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GETCO Exam Paper (22-07-2015)

GETCO Exam Paper (22-07-2015)
For eliminating 7th harmonics from generated EMF in alternator the fractional pitch must be

5\6
6\7
2\3
7\8

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

fractional pitch = Cos( α/2)
α is obtain from: (nα/2)=90˚ where n is harmonic
α=25.7143˚
fractional pitch=6/7

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

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

ANSWER DOWNLOAD EXAMIANS APP

GETCO Exam Paper (22-07-2015)
The constraints that are to be met with while solving UC problem are

Spinning reserve
all are correct
Minimum down time
Minimum up time

ANSWER DOWNLOAD EXAMIANS APP

GETCO Exam Paper (22-07-2015)
Speed of induction motor at rated torque is _____ than at maximum torque.

depends on load
same
greater
lesser

ANSWER DOWNLOAD EXAMIANS APP

GETCO Exam Paper (22-07-2015)
The PU impedance of a 1089 MVA, 33 kV generator is 1, the ohmic value of its impedance is:

10
0.5
100
1

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GETCO Exam Paper (22-07-2015)
Penalty factor in power system economical operation is measure of

fuel cost
Line loss
generation cost
all are correct

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON GETCO Exam Paper (22-07-2015)

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