An unloaded generator with a pre-fault voltage 1 pu has the following sequence impedance: Z0 = j 0.15 pu, Z1 = Z2 = j 0.25 pu The neutral is grounded with a reactance of 0.05 pu. The fault current in pu for single line to ground fault is

Power Systems
An unloaded generator with a pre-fault voltage 1 pu has the following sequence impedance: Z0 = j 0.15 pu, Z1 = Z2 = j 0.25 pu The neutral is grounded with a reactance of 0.05 pu. The fault current in pu for single line to ground fault is

4.28 pu

2.5 pu

7.25 pu

3.75 pu

4.28 pu

2.5 pu

7.25 pu

3.75 pu

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Power Systems
Advantages of gauss siedel method is/are

calculation time for each iteration is less

All of these

applicable for large power system network

number of iterations are less

calculation time for each iteration is less

All of these

applicable for large power system network

number of iterations are less

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Power Systems
Surge impedance loading of a transmission line can be increased by

addition of lumped inductance in parallel

increasing its voltage level

both 1 and 3

addition of lumped capacitance in series

addition of lumped inductance in parallel

increasing its voltage level

both 1 and 3

addition of lumped capacitance in series

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Power Systems
A Pelton wheel turbine having a rated speed of 300 rpm is connected to an alternator to produce power at 50 Hz. The number of poles required in the alternator is

10

20

4

8

10

20

4

8

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Power Systems
Demand factor of a plant is

1

greater than 1

0

less than 1

1

greater than 1

0

less than 1

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Power Systems
Which of following statement are false

A thermal reactor needs a moderator material.

In nuclear power plants, chain reaction is controlled by cadmium rods.

In a nuclear reactor, multiplication factor is kept almost equal to one.

Nuclear power plants are used as peak load plants only.

A thermal reactor needs a moderator material.

In nuclear power plants, chain reaction is controlled by cadmium rods.

In a nuclear reactor, multiplication factor is kept almost equal to one.

Nuclear power plants are used as peak load plants only.

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Power Systems

Power Systems An unloaded generator with a pre-fault voltage 1 pu has the following sequence impedance: Z0 = j 0.15 pu, Z1 = Z2 = j 0.25 pu The neutral is grounded with a reactance of 0.05 pu. The fault current in pu for single line to ground fault is

Power Systems Advantages of gauss siedel method is/are

Power Systems Surge impedance loading of a transmission line can be increased by

Power Systems A Pelton wheel turbine having a rated speed of 300 rpm is connected to an alternator to produce power at 50 Hz. The number of poles required in the alternator is

Power Systems Demand factor of a plant is

Power Systems Which of following statement are false

Power Systems
An unloaded generator with a pre-fault voltage 1 pu has the following sequence impedance: Z0 = j 0.15 pu, Z1 = Z2 = j 0.25 pu The neutral is grounded with a reactance of 0.05 pu. The fault current in pu for single line to ground fault is

Power Systems
Advantages of gauss siedel method is/are

Power Systems
Surge impedance loading of a transmission line can be increased by

Power Systems
A Pelton wheel turbine having a rated speed of 300 rpm is connected to an alternator to produce power at 50 Hz. The number of poles required in the alternator is

Power Systems
Demand factor of a plant is

Power Systems
Which of following statement are false