Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are identical as 4% from no load to full load. Consider the governors operating at 50Hz on no load. What is the operating frequency, if the load is 600 MW?

Electrical Machines
Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are identical as 4% from no load to full load. Consider the governors operating at 50Hz on no load. What is the operating frequency, if the load is 600 MW?

50 Hz

48.5 Hz

45 HZ

48 Hz

50 Hz

48.5 Hz

45 HZ

48 Hz

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Electrical Machines
The main disadvantage(s) of the ward-Leonard system is/are

poor overall efficiency.

high initial cost.

high maintenance cost.

all of above.

poor overall efficiency.

high initial cost.

high maintenance cost.

all of above.

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Electrical Machines
For high current and low voltage rating which winding is employed to DC machine?

Wave winding.

Both wave and lap winding.

No wave and lap winding.

Lap winding.

Wave winding.

Both wave and lap winding.

No wave and lap winding.

Lap winding.

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Electrical Machines
Armature reaction in a DC machine

makes an angle of 90° with the main pole axis.

is in direct opposition to the main poles.

makes an angle with the main pole axis which is load dependent.

is in the same direction as the main poles.

makes an angle of 90° with the main pole axis.

is in direct opposition to the main poles.

makes an angle with the main pole axis which is load dependent.

is in the same direction as the main poles.

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Electrical Machines
3rd harmonics are eliminated in induction motor by using

delta connection.

star connection.

zig - zag connection.

V connection.

delta connection.

star connection.

zig - zag connection.

V connection.

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Electrical Machines
In case of a compensated DC series motor, the compensating winding is provided

In series with the armature winding.

In parallel with the armature winding.

In parallel with the field winding.

As a separate unit.

In series with the armature winding.

In parallel with the armature winding.

In parallel with the field winding.

As a separate unit.

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Electrical Machines

Electrical Machines The main disadvantage(s) of the ward-Leonard system is/are

Electrical Machines For high current and low voltage rating which winding is employed to DC machine?

Electrical Machines Armature reaction in a DC machine

Electrical Machines 3rd harmonics are eliminated in induction motor by using

Electrical Machines In case of a compensated DC series motor, the compensating winding is provided

Electrical Machines
The main disadvantage(s) of the ward-Leonard system is/are

Electrical Machines
For high current and low voltage rating which winding is employed to DC machine?

Electrical Machines
Armature reaction in a DC machine

Electrical Machines
3rd harmonics are eliminated in induction motor by using

Electrical Machines
In case of a compensated DC series motor, the compensating winding is provided