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Q. |
What is the normal pressure at which the SF6 gas is maintained in the closed position of the breaker? |
A. | 2 kg / cm2 |
B. | 2.5 kg /cm2 |
C. | 2.8 kg / cm2 |
D. | 3 kg / cm2 |
Answer» C. 2.8 kg / cm2 |
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