Q.1.
Arc in a circuit behaves as
Q.2.
Overload relays are of type.
Q.3.
Ionization in circuit breaker is facilitated by
Q.4.
Arc in a circuit breaker is interrupted at
Q.5.
Admittance relay is _______ relay.
Q.6.
The voltage appearing across the contacts after opening of the circuit breaker is called______voltage.
Q.7.
The material used for fuse must have
Q.8.
A fuse is connected
Q.9.
The reflection co-efficient at the open circuited end of a transmission line.
Q.10.
Protection by fuses is generally not used beyond
Q.11.
H.R.C. fuse, as compared to a rewirable fuse, has
Q.12.
The inverse definite mean time relays are used for over current and earth fault protection of transformer against
Q.13.
Which of the following devices will receive voltage surge first travelling on the transmission line ?
Q.14.
For cost and safety, the outdoor substations are installed for voltages above
Q.15.
The ground wire should not be smaller than No ______ copper.
Q.16.
The relay with inverse time characteristic will operate within
Q.17.
H.R.C. fuse, as compared to a rewirable fuse, has
Q.18.
Overfluxing protection is recommended for
Q.19.
Over voltage protection is recommended for
Q.20.
The short circuit in any winding of the transformer is the result of
Q.21.
Which of the following is the least expensive protection for overcurrent is low voltage system ?
Q.22.
Circuit breakers are essentially
Q.23.
The arc voltage produced in A.C. circuit breaker is always
Q.24.
A fuse is never inserted in
Q.25.
Protective relays are devices that detect abnormal conditions in electrical circuits by measuring
Q.26.
Which of the following medium is employed for extinction of arc in air circuit breaker ?
Q.27.
When a wave propagates on a transmission line, it suffers reflection several times at
Q.28.
The fuse blows off by
Q.29.
The relay operating speed depends upon
Q.30.
If the fault occurs near the impedance relay, the VII ratio will be