Computer Science Fundamentals System Design Objective
May 13, 2013

In a vacuum circuit breaker, the vacuum is of the order of__________?

Choose the correct answer:
A) 10mm Hg
B) 10-2mmHg
C) l0-6 mmHg
D) 10-9mmHg.
Detailed Explanation

Otion D is the right answer.

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