This set of Advanced Machining Processes Multiple Choice Questions & Answers (MCQs) focuses on “USM – Dimensional Accuracy and Surface Quality”.
1. Which of the following distribution factors, does not affect the machining parts?
a) Side wear of tool
b) Abrasive wear
c) Accurate feed
d) Form error of tool
View Answer
Explanation: Inaccurate feed is the factor that affects the accuracy of machining parts.
2. Which one of the following factors affects the accuracy of parts?
a) Steady abrasive flow
b) Accurate feed
c) Unsteady abrasive flow
d) Ultrasonic frequency
View Answer
Explanation: Unsteady and uneven abrasive flow affects the dimensional accuracy.
3. State whether the statement is true or false.
“Hole oversize measures the difference between hole diameter measured at the bottom surface, and the tool diameter.”
a) True
b) False
View Answer
Explanation: Oversize measures the difference of the hole diameter measured at top surface.
4. While machining W4C and glass, tool over cut size when compared to mean grain size is?
a) Two times greater
b) Two times smaller
c) Three times greater
d) Three times smaller
View Answer
Explanation: Tool over cut size is 2 or 4 times greater than mean grain size.
5. While machining B4C, tool over cut size when compared to mean grain size is?
a) Two times greater
b) Two times smaller
c) Three times greater
d) Three times smaller
View Answer
Explanation: Tool over cut is 3 times greater than mean grain size while machining B4C.
6. In the following USM accuracy levels are limited to which value?
a) ± 0.01 mm
b) ± 0.05 mm
c) ± 0.10 mm
d) ± 0.50 mm
View Answer
Explanation: In Ultrasonic Machining the dimensional accuracy levels are limited to ± 0.05mm.
7. Conicity resulting after machining by Ultrasonic Machining can be reduced by?
a) Direct injection of slurry
b) Tools having negative taper
c) High static pressure
d) All of the mentioned
View Answer
Explanation: Conicity can be reduced by above means and also by using wear resistant tools, finer abrasive particles etc.
8. Typical roundness error in graphite, resulted due to lateral vibrations is between?
a) 01 – 20 μm
b) 20 – 60 μm
c) 60 – 100 μm
d) 100 – 150 μm
View Answer
Explanation: The roundness is between 20 – 60 μm while machining graphite by Ultrasonic Machining.
9. Typical roundness error in glass, resulted due to lateral vibrations is between?
a) 01 –20 μm
b) 20 – 40 μm
c) 40 – 140 μm
d) 150 – 250 μm
View Answer
Explanation: The roundness is between 40 – 140 μm while machining graphite by Ultrasonic Machining.
10. Which of the following factors affect the surface finish of machined parts in Ultrasonic Machining?
a) Amplitude
b) Material
c) Tool surface
d) All of the mentioned
View Answer
Explanation: The above factors influence the surface quality of the machined parts in Ultrasonic Machining very significantly.
11. What is value of surface finish achieved, when we use the abrasive of grit number 240?
a) 0.01 – 0.08 μm
b) 0.08 – 0.13 μm
c) 0.13 – 0.25 μm
d) 0.25 – 0.38 μm
View Answer
Explanation: The surface roughness obtained, when machined using abrasive of grit number 240, is between 0.25 – 0.38 μm.
12. When the viscosity of liquid carrier is increased, the surface quality of the parts?
a) Increased
b) Decreased
c) Remained same
d) None of the mentioned
View Answer
Explanation: As the viscosity of the liquid carriers reduces we can obtain smoother surfaces.
Sanfoundry Global Education & Learning Series – Advanced Machining.
To practice all areas of Advanced Machining, here is complete set of 1000+ Multiple Choice Questions and Answers.
If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]
- Practice Mechanical Engineering MCQs
- Check Advanced Machining Processes Books
- Apply for Mechanical Engineering Internship
- Check Mechanical Engineering Books
