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DGVCL Exam Paper (11-12-2011)

DGVCL Exam Paper (11-12-2011)
Different computers are connected to a LAN by a cable and a

Special wires
Telephone line
Interface card
Modem

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DGVCL Exam Paper (11-12-2011)
The mutual inductance between two unity coupled coils of 9 H and 4 H is

6 H
36 H
2.2 H
13 H

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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?

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

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

Vacuum CB
Minimum Oil CB
Bulk Oil CB
Air break CB

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DGVCL Exam Paper (11-12-2011)
In carrier current protection, the purpose of the wave trap is for

All of these
Trapping power frequency waves
Tripping fault current
Trapping high frequency waves entering into generator/transformer unit.

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DGVCL Exam Paper (11-12-2011)
First zone distance relay protects the transmission line section upto

25 % of its full length
80 % of its full length
Its full length
50 % of its full length

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