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DGVCL Exam Paper (11-12-2011)

DGVCL Exam Paper (11-12-2011)
An AC series circuit has R = 6 Ω, XL = 20 Ω and Xc = 12 Ω. The ciruit power factor will be

0.6 lagging
0.8 lagging
0.5 leading
0.6 leading

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DGVCL Exam Paper (11-12-2011)
All the peripheral devices connected to a computer require power to work. Which of the following voltages is required for the motherboard to work?

Positive cycle of sine wave
Negative cycle of sine wave
DC
AC

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DGVCL Exam Paper (11-12-2011)
If a 5 A fuse is blown frequently in a house lighting circuit, it is required to

Insert a fuse of higher current rating
Insert a fuse of higher voltage rating
Check the load
Reduce the load

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DGVCL Exam Paper (11-12-2011)
At time t= 0+ , with zero initial condition, which of the following acts as a short circuit?

Voltage source
Capacitor
Resistor
Conductor

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DGVCL Exam Paper (11-12-2011)
Ybus used in power flow studies and Zbus used in short circuit studies

Are transpose of each other
Are inverse of each other
Are the same
Have no inter relation

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DGVCL Exam Paper (11-12-2011)
The circuit breaker generally used in railway traction is

Bulk Oil CB
Air break CB
Minimum Oil CB
Vacuum CB

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