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GETCO EXAM PAPER (11-06-2017)

GETCO Exam Paper (11-06-2017)
The dynamic resistance of a parallel resonant circuit is given by

LCR
LC/R
L/CR
C/LR

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GETCO Exam Paper (11-06-2017)
The rated voltage of a 3-phase power system is given as

peak line-to-peak voltage
rms line-to-line voltage
rms phase voltage
peak phase voltage

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GETCO Exam Paper (11-06-2017)
To improve the power factor in three phase circuits, the capacitor bank is connected in delta to make

the power factor correction more effective
capacitance very small
the connection elegant
capacitance calculation elegant

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GETCO Exam Paper (11-06-2017)
If the reading of two wattmeters are equal and positive in two wattmeter method, the load power factor in abalanced 3-phase 3-wire circuit will be

unity
0.866
zero
0.5

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

W1 = W2 (+Ve) → PF = 1
W1, W2 Positive → PF > 0.5
W1 +Ve, W2 = 0 → PF = 0.5
W1 +Ve, W2 = -Ve → PF < 0.5
W1 = - W2 → PF = 0

GETCO Exam Paper (11-06-2017)
In a 3-phase supply, floating neutral is undesirable because it may result in _____ across the load

low voltage
high voltage
unequal line voltage
none

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