DGVCL Exam Paper (11-12-2011)

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

80 % of its full length

Its full length

50 % of its full length

25 % of its full length

80 % of its full length

Its full length

50 % of its full length

25 % of its full length

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DGVCL Exam Paper (11-12-2011)
The motor used in celling fans is

Universal motor

Capacitor start motor

Capacitor start capacitor run motor

Split phase motor

Universal motor

Capacitor start motor

Capacitor start capacitor run motor

Split phase motor

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

Special wires

Telephone line

Modem

Interface card

Special wires

Telephone line

Modem

Interface card

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DGVCL Exam Paper (11-12-2011)
If the fault current is 2000 A, the relay plug setting is 50% and the CT ratio is 400/5, the plug setting multiple will be

25

15

50

10

25

15

50

10

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DGVCL Exam Paper (11-12-2011)
Rated making capacity of a ciruit breaker is equal to

√2 X rated symmetrical breaking capacity

1.11 X rated symmetrical breaking capacity

Rated symmetrical breaking capacity

2.55 X rated symmetrical breaking capacity

√2 X rated symmetrical breaking capacity

1.11 X rated symmetrical breaking capacity

Rated symmetrical breaking capacity

2.55 X rated symmetrical breaking capacity

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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

0.5 leading

0.6 leading

0.8 lagging

0.6 lagging

0.5 leading

0.6 leading

0.8 lagging

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