## DGVCL Exam Paper (11-12-2011) DC series motors are best suited for traction work because

Its torque is proportional to the square of the armature current and speed is inversely proportional to torque
Torque and speed are proportional to the square of the armature current
Torque and speed are inversely proportional to the square of the armature current
Its torque is proportional to the square of the armature current and speed is directional proporational to torque

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

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

## DGVCL Exam Paper (11-12-2011) Two parallel conductors are carrying the current in the same direction. Which of the following statements is correct?

There is a repelling force between the conductors
There is an attracting force between the conductors
The force increases when the distance between the conductors is decreased
The force increases when the distance between the conductors is increased

## DGVCL Exam Paper (11-12-2011) The corona effect can be minimized by increasing

Diameter of the conductor
Both spacing between the conductors and diameter of the conductor
Spacing between the conductors
The length of the conductor

2.2 H
6 H
36 H
13 H

Different
Zero
Infinite
Equal