Switchgear protections questions with answers
93 multiple-choice questions. Open any question for its answer and explanation.
- Distance relays are generally
- Arc in a circuit behaves as
- A transmission line is protected by
- By which of the following methods major portion of the heat generated in a H.R.C. fuse is dissipated ?
- When a transmission line is energized, the wave that propagates on it is
- The fuse rating is expressed in terms of
- Ionization in circuit breaker is facilitated by
- 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 ?
- A short-circuit is identified by
- The main function of a fuse is to
- Overfluxing protection is recommended for
- H.R.C. fuses provide best protection against
- The fuse blows off by
- In a single bus-bar system there will be complete shut down when
- Which of the following medium is employed for extinction of arc in air circuit breaker ?
- The relay operating speed depends upon
- A _______ is used to measure the stator % winding temperature of the generator.
- Resistance grounding is used for voltage between
- Admittance relay is _______ relay.
- Series capacitors are used to
- When a wave propagates on a transmission line, it suffers reflection several times at
- Ungrounded neutral transmission system is not recommended because of system
- D.C. shunt relays are made of
- To protect most of the electrical equipment handling low power, the types of relays used are
- A fuse in a motor circuit provides protection against