Q.1.
Oil switches are employed for
Q.2.
Which of the following circuit breakers has high reliability and minimum maintenance ?
Q.3.
By which of the following methods major portion of the heat generated in a H.R.C. fuse is dissipated ?
Q.4.
Relays are used for phase faults on long line.
Q.5.
Relays can be designed to respond to changes in
Q.6.
Fault diverters are basically
Q.7.
Ionization in circuit breaker is facilitated by
Q.8.
On which of the following effects of electric current a fuse operates?
Q.9.
In order that current should flow without causing excessive heating or voltage drop, the relay contacts should
Q.10.
Shunt capacitance is neglected while considering
Q.11.
Which of the following parameter can be neglected for a short line?
Q.12.
Induction cup relay is operated due to changes in
Q.13.
Ungrounded neutral transmission system is not recommended because of system
Q.14.
The delay fuses are used for the protection of ________ .
Q.15.
Overload relays are of type.
Q.16.
A balanced 3-phase system consists of
Q.17.
The line insulation is the insulation level of the station equipment.
Q.18.
Burden of a protective relay is the power
Q.19.
What will be the reflection co-efficient of the wave of load connected to transmission line if surge impedance of the line is equal to load ?
Q.20.
The torque produced in induction type relay (shaded pole structure) is
Q.21.
The material used for fuse must have
Q.22.
The voltage appearing across the contacts after opening of the circuit breaker is called______voltage.
Q.23.
Admittance relay is _______ relay.
Q.24.
Directional relays are based on flow of
Q.25.
Protection by fuses is generally not used beyond
Q.26.
A fuse is connected
Q.27.
Arc in a circuit behaves as
Q.28.
The inverse definite mean time relays are used for over current and earth fault protection of transformer against
Q.29.
The relay with inverse time characteristic will operate within
Q.30.
Thermal overload relays are used to protect the motor against over current due to