A) Minimum oil circuit breaker B) SF6 gas circuit breaker C) Vacuum circuit breaker D) Bulk oil circuit breaker. Ans : (B)
A) 3 to 8 B) 10 to 18 C) 20 to 30 D) 40 to 50. Ans : (A)
A) Copper B) Lead C) Silver D) Aluminium. Ans : (C)
A) recovery current B) breaking current C) surge current D) restriking current. Ans : (B)
A) decrease B) remain unaltered C) increase exponentially D) increase linearly Ans : (A)
A) current flowing B) contact resistance C) temperature of the surrounding medium D) time during which the current flows. Ans : (C)
A) MVA B) MW C) Volts D) Amperes. Ans : (A)
A) 50 micro seconds B) 50 milli seconds C) 500 milli seconds D) 50 seconds. Ans : (B)
A) square law characteristics B) linear characteristics C) inverse characteristics D) none. Ans : (C)
A) alternators B) transformers C) feeders D) transmission lines. Ans : (A)