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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

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

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

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

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GETCO Exam Paper (22-07-2015)
The surge impedance loading of the line will _____ if the length of the line is double

double
four times
become half
remains same

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Surge impedance is independent of length of the line

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

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

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

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

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GETCO Exam Paper (22-07-2015)
In sub stations for making and breaking of load current

load interrupter switches are used
circuit breakers are used
relays are used
isolators are used

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

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