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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

C/LR
L/CR
LCR
LC/R

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

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

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

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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
0.5
zero
0.866

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

unequal line voltage
high voltage
none
low voltage

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