250+ TOP MCQs on ECM-Applications and Micro-ECM and Answers

Advanced Machining Processes Multiple Choice Questions & Answers (MCQs) on “ECM-Applications and Micro-ECM”.

1. Which of the following use ECM for different applications?
a) Gas turbines
b) Jet engines
c) Bio medical implants
d) All of the mentioned
Answer: d
Clarification: ECM has its applications in industries such as gas turbines, jet engines, automobiles, medical etc.

2. Which of the following processes can be done using ECM?
a) Die sinking
b) Profiling and contouring
c) Drilling and trepanning
d) All of the mentioned
Answer: d
Clarification: ECM can be used for die sinking, trepanning, drilling, contouring, grinding and profiling.

3. Which of the following material cannot be machined using ECM?
a) High strength alloys
b) Hardened steels
c) Nonconductive materials
d) All of the mentioned
Answer: c
Clarification: ECM can be used for machining high strength alloys and hardened steels which led to many cost-saving applications.

4. ECM is used to _________ the sharp edges produced after rough cuts.
a) Enhance
b) Dull
c) Improve
d) None of the mentioned
Answer: b
Clarification: Using deburring process through ECM, sharp edges are dulled, which are produced after rough cuts.

5. ECM is usually characterized as low accuracy machining, for which of the following reason?
a) Narrow gap width
b) Wider gap width
c) High current densities
d) All of the mentioned
Answer: b
Clarification: ECM is usually characterized as low accuracy machining because of its wider machining gap.

6. In micro ECM, which of the following is used as micro tool?
a) Electrolyte jet
b) Electrodes
c) Power supply
d) All of the mentioned
Answer: a
Clarification: Electrolyte jet in micro ECM acts as the micro tool for machining.

7. Micro ECM is used to machine which type of parts?
a) Large parts
b) Micro parts
c) Normal sized parts
d) All of the mentioned
Answer: b
Clarification: Micro ECM is used to machine micro parts which can be from micro scale to mesoscale in size.

8. Which of the following produces small indents and cavities using micro ECM?
a) Moving the work piece
b) Switching the pulse current
c) Moving the work piece & Switching the pulse current
d) None of the mentioned
Answer: c
Clarification: Indentation and cavitation can be done using micro ECM by moving the work piece or switching the pulse current.