Graded time lag over current relaying without directional features can be employed for protection of

GETCO Exam Paper (30-11-2008)
Graded time lag over current relaying without directional features can be employed for protection of

parallel feeders

ring mains

radial feeders

none of these

parallel feeders

ring mains

radial feeders

none of these

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GETCO Exam Paper (30-11-2008)
If a power system is transiently stable, it

may be dynamically unstable

both (a) & (c )

will oscillate beyond the first swing

is always dynamically stable

may be dynamically unstable

both (a) & (c )

will oscillate beyond the first swing

is always dynamically stable

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GETCO Exam Paper (30-11-2008)
A buchholz will operate in a transformer whenever there is

any of the above

large internal fault

saturation of magnetic circuit

over load

any of the above

large internal fault

saturation of magnetic circuit

over load

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GETCO Exam Paper (30-11-2008)
Highest voltage for transmitting electrical power in India is (in 2008)

765 kV

400 kV

550 kV

700 kV

765 kV

400 kV

550 kV

700 kV

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GETCO Exam Paper (30-11-2008)
The function of a breather in a transformer is

to suppress harmonics

to arrest flow of moisture into the tank

to control the level of oil in the tank

to provide protection against over currents

to suppress harmonics

to arrest flow of moisture into the tank

to control the level of oil in the tank

to provide protection against over currents

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GETCO Exam Paper (30-11-2008)
The delay fuses are used for protection of

light circuits

motors

fluorescent lamp

none of these

light circuits

motors

fluorescent lamp

none of these

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GETCO Exam Paper (30-11-2008)

GETCO Exam Paper (30-11-2008) Graded time lag over current relaying without directional features can be employed for protection of

GETCO Exam Paper (30-11-2008) If a power system is transiently stable, it

GETCO Exam Paper (30-11-2008) A buchholz will operate in a transformer whenever there is

GETCO Exam Paper (30-11-2008) Highest voltage for transmitting electrical power in India is (in 2008)

GETCO Exam Paper (30-11-2008) The function of a breather in a transformer is

GETCO Exam Paper (30-11-2008) The delay fuses are used for protection of

GETCO Exam Paper (30-11-2008)
Graded time lag over current relaying without directional features can be employed for protection of

GETCO Exam Paper (30-11-2008)
If a power system is transiently stable, it

GETCO Exam Paper (30-11-2008)
A buchholz will operate in a transformer whenever there is

GETCO Exam Paper (30-11-2008)
Highest voltage for transmitting electrical power in India is (in 2008)

GETCO Exam Paper (30-11-2008)
The function of a breather in a transformer is

GETCO Exam Paper (30-11-2008)
The delay fuses are used for protection of