A. 1 mega ohms
B. 10 mega ohms
C. 100 mega ohms
D. 500 mega ohms
A. delayed trip action
B. instantaneous trip action
C. both of the above
D. none of the above
A. recovery
B. surge
C. operating
D. arc
E. none of the above
A. high temperature
B. increase of mean free path
C. increasing field strength
D. all of the above
A. lubricate the contacts
B. insulate the contacts from switch body
C. extinguish the arc
D. all of the above
E. none of the above
A. negative circuit only
B. positive circuit only
C. both (A) and (B)
D. either (A) or (B)
A. interrupting an electrical circuit
B. switching an electrical circuit 111.
C. switching and controlling an electrical circuit
D. switching, controlling and protecting the electrical circuit and equipment