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DGVCL Exam Paper (11-12-2011)

DGVCL Exam Paper (11-12-2011)
A fixed step by step procedure for finding the solution of a problem on computer is called

Algorithm
Hardware
Logic
Software

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DGVCL Exam Paper (11-12-2011)
The form factor in AC means the ration of

Peak value to r.m.s value
R.M.S. value to peak value
Peak value to average value
R.M.S. value to average value

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DGVCL Exam Paper (11-12-2011)
Which motor is used to start heavy loads?

Differentially compounded motor
Cumulatively compounded motor
Shunt motor
Series motor

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Torque in d.c motor = k* φ * Ia
In series motor φ α Ia
Tα I²
starting torque of dc series motor is high

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

Webcam
Speaker
Joystick
Scanner

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DGVCL Exam Paper (11-12-2011)
If a relay fails to operate inspite of a fault in its own zone of protection, it is said to

Pick up
Reach
Under reach
Over reach

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DGVCL Exam Paper (11-12-2011)
In the protection of transformers, harmonic restraint is used to guard against

Switching over voltages
Unbalanced protection
Lightning
Magnetizing inrush current

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Initial inrush of magnetizing currents have high component of even and odd harmonics.
2nd - 63%
3rd -26.8%
4th- 5.1%
5th- 4.1%
6th- 3.7
7th-2.4

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