Q.1
What is the value of gap voltage maintained in ECG process?
  • a) 1 to 10 V
  • b) 4 to 40 V
  • c) 40 to 400 V
  • d) 500 to 5000 V
Q.2
What are the values of current densities used in the ECG process?
  • a) 1 to 60 A/cm2
  • b) 60 to 120 A/cm2
  • c) 120 to 240 A/cm2
  • d) 240 to 480 A/cm2
Q.3
Current density depends on which of the following factors?
  • a) Machined material
  • b) Gap width
  • c) Applied voltage
  • d) All of the mentioned
Q.4
What is the main mechanism of material removal in Electro chemical grinding?
  • a) Mechanical erosion of material
  • b) Electro chemical dissolution
  • c) Melting and vaporization
  • d) Electron removal from material
Q.5
The grinding wheel is _________ and the work piece is ________ in ECG process.
  • a) Cathode, anode
  • b) Anode, cathode
  • c) Cathode, cathode
  • d) Anode, anode
Q.6
Mechanical abrasion counts to how much amount of the material removal in ECG?
  • a) 1 to 5%
  • b) 5 to 10%
  • c) 10 to 15%
  • d) 15 to 20%
Q.7
Removal rates of ECG process are how may time to that of the conventional machining processes?
  • a) 2 times
  • b) 3 times
  • c) 4 times
  • d) 5 times
Q.8
How much amount of burr is produce in Electro chemical grinding process?
  • a) Less amount
  • b) Moderate amount
  • c) High amount
  • d) No burrs are produced
Q.9
What are the volumetric removal rates that are obtained in ECG process?
  • a) 400 mm3/min
  • b) 800 mm3/min
  • c) 1600 mm3/min
  • d) 3200 mm3/min
Q.10
ECG is a hybrid machining process of which material removal mechanisms below?
  • a) Mechanical abrasion
  • b) Electro chemical dissolution
  • c) Mechanical abrasion & Electro chemical dissolution
  • d) None of the mentioned
Q.11
Action of abrasive grains depend on which of the following factors?
  • a) Electric filed
  • b) Transport of electrolyte
  • c) Hydrodynamic effects
  • d) All of the mentioned
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