 
			 
			MCQOPTIONS
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				| 1. | What is the duration of sparks that are produced in Electro discharge machining? | 
| A. | 0.001 – 1 µs | 
| B. | 0.1 – 2000 µs | 
| C. | 0.2 – 100 ms | 
| D. | 100 – 2000 ms | 
| Answer» C. 0.2 – 100 ms | |