250+ TOP MCQs on Ultrasonic Machining – Introduction and Answers

Advanced Machining Processes Multiple Choice Questions on “Ultrasonic Machining – Introduction”.

1. Who discovered USM?
a) Balamuth
b) Paul O Flawer
c) Turing
d) Steve John
Answer: a
Clarification: Balamuth was the scientist, who discovered Ultrasonic Machining.

2. What is the full form of USM in advanced machining process?
a) Ultrasound manufacturing
b) Ultrasonic machining
c) UV spectrum manufacturing
d) Ultra sonar machining
Answer: b
Clarification: Full form of USM in advanced machining processes, is Ultrasonic machining.

3. USM removes materials using the ____________ tool.
a) Perpendicularly rotating
b) Perpendicularly oscillating
c) Axially oscillating
d) Inclined oscillating
Answer: c
Clarification: Material is removed using axial oscillating tool.

4. Which is softer material in USM?
a) Tool
b) Work piece
c) Tool & Work piece
d) None of the mentioned
Answer: a
Clarification: Tool is softer than work piece in USM.

5. Frequency of tool’s oscillation in USM ranges between ________
a) 5-10 kHz
b) 10-15 kHz
c) 18-20 kHz
d) 25-50 kHz
Answer: c
Clarification: Frequency used in USM is between 18 – 20 kHz.

6. Amplitude of oscillation of tool in USM ranges between ________
a) 0.1-10 μm
b) 10-40 μm
c) 50-100 μm
d) 100-1000 μm
Answer: b
Clarification: The optimal range used is between 10-40 μm.

7. In which year, discovery of USM took place?
a) 1910
b) 1925
c) 1943
d) 1945
Answer: d
Clarification: Ultrasonic Machining was discovered in 1945.