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The fuse wire, in D.C. circuits, is inserted in
Both of the listed here
none of the listed here
positive circuit only
negative circuit only
Both of the listed here
none of the listed here
positive circuit only
negative circuit only
Answer
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Arc in a circuit breaker is interrupted at
minimum voltage
zero current
maximum current
maximum voltage
minimum voltage
zero current
maximum current
maximum voltage
Answer
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Which of the following circuit breakers is prefered for EHT applications ?
bulk oil circuit breaker
air break circuit breaker
low oil circuit breaker
Sf6 CB
bulk oil circuit breaker
air break circuit breaker
low oil circuit breaker
Sf6 CB
Answer
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Overheating of relay contacts or contact born out is due to
foreign matter on the contact surface
slow making and breaking of load circuit contacts
all of these
too low contact pressure
foreign matter on the contact surface
slow making and breaking of load circuit contacts
all of these
too low contact pressure
Answer
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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 A
750 A
1500/√3 A
None of these
1500 A
750 A
1500/√3 A
None of these
Answer
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A.C. network analyzer is used to solve problems of
Load flow and stability
Load flow, short-circuit and stability
Load flow
Load flow and short-circuit
Load flow and stability
Load flow, short-circuit and stability
Load flow
Load flow and short-circuit
Answer
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