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GETCO Exam Paper (22-07-2015)

GETCO Exam Paper (22-07-2015)
The line current in a three phase unbalanced load are Ir= 4+j6, Ib= 2-j2 and Ic= -3+j2, then zero sequence component of current will be

9 + j10
3 + j6
1 + j2
3 - j6

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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
Harmonic problem is avoided
System stability can be improved

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GETCO Exam Paper (22-07-2015)
What is the surge impedance loading of 400 kV line with surge impedance given as 160 Ω

1000 kW
400 MW
250 MW
1000 MW

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SIL = (kV)²/Z₀

GETCO Exam Paper (22-07-2015)
In the standard B-H curve X axis and Y axis intercepts respctively represents

residual magnetism and coercive force
Flux and MMF
coercive force and residual magnetism
Hysteresis loss and Flux

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

Switching over voltages
Harmonics
Load power factor
Corona

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GETCO Exam Paper (22-07-2015)
Who is the vice president of India? (As on 22/07/2015)

Nazama heptulla
Pranav Mukharjee
Dr. Hamid Ansari
O.P. Kohli

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