Q.1
Wave trap is used to trap waves of
Q.2
SF6 gas
Q.3
The fuse wire, in D.C. circuits, is inserted in
Q.4
The main function of a fuse is to
Q.5
The information to the circuit breaker under fault conditions is provided by
Q.6
H.R.C. fuses provide best protection against
Q.7
Air blast circuit breakers for 400 kV power system are designed to operate in
Q.8
Series reactors should have
Q.9
Insulation resistance of high voltage circuit breakers is more than
Q.10
An efficient and a well designed protective relaying should have
Q.11
Distance relays are generally
Q.12
In a single bus-bar system there will be complete shut down when
Q.13
A differential relay measures the vector difference between
Q.14
The power loss is an important factor for the design of
Q.15
For which of the following protection from negative sequence currents is provided ?
Q.16
A switchgear is device used for
Q.17
With which of the following, a circuit breaker must be equipped for remote operation ?
Q.18
The single phasing relays are used for the protection of
Q.19
The contacts of high voltage switches used in power system are submerged in oil. The main purpose of the oil is to
Q.20
A _______ is used to measure the stator % winding temperature of the generator.
Q.21
To limit short-circuit current in a power system are used
Q.22
Series capacitors are used to
Q.23
Large internal faults are protected by
Q.24
The short circuit in any winding of the transformer is the result of
Q.25
The arc voltage produced in A.C. circuit breaker is always
Q.26
Circuit breakers are essentially
Q.27
The relay operating speed depends upon
Q.28
The fuse blows off by
Q.29
For which of the following ratings of the transformer differential protection is recommended ?
Q.30
When a wave propagates on a transmission line, it suffers reflection several times at
0 h : 0 m : 1 s