Q.1
What does faraday’s second law electrolysis state?
  • a) W∝Q, where W= mass of substance deposited and Q= charge passed through the electrolyte
  • b) w1/w2 = E1/E2, where w1 and w2 = mass of different substances deposited, and E1 and E2 = their equivalent masses
  • c) Induced EMF = – dΦ / dt
  • d) Force between two charge particles q1 and q2, F= kq1q2/r2
Q.2
What is faraday’s first law of electrolysis?
  • a) W∝T, where W= mass of substance deposited and T= temperature of the electrolyte
  • b) W∝K, where W= mass of substance deposited and K= ionisation constant of the electrolyte
  • c) W∝Q, where W= mass of substance deposited and Q= charge passed through the electrolyte
  • d) W∝ 1/Q, where W= mass of substance deposited and Q= charge passed through the electrolyte
Q.3
In ECM, accuracy of the product is independent of the accuracy of the cathode tool.
  • a) True
  • b) False
Q.4
Which of the following materials can be used for making cathode tool?
  • a) Monel
  • b) Cast iron
  • c) Lead
  • d) Carbides
Q.5
Conductivity of the electrolyte is unaffected by the loss of hydrogen during electrolysis.
  • a) True
  • b) False
Q.6
Which of the following manufacturing process is favourable for making tool for ECM?
  • a) Casting
  • b) Cold forging
  • c) Laser cutting
  • d) Shaping
Q.7
Precipitate formation reduces the conductivity of the electrolyte solution.
  • a) True
  • b) False
Q.8
Solubility of the reaction products increases with_____
  • a) increase in pressure of the electrolyte
  • b) increase in temperature of the electrolyte
  • c) increase in work-tool gap
  • d) decrease in temperature of the electrolyte
Q.9
In order to obtain good results in ECM, _____
  • a) maximise polarization
  • b) allow rise in temperature of the electrolyte
  • c) removal of used electrolyte form the working gap
  • d) decrease the concentration of the electrolyte
Q.10
Increase in pressure of the electrolyte above atmospheric pressure is beneficial.
  • a) True
  • b) False
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