Advanced Machining Questions and Answers – ECM-Applications and Micro-ECM

This set of Advanced Machining Processes Multiple Choice Questions & Answers (MCQs) focuses 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
View Answer

Answer: d
Explanation: 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
View Answer

Answer: d
Explanation: 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
View Answer

Answer: c
Explanation: ECM can be used for machining high strength alloys and hardened steels which led to many cost-saving applications.
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4. ECM is used to _________ the sharp edges produced after rough cuts.
a) Enhance
b) Dull
c) Improve
d) None of the mentioned
View Answer

Answer: b
Explanation: 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
View Answer

Answer: b
Explanation: ECM is usually characterized as low accuracy machining because of its wider machining gap.
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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
View Answer

Answer: a
Explanation: 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
View Answer

Answer: b
Explanation: Micro ECM is used to machine micro parts which can be from micro scale to mesoscale in size.
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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
View Answer

Answer: c
Explanation: Indentation and cavitation can be done using micro ECM by moving the work piece or switching the pulse current.

Sanfoundry Global Education & Learning Series – Advanced Machining.

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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]

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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