Top 550+ Solved Unconventional Machine Process (UMP) MCQ Questions Answer
Q. Tool insulation that the side machining action is needed in the process of ECM.
a. limits
b. enhances
c. maintains
d. none of the mentioned
Q. If the current density is high as required, what type of machining occurs?
a. pitting
b. polishing
c. etching
d. all of the mentioned
Q. What happens when the current density is low in ECM?
a. pitting occurs
b. etching occurs
c. pitting & etching occurs
d. none of the mentioned
Q. Fine dimensional control can be obtained if throwing power of electrolyte is
a. low
b. medium
c. high
d. very high
Q. Passivation is done on electrolytes in order to form which of the following?
a. passive layer on machined parts
b. passive layer on cathode
c. passive layer on machined parts & cathode
d. none of the mentioned
Q. If there is an increase in the electrolyte flow, what happens to the rate of film formation?
a. increases
b. decreases
c. remains same
d. all of the mentioned
Q. It is difficult to machine inner radii smaller than and outer radii less than
a. 0.1 mm, 0.2 mm
b. 0.5 mm, 0.8 mm
c. 0.8 mm, 0.5 mm
d. 0.2 mm, 0.1 mm
Q. What is the value of the overcut that is obtained using ECM?
a. 0.3 mm
b. 0.5 mm
c. 0.7 mm
d. 0.9 mm
Q. If there is a change in the selected machining conditions, it will have impact on which of the following?
a. process accuracy
b. surface finish
c. process accuracy & surface finish
d. none of the mentioned
Q. Surface roughness depends on current density, which is affected by which of the following?
a. tool feed rate
b. gap voltage
c. work piece material
d. all of the mentioned
Q. Machining conditions leading to high accuracy are associated with surface roughness and productivity.
a. greater, greater
b. smaller, greater
c. greater, smaller
d. smaller, smaller
Q. Non stationary behaviour of ECM is due to, which of the factors below?
a. gas generation
b. heating
c. passivation
d. all of the mentioned
Q. For large components, actual machining time constitutes to how much percentage of the total machining time?
a. very low
b. low
c. medium
d. high
Q. What happens to the product cycle time, if the machining performance is improved?
a. increases
b. decreases
c. remains same
d. none of the mentioned
Q. The cost of additional control hardware remain a fraction of total machining cost.
a. small
b. large
c. equal
d. none of the mentioned