In air-blast circuit breakers, the pressure of the air is of the order – McqOptions

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1.	In air-blast circuit breakers, the pressure of the air is of the order of:
A.	100 mm Hg
B.	1 kg / cm2
C.	20 kg / cm2 to 30 kg / cm2
D.	200 kg / cm2 to 300 kg / cm2
Answer» D. 200 kg / cm2 to 300 kg / cm2

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