Switch Gear Overheating of relay contacts or contact born out is due to foreign matter on the contact surface too low contact pressure slow making and breaking of load circuit contacts all of these foreign matter on the contact surface too low contact pressure slow making and breaking of load circuit contacts all of these ANSWER DOWNLOAD EXAMIANS APP
Switch Gear The fuse wire, in D.C. circuits, is inserted in positive circuit only Both of the listed here none of the listed here negative circuit only positive circuit only Both of the listed here none of the listed here negative circuit only ANSWER DOWNLOAD EXAMIANS APP
Switch Gear Which of the following circuit breakers is prefered for EHT applications ? Sf6 CB air break circuit breaker low oil circuit breaker bulk oil circuit breaker Sf6 CB air break circuit breaker low oil circuit breaker bulk oil circuit breaker ANSWER DOWNLOAD EXAMIANS APP
Switch Gear A fuse is never inserted in negative of dc circuit neutral wire positive of dc circuit phase line negative of dc circuit neutral wire positive of dc circuit phase line ANSWER DOWNLOAD EXAMIANS APP
Switch Gear The making capacity of a circuit breaker is equal to 2.55 × symmetrical breaking capacity √3 × symmetrical breaking capacity None of these √2 × symmetrical breaking capacity 2.55 × symmetrical breaking capacity √3 × symmetrical breaking capacity None of these √2 × symmetrical breaking capacity ANSWER DOWNLOAD EXAMIANS APP
Switch Gear A circuit breaker is rated as 1500 A, 1000 MVA, 33 kv, 3-second , 3- phase oil circuit breaker. The rated normal current is 1500/√3 A None of these 1500 A 750 A 1500/√3 A None of these 1500 A 750 A ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS