Category: POWER SYSTEM PROTECTION

Q.46 Which of the following requirement is must for reliable normal operation of electrical apparatus?     A. Rated current ≥ Actual load current     B. Rated voltage ≥ working voltage     C. Both A and B     D. Rated current Read More …

Q.31 In circuit breaker, if the dielectric strength of the medium between two contacts build up more rapidly than the restriking voltage___     A. the arc will continue and current cannot be interrupted     B. the arc will fail to Read More …

Q.17 When the contacts of a circuit breaker are opened under abnormal condition,_____     A. sparking between the contacts     B. arc is struck between the contacts     C. contacts remains in closed position     D. isolators on both the Read More …

Q.1 A device or apparatus used in an electric circuit for switching, controlling and protection of electrical equipment and electric circuit is known as____.     A. circuit breaker     B. relay     C. switchgear     D. fuse Ans.: C Q.02 Read More …