Q.1.
The impulse ratio of a rod gap is:
Q.2.
What are the isolation requirements for a hot water heater?
Q.3.
What are the requirements for the installation of an isolation switch for an electric space heater?
Q.4.
How do you determine the minimum interrupting capacity rating of a motor isolator switch if it is installed directly in the motor supply circuit?
Q.5.
What are the requirements for installing isolation switches for fire pumps?
Q.6.
How should a MIMS cable be connected to a motor that is subject to vibration?
Q.7.
For the protection of power station buildings against direct strokes the requirements are
Q.8.
How should floor heating cables be installed?
Q.9.
What is the minimum rating of a motor that would require overload protection?
Q.10.
When any material has negative magnetism, the material is called as
Q.11.
The hysteresis losses do not depend on
Q.12.
Permeability in the magnetic circuit is analogous to
Q.13.
The current transformer can also be used to measured high d.c. current.
Q.14.
An SF6 circuit breaker uses______________ gas as a dielectric medium in the interrupting unit.
Q.15.
True or False?If the circuit breaker opens onto a faulty circuit it receives an immediate trip signal from the protection, which causes it to trip.
Q.16.
________________circuit breakers use oil as the dielectric medium in the interrupting unit. The arc interrupter is a confined space where the arc always burns inside of a gas bubble.
Q.17.
The breaker is completely off the bus and disconnected from the secondary disconnect. Which position is this called?
Q.18.
_______________circuit breakers uses air as the dielectric medium in the interrupting unit
Q.19.
What does MCC stand for ?
Q.20.
Switchgears are provided with___________ to ensure a proper and safe operating sequence to prevent danger to personnel or damage to nearby or associated equipment