GETCO Exam Paper (30-11-2008)
Interconnected power systems operating with "tie line bias" will respond to

both frequency and tie line load changes
frequency changes only
tie line voltage changes only
tie line load changes only

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

to arrest flow of moisture into the tank
to suppress harmonics
to control the level of oil in the tank
to provide protection against over currents

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