 | What are the machining rates used in Micro-EDM process?
  • 0.1 to 2 mm/min
  • 1 to 20 mm/min
  • 10 to 200 mm/min
  • 100 to 500 mm/min
Answer: 1 to 20 mm/min
Explaination:
machining rates used in micro-edm process range from 1 to 20 mm/min.
Q11 | What are the values of hole diameters obtained using Wire electro discharge grinding?
  • 1 µm
  • 3 µm
  • 5 µm
  • 7 µm
Answer: 5 µm
Explaination:
values of hole diameters up to 5 µm can be obtained using wire electro discharge grinding process.
Q12 | What are the feed rates used in WEDG process?
  • 1 to 5 mm/min
  • 5 to 10 mm/min
  • 10 to 15 mm/min
  • 15 to 20 mm/min
Answer: 5 to 10 mm/min
Explaination:
feed rate values in wedg process range from 5 to 10 mm/min
Q13 | Which of the following is a major difficulty in the Electro discharge machining process?
  • proper sparks
  • abnormal discharges
  • optimum feed rates
  • no burr
Answer: abnormal discharges
Explaination:
avoidance of abnormal discharges has become a major difficulty in electro discharge machining process.
Q14 | What has been done to the off time when there is a no-load voltage of electric discharge?
  • increased
  • decreased
  • reduced
  • remains same
Answer: increased
Explaination:
the off time of pulse is increased in order to avoid the abnormal electric discharges.
Q15 | In a simple application which of the following parameters are inputs?
  • pulse duration and current
  • normal and abnormal pulses
  • all of the mentioned
  • none of the mentioned
Answer: pulse duration and current
Explaination:
inputs used are pulse duration and current in a simple application.
Q16 | In a simple application which of the following parameters are outputs?
  • pulse duration and current
  • normal and abnormal pulses
  • all of the mentioned
  • none of the mentioned
Answer: pulse duration and current
Explaination:
outputs used are normal and abnormal pulses in a simple application.
Q17 | Which of the following are correlated with the machining conditions at output stage?
  • machining depth
  • surface roughness
  • accuracy
  • all of the mentioned
Answer: all of the mentioned
Explaination:
machining depth, surface roughness, accuracy are correlated with the machining conditions at the output stage.
Q18 | How are EDM’s levels of integration when compared to conventional machining?
  • slower rate
  • faster rate
  • same rate
  • none of the mentioned
Answer: slower rate
Explaination:
edm’s levels of computer integration is at a slower rate when compared to conventional machining processes.
Q19 | Manufacturing of tool electrode undergoes which of the following processes?
  • milling
  • turning
  • finishing
  • all of the mentioned
Answer: all of the mentioned
Explaination:
the tool electrode manufacturing used in edm has to undergo the basic production processes such as milling, turning and finishing.
Q20 | High temperatures produced in the working gap results in which of the following potentials?
  • hazardous smoke
  • toxic vapours
  • aerosols
  • all of the mentioned
Answer: all of the mentioned
Explaination:
the temperatures in the working gap increases leading to hazardous smoke, vapours and aerosols.
Q21 | Hydro carbons present in the dielectric fluid have impact on which of the body parts?
  • eyes
  • teeth
  • skin
  • nails
Answer: skin
Explaination:
hydrocarbons present in dielectric fluids of edm will have a negative impact on the skin in our body.
Q22 | What happens to the Electro discharge machining process under unfavourable working conditions?
  • will remain stable
  • explosion may occur
  • machining rate increases
  • nothing happens
Answer: explosion may occur
Explaination:
explosion occurs if electro discharge machining is done under unfavourable process variables and conditions.
Q23 | Reduction in the electrical energy consumption will have impact on which aspects mentioned below?
  • environmental
  • economic
  • environmental & economic
  • none of the mentioned
Answer: environmental & economic
Explaination:
the reduction of electric energy consumption has economic as well as environmental benefits
Q24 | A thin metallic wire used in wire-cut EDM is kept submerged in a tank of            
  • dielectric fluid
  • pure water
  • molten metal
  • kerosene
Answer: dielectric fluid
Explaination:
the wire electric discharge machining (wedm) is a variation of edm and is commonly known as wire-cut edm or wire cutting. in this process, a thin metallic wire is fed onto the workpiece, which is submerged in a tank of dielectric fluid such as deionized water.
Q25 | Wire-cut EDM can cut plates of thickness upto            
  • 50mm
  • 100mm
  • 300mm
  • 500mm
Answer: 300mm
Explaination:
wire-cut edm process can cut plates as thick as 300mm and is used for
Previous Next