Top 550+ Solved Unconventional Machine Process (UMP) MCQ Questions Answer
Q. Better surface finish and higher accuracy depend on which of the factors below?
a. chemical composition of the electrolyte
b. current density
c. all of the mentioned
d. none of the mentioned
Q. For alloys, which type of electrolyte is used in ECM?
a. single component
b. double component
c. multi component
d. triple component
Q. Nickel can be machined with 100% current efficiency, when current density value is
a. 10 a/cm2
b. 25 a/cm2
c. 45 a/cm2
d. 80 a/cm2
Q. When the electrolyte flow is low, what happens to the current efficiency?
a. increases
b. decreases
c. remains same
d. increase and then decrease
Q. When machining Ti, in Nacl electrolyte, what values of current efficiencies are obtained?
a. 10 – 20 %
b. 20 – 30 %
c. 30 – 50 %
d. 50 – 80 %
Q. Surface roughness depend on which of the following quantities?
a. crystallographic irregularities
b. alloy composition
c. distribution of current density
d. all of the mentioned
Q. For a better surface finish, which type of current distribution is required?
a. even
b. uneven
c. even & uneven
d. none of the mentioned
Q. Between which values does the side gap’s surface roughness vary?
a. >1 µm
b. >3 µm
c. >5 µm
d. >7 µm
Q. In Electrochemical machining, larger grain size causes which type of finish?
a. smoother
b. rougher
c. finer
d. all of the mentioned
Q. Which type of gap width is necessary for a higher degree of accuracy?
a. very small
b. small
c. medium
d. high
Q. Accuracy of machining is affected by, which of the following factors?
a. material
b. gap voltage
c. feed rate
d. all of the mentioned
Q. Which properties of electrolyte does not affect the accuracy of the process?
a. temperature
b. concentration
c. non-reactive
d. pressure
Q. For high process accuracy, which of the following factors are needed?
a. high feed rate
b. high conductivity
c. high feed rate & high conductivity
d. none of the mentioned