Top 550+ Solved Unconventional Machine Process (UMP) MCQ Questions Answer
Q. What is the maximum thickness of the walls of tube machined using plasma arc?
a. 10 mm
b. 30 mm
c. 50 mm
d. 70 mm
Q. Which of the following are the advantages of PBM?
a. no chemical
b. less harmful
c. operates cleanly
d. all of the mentioned
Q. Which of the following chemicals are used in PBM?
a. harmful chlorinated fluorocarbons
b. acid cleaning chemicals
c. dissolvable solvent chemicals
d. none of the mentioned
Q. How much amount of energy is required for machining using PBM?
a. low
b. moderate
c. high
d. very high
Q. What are the disadvantages of PBM?
a. large power supplies
b. heat produced
c. toxic fumes produced
d. all of the mentioned
Q. What is the full form of EBM in the advanced machining processes?
a. electro blast manufacturing
b. electron beam machining
c. electron beam manufacturing
d. electron blast manufacturing
Q. Which of the following are the applications of EBM process?
a. drilling
b. cutting
c. engraving
d. all of the mentioned
Q. What are the values of currents used in EBM process?
a. 1 and 20 ma
b. 20 and 100 ma
c. 100 and 200 ma
d. 200 and 400 ma
Q. What are the values of current densities used in the process of EBM?
a. 5 and 15 a/cm2
b. 15 and 20 a/cm2
c. 20 and 30 a/cm2
d. 40 and 60 a/cm2
Q. Emission current depends up on which of the following factors?
a. cathode material
b. temperature
c. voltage supply
d. all of the mentioned
Q. Which of the following lenses are used for refocussing the electrons in EBM process?
a. magnetic lens
b. electronic lens
c. magnetic & electronic lens
d. none of the mentioned
Q. What are the values of power densities used in the EBM process?
a. 0.05 mw/mm2
b. 0.55 mw/mm2
c. 1.55 mw/mm2
d. 2.55 mw/mm2
Q. What is the frequency of the pulse of electrons used in EBM process?
a. 10 hz
b. 102 hz
c. 103 hz
d. 104 hz
Q. What are the values of material removal rates in EBM process?
a. 1 mm3/min
b. 10 mm3/min
c. 100 mm3/min
d. 1000 mm3/min