Top 550+ Solved Unconventional Machine Process (UMP) MCQ Questions Answer
Q. What is the value of voltage that the power supply unit supplies for ECM?
a. 0.01 to 1 v
b. 2 to 30 v
Q. What are the values of current densities used in ECM?
a. 0.1 to 2 a/cm2
b. 5 to 500 a/cm2
c. 600 to 1000 a/cm2
d. 1200 to 2800 a/cm2
Q. Which type of adjustment is to be done for gap voltages?
a. continuous adjustment
b. discontinuous adjustment
c. periodic adjustment
d. all of the mentioned
Q. Compared to the tool used in ECM, how should be the work piece size?
a. greater than
b. smaller than
c. same as tool
d. none of the mentioned
Q. Which of the following factors are used to determine the tool geometry?
a. required shape
b. electrical conductivity
c. tool feed rate
d. all of the mentioned
Q. Which of the following are the simplest methods for applying the insulation on tools?
a. spraying
b. dipping
c. all of the mentioned
d. none of the mentioned
Q. What are the main functions of electrolyte in Electrochemical machining?
a. conduct machining current
b. removal of debris
c. maintaining constant temperature
d. all of the mentioned
Q. Electrolytic solution should ensure which type of anodic dissolution?
a. uniform
b. non-uniform
c. low speed
d. none of the mentioned
Q. Which type of electrical conductivity is necessary for electrolytic solution?
a. low
b. medium
c. high
d. none of the mentioned
Q. What are the other features of electrolytic solution in ECM?
a. non toxic
b. less erosive
c. less viscous
d. all of the mentioned
Q. How much should be the electrolytic solution?
a. highly expensive
b. inexpensive
c. all of the mentioned
d. none of the mentioned
Q. Which are the most common electrolytes used in Electrochemical machining?
a. sodium chloride
b. sodium nitride
c. sodium hydroxide
d. all of the mentioned
Q. Selection of electrolyte does not depend on which of the following factors?
a. work piece material
b. dimensional tolerance
c. heat affected zones
d. machining productivity
Q. What must be the value of electrolytic temperature in ECM?
a. 2 to 14oc
b. 22 to 45oc
c. 46 to 57oc
d. 62 to 76oc