1
GATE EE 2003
MCQ (Single Correct Answer)
+1
-0.3
The interrupting time of a circuit breaker is the period between the instant of
A
Initiation of short circuit and the arc extinction on an opening operation
B
Energizing of the trip circuit and the arc extinction on an opening operation
C
Initiation of short circuit and the parting of primary arc contacts
D
Energizing of the trip circuit and the parting of primary arc contacts
2
GATE EE 1999
MCQ (Single Correct Answer)
+1
-0.3
Three sections of a feeder are provided with circuit breakers CB1, CB2, CB3, CB4, CB5 and CB6. For a fault F as indicated in figure. GATE EE 1999 Power System Analysis - Circuit Breaker Question 6 English
A
CB5 must be set to trip after CB1 trips.
B
CB5 must be set to trip after CB3 and CB4 trips.
C
CB5 must be set to trip after CB2 trip.
D
CB5 must be set to trip before CB1, CB2, CB3 and CB4 trip.
3
GATE EE 1997
MCQ (Single Correct Answer)
+1
-0.3
The use of high-speed of circuit-breakers
A
Reduces the short circuit current
B
Improves system stability
C
Decreases system stability
D
Increases the short circuit current
4
GATE EE 1996
MCQ (Single Correct Answer)
+1
-0.3
Resistance switching is normally employed in
A
All breakers
B
Bulk oil breakers
C
Minimum oil breakers
D
Air blast circuit breakers
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