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GETCO Exam Paper (22-07-2015)

GETCO Exam Paper (22-07-2015)
The magnitude of sum of two sinusoidal AC voltages is equal to the magnitude of each individual voltage, What must be the phase difference between voltages?

60
180
120
90

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

lightning surge
excessive fault voltages
corona effect
switching surge

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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

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

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GETCO Exam Paper (22-07-2015)
The instantaneous value of power in purely inductive circuit is

none of this
zero
constant
changing

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

The instantaneous value of power in purely inductive circuit is changing as it is given as v*i. The average power of purely inductive circuit over a cycle is zero

GETCO Exam Paper (22-07-2015)
Switching surges are

short duration transient voltage
high voltage Acs
power frequency voltage
high votage DCs

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GETCO Exam Paper (22-07-2015)
The Y bus matrix is a sparse matrix because …

bus incidence matrix is a sparse matrix
no of lines are less
lines are connected to less no. of buses
Y primitive is a sparse matrix

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MORE MCQ ON GETCO Exam Paper (22-07-2015)

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