1. In chemical machining is material removal takes by?
a) Chemical reaction
b) Erosion
c) Electron removal
d) None of the mentioned
Explanation: Chemical machining removes material by chemical reactions.
2. Which of the following is an example of hybrid machining?
a) Ultrasonic Machining
b) Electron Beam Machining
c) Ultrasonic assisted electrochemical machining
d) Laser Beam Machining
Explanation: More than one phase is used to combine to form hybrid machining
3. Who discovered USM?
a) Balamuth
b) Paul O Flawer
c) Turing
d) Steve John
Explanation: Balamuth was the scientist, who discovered Ultrasonic Machining.
4. 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
Explanation: Full form of USM in advanced machining processes, is Ultrasonic machining
5. USM removes materials using the ____________ tool.
a) Perpendicularly rotating
b) Perpendicularly oscillating
c) Axially oscillating
d) Inclined oscillating
Explanation: Material is removed using axial oscillating tool.
6. Which is softer material in USM?
a) Tool
b) Work piece
c) Tool & Work piece
d) None of the mentioned
Explanation: Tool is softer than work piece in USM
7. 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
Explanation: Frequency used in USM is between 18 – 20 kHz.
8. 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
Explanation: The optimal range used is between 10-40 μm.
9. In which year, discovery of USM took place?
a) 1910
b) 1925
c) 1943
d) 1945
Explanation: Ultrasonic Machining was discovered in 1945.
10. The machining system of USM contains which of the following components?
a) Magnetostrictor
b) Concentrator
c) Tools and slurry
d) All of the mentioned
Explanation: In machining system of USM, the above-mentioned components have to be present.