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GETCO EXAM PAPER (22-07-2015)

GETCO Exam Paper (22-07-2015)
The steady state stability of the power systems is most effected by

stability of generator
voltage at generator bus
transmission line reactance
power factor of the load

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GETCO Exam Paper (22-07-2015)
In case of HVDC transmission there is _____

no charging current no skin effect
charging current but no skin effect
no charging current but skin effect
both charging effect and skin effect

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GETCO Exam Paper (22-07-2015)
HVDC transmission is preferred to EHV AC because

Its terminal equipment are inexpensive
VAR compensation is not required in it
System stability can be improved
Harmonic problem is avoided

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GETCO Exam Paper (22-07-2015)
The insulation strength of an EHV transmission line is mainly governed by

Corona
Harmonics
Load power factor
Switching over voltages

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GETCO Exam Paper (22-07-2015)
Earth wire on EHV overhead transmission line is provided to protect the line against

excessive fault voltages
corona effect
lightning surge
switching surge

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