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What is the value of diameter-to-depth ratio obtained using ECJD process?

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What is the value of diameter-to-depth ratio obtained using ECJD process?

(a) 1:10

(b) 2:25

(c) 1:12

(d) 1:100

The question was asked in an online interview.

The above asked question is from Electrochemical Jet Drilling topic in portion Electrochemical Processes of Advanced Machining

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The correct answer is (c) 1:12

The explanation is: Electrochemical jet drilling is the process used for producing fine holes, having diameter to depth ratio of 1:12.

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