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DGVCL Exam Paper (11-12-2011)

DGVCL Exam Paper (11-12-2011)
A device connected to the computer which converts digital signals to analog and vice-versa is

CPU
Modem
UPS
Keyboard

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DGVCL Exam Paper (11-12-2011)
People can interact with each other through any part of the world through video conferencing using

Webcam
Speaker
Scanner
Joystick

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

Minimum Oil CB
Air break CB
Vacuum CB
Bulk Oil CB

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

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

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DGVCL Exam Paper (11-12-2011)
An over excited synchronous motor draws current at

Depends on nature of load
Leading power factor
Unity power factor
Lagging power factor

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Over excitation : leading current
Under excitation : lagging current
Normal excitation : current with unity PF (in phase current)

DGVCL Exam Paper (11-12-2011)
The effect of electric shock on the human body depends on

Voltage
All of these
Duration of contact
Current

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