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GETCO Exam Paper (30-11-2008)

GETCO Exam Paper (30-11-2008)
An AC transmission line requires a VAR input:

to improve stability
to increase power transmission
to improve the regulation
to reduce losses

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GETCO Exam Paper (30-11-2008)
Arcing voltage will be the least in case of

tungsten
carbon
silver
copper

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GETCO Exam Paper (30-11-2008)
The first battle of Panipat was fought in the year

1542 AD
1526 AD
1296 AD
1556 AD

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

parallel feeders
none of these
radial feeders
ring mains

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GETCO Exam Paper (30-11-2008)
The disadvantage of transmission lines as compared to cables is

exposure to atmosphere hazards like smoke, ice, etc.
All of these
inductive interference between power communication circuits
exposure to lightening

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GETCO Exam Paper (30-11-2008)
In a dry type transformer, accumulation of dust on the windings and core is likely to cause

reduction in heat dissipation
corrosion of core material
short circuiting of primary winding
short circuiting of secondary winding

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