A DC shunt generator builds up to a voltage of 220 V at no load while running at its rated speed. If the speed of the generator is raised by 25% kepping the circuit conditions unaltered, then the Voltage to which the machine would build up will

Electrical Machines
A DC shunt generator builds up to a voltage of 220 V at no load while running at its rated speed. If the speed of the generator is raised by 25% kepping the circuit conditions unaltered, then the Voltage to which the machine would build up will

not change and remain at 220 V

increase to 1.25 times 220 V

increase to value lying between 220 V and 1.25 times 220 V

increase to a value greater than 1.25 times 220 V

not change and remain at 220 V

increase to 1.25 times 220 V

increase to value lying between 220 V and 1.25 times 220 V

increase to a value greater than 1.25 times 220 V

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Electrical Machines
The inertia constant H of a synchronous condenser is

equal to that of the effective length of the line.

greater than that of hydro generator.

none of these.

greater than that of turbo alternator.

equal to that of the effective length of the line.

greater than that of hydro generator.

none of these.

greater than that of turbo alternator.

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Electrical Machines
A single phase, 2 KV alternator has an armature resistance of 0.8 ohms and 4.94 ohms respectively. The voltage regulation of the alternator at 100 a load 0.8 loading power factor is

0%.

7%.

14%.

8.9%.

0%.

7%.

14%.

8.9%.

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Electrical Machines
Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are 4% and 5% from no load to full load. Consider the governors operating at 50Hz on no load. How will the machine share, if the load is 600 MW?

None of these

generator 1 gets over load

200 MW and 400MW

generator 2 gets over load

None of these

generator 1 gets over load

200 MW and 400MW

generator 2 gets over load

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Electrical Machines
Which of the following machines have highest power factor with respect to magnetizing current?

Closed slot type machines.

Any of the above.

Semi closed slot type machine.

Open slot type machines.

Closed slot type machines.

Any of the above.

Semi closed slot type machine.

Open slot type machines.

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Electrical Machines
For standing a DC motor a starter is required because

it limits the starting current to a safe value.

it limits the speed of the motor.

It starts the motor.

None of these

it limits the starting current to a safe value.

it limits the speed of the motor.

It starts the motor.

None of these

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Electrical Machines

Electrical Machines A DC shunt generator builds up to a voltage of 220 V at no load while running at its rated speed. If the speed of the generator is raised by 25% kepping the circuit conditions unaltered, then the Voltage to which the machine would build up will

Electrical Machines The inertia constant H of a synchronous condenser is

Electrical Machines A single phase, 2 KV alternator has an armature resistance of 0.8 ohms and 4.94 ohms respectively. The voltage regulation of the alternator at 100 a load 0.8 loading power factor is

Electrical Machines Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are 4% and 5% from no load to full load. Consider the governors operating at 50Hz on no load. How will the machine share, if the load is 600 MW?

Electrical Machines Which of the following machines have highest power factor with respect to magnetizing current?

Electrical Machines For standing a DC motor a starter is required because

Electrical Machines
A DC shunt generator builds up to a voltage of 220 V at no load while running at its rated speed. If the speed of the generator is raised by 25% kepping the circuit conditions unaltered, then the Voltage to which the machine would build up will

Electrical Machines
The inertia constant H of a synchronous condenser is

Electrical Machines
A single phase, 2 KV alternator has an armature resistance of 0.8 ohms and 4.94 ohms respectively. The voltage regulation of the alternator at 100 a load 0.8 loading power factor is

Electrical Machines
Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are 4% and 5% from no load to full load. Consider the governors operating at 50Hz on no load. How will the machine share, if the load is 600 MW?

Electrical Machines
Which of the following machines have highest power factor with respect to magnetizing current?

Electrical Machines
For standing a DC motor a starter is required because