Q.1
The impulse ratio of a rod gap is:
  • Unity
  • Between 1.5 and 2.3
  • Between 1.6 and 1.8
  • Between 2 and 2.2.
Q.2
What are the isolation requirements for a hot water heater?
  • 4.8.2.3
  • 4.8.1
  • 2.5.3
  • None of these
Q.3
What are the requirements for the installation of an isolation switch for an electric space heater?
  • 4.9
  • 2.10
  • 2.10.1
  • 4.9.2
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?
  • 4.13
  • 4.12.1.3
  • 4.13.1.2
  • None of these
Q.5
What are the requirements for installing isolation switches for fire pumps?
  • 7.2.5.6.1
  • 7.1
  • 5.3.5
  • 10.2
Q.6
How should a MIMS cable be connected to a motor that is subject to vibration?
  • 3.9.7.3.b
  • 3.9
  • 3.8
  • None of these
Q.7
For the protection of power station buildings against direct strokes the requirements are
  • (a) interception,
  • (b) interception and conduction,
  • (c) interception, conduction and dissipation
  • (d) interception, conduction, dissipation and reflection
Q.8
How should floor heating cables be installed?
  • 4.10.21
  • 4.13.1.2
  • 4.10.2
  • None of these
Q.9
What is the minimum rating of a motor that would require overload protection?
  • 4.13.1.2
  • 4.13.2
  • Both A & B
  • None of these
Q.10
When any material has negative magnetism, the material is called as
  • Paramagnetic
  • Diamagnetic
  • Ferromagnetic
  • Antiferromagnetic
Q.11
The hysteresis losses do not depend on
  • Volume of material
  • Magnetic field
  • Frequency
  • Either of them
  • None of these
Q.12
Permeability in the magnetic circuit is analogous to
  • Resistance in electrical circuit
  • Resistivity in electrical circuit
  • Conductivity in electrical circuit
  • Current density
  • None of the above
Q.13
The current transformer can also be used to measured high d.c. current.
  • true
  • false
Q.14
An SF6 circuit breaker uses______________ gas as a dielectric medium in the interrupting unit.
  • Sulfur Hexaflouride (SF6)
  • Sulfur Hexaflouride (SF5)
  • Sulfur Hexaflouride (SF3)
  • Sulfur Hexaflouride (SF9)
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.
  • True
  • False
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.
  • H2S
  • oil
  • gas
  • compressed oil
Q.17
The breaker is completely off the bus and disconnected from the secondary disconnect. Which position is this called?
  • connect position
  • disconnect position
  • withdrawn position
  • parallel position
Q.18
_______________circuit breakers uses air as the dielectric medium in the interrupting unit
  • gas
  • electrons
  • steam
  • air
Q.19
What does MCC stand for ?
  • Master control centre
  • Motor control centre
  • Minding control centre
  • Maximizing control centre
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
  • interlocks
  • busbars
  • grounding trucks
  • grounding rods
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