Pressure of air in air blast circuit breakers is usually
A. 1 to 5 kg/cm2
B. 5 to 10 kg/cm2
C. 10 to 30 kg/cm2
D. 35 to 100 kg/cm2
Answer:C
Pressure of air in air blast circuit breakers is usually
A. 1 to 5 kg/cm2 B. 5 to 10 kg/cm2 C. 10 to 30 kg/cm2 D. 35 to 100 kg/cm2