Top 550+ Solved Unconventional Machine Process (UMP) MCQ Questions Answer
Q. Which of the following factors influence the material removal rate?
a. pulse condition
b. electrode polarity
c. machining medium
d. all of the mentioned
Q. In Electro discharge machining, materials with low melting point have which type of material removal rate?
a. very low
b. low
c. medium
d. high
Q. In Electro discharge machining, materials with low melting point have which type of surface roughness?
a. rough
b. smooth
c. fine
d. all of the mentioned
Q. What happens to the material removal rate if the sparks are very less in EDM?
a. decreases
b. increases
c. increase and then decrease
d. all of the mentioned
Q. What is the relation between the melting point and the material removal rate?
a. directly proportional
b. inversely proportional
c. indirectly proportional
d. none of the mentioned
Q. What happens to the crater size if we increase the current keeping the pulse time constant?
a. increase
b. decrease
c. decrease and increase
d. none of the mentioned
Q. What happens to the crater size if we decrease the pulse time keeping the current constant?
a. increase
b. decrease
c. increase and decrease
d. none of the mentioned
Q. On which of the following factors do the craters depend?
a. physical properties
b. mechanical properties
c. composition of medium
d. all of the mentioned
Q. The maximum depth of damaged layer is how many times that of average surface roughness?
a. 1.5 time
b. 2 times
c. 2.5 times
d. 3 times
Q. What happens to the surface roughness values if the MRR increases in EDM?
a. increases
b. decreases
c. decrease and increase
d. none of the mentioned
Q. In Electro discharge machining, what happens to the surface finish if the pulse energy is decreased?
a. reduces
b. decreases
c. improves
d. none of the mentioned
Q. Using of a mate electrode in Electro discharge machining the surface roughness of material.
a. increases
b. decreases
c. enhances
d. none of the mentioned
Q. What happens to the surface roughness if oxygen gas is introduced in the gap?
a. increases
b. decreases
c. decrease and then increase
d. all of the mentioned
Q. What are the tolerance values obtained by machining using EDM?
a. ± 10 mm
b. ± 15 mm
c. ± 25 mm
d. ± 40 mm
Q. How much extra tolerances are achieved when we choose proper variables?
a. ± 5 mm
b. ± 10 mm
c. ± 15 mm
d. ± 20 mm