Top 550+ Solved Unconventional Machine Process (UMP) MCQ Questions Answer
Q. Other non-conventional processes lay behind Laser beam machining in drilling process because of which factors below?
a. high cost
b. long lead times
c. low machining speeds
d. all of the mentioned
Q. Laser drilling has proven to be more efficient in which of the following factors?
a. cost
b. quality
c. reliability
d. all of the mentioned
Q. Which of the following are different laser drilling processes in Laser beam machining?
a. direct drilling
b. drill and ream
c. trepanning
d. all of the mentioned
Q. The hole size in direct drilling depend up on which of the factors below?
a. input power
b. focusing adjustments
c. input power & focusing adjustments
d. none of the mentioned
Q. Which method mentioned below is used for drilling of large size holes?
a. direct drilling
b. drill and ream
c. trepanning
d. all of the mentioned
Q. What is the depth-to-diameter ratio obtained in drilling process using Laser beam machining?
a. 10:1
b. 20:1
c. 50:1
d. 80:1
Q. What is the maximum value of drilling depth in trepanning method of laser drilling process?
a. 1.7 mm
b. 4.3 mm
c. 6.4 mm
d. 7.9 mm
Q. What is the value of minimum corner radius obtained by drilling in Laser beam machining?
a. 0.10 mm
b. 0.25 mm
c. 0.50 mm
d. 0.65 mm
Q. Peak power should be increased in Laser drilling process by pulse energy.
a. increasing
b. decreasing
c. reducing
d. constant
Q. Drilling of holes with larger pulse duration causes which effect to the holes produced?
a. enlarge holes
b. reduce hole size
c. decrease the depth
d. all of the mentioned
Q. pulse energy and pulse duration are suitable for drilling.
a. low, short
b. low, long
c. high, short
d. high, long
Q. Which of the following are the functions of assist gases?
a. removal of molten material
b. shield the lenses
c. better efficiency
d. all of the mentioned
Q. Selection of assist gas depends on which of the following properties of work piece?
a. material
b. thickness
c. material & thickness
d. none of the mentioned
Q. Which of the following properties of material affect the quality of holes obtained?
a. reflectivity
b. absorption coefficient
c. thermal conductivity
d. all of the mentioned