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GETCO Exam Paper (22-07-2015)

GETCO Exam Paper (22-07-2015)
The Z matrix of 2 port network is given by [0.9 0.2 : 0.2 0.6]. The element Y22 of the corresponding Y matrix of the same network is given by

-0.4
1.8
1.2
0.4

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GETCO Exam Paper (22-07-2015)
The mechanical angle is _____ electrical angle

same
lesser than or equal to
greater than or equal to
always less

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Electrical angle = (P/2)*mechanicla angle

GETCO Exam Paper (22-07-2015)
Which of the following is not true about fuel cells?

cost is higher than batteries
no recharging is needed
more efficient
need more than two electrode

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GETCO Exam Paper (22-07-2015)
100% string efficiency means

One of the insulator discs shorted
None uniform potential distribution across each disc
Equal potential across each disc
Zero potential across each disc

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

changing
zero
none of this
constant

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)
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
3 + j6
1 + j2

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