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MCQs 1: What is transient stability limit?

The maximum flow of power through a particular point in the power system without loss of stability when small disturbances occur. The maximum power flow possible through a particular component connected in the power system. The maximum flow of power through a particular point in the power system without loss of stability when large and sudden disturbances occur All of these None of these
Answer Explanation

MCQs 2: By using which component can the transient stability limit of a power system be improved?

Series resistance Series capacitor Series inductor Shunt resistance
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MCQs 3: What is the value of transient stability limit?

Higher than steady state stability limit Lower than steady state stability limit. Depending upon the severity of load All of these None of these
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MCQs 4: Which among these phenomenons is / are associated with angle stability?

Imbalance between the two generator torque Stability or synchronism is lost Surplus energy is stored up in the rotating masses All of these None of these
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MCQs 5: What is / are the cause(s) for transient disturbance?

Sudden load changes Faults in the power system Switching operations All of these None of these
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MCQs 6: On what factors does the transient stability depend on?

Initial operating state Severity of disturbances Voltage instability Both (a) and (b) All of these
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MCQs 7: What is voltage stability?

To maintain steady voltages at all the buses after the occurrence of fault. To maintain steady voltages at all the buses before the occurrence of fault. To maintain the system frequency after the severe disturbances All of these None of these
Answer Explanation

MCQs 8: What is the main cause of voltage instability?

Generators Transformers Loads Line losses
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MCQs 9: Which among the following phenomenon is generally associated with voltage stability?

Temporary load reduction Voltage is reduced Voltage collapses All of these None of these
Answer Explanation

MCQs 10: What is frequency stability?

To maintain steady frequency following severe disturbance resulting in the imbalance between transformer and load To maintain steady frequency following severe disturbances resulting in the imbalance between generators and load To maintain a steady frequency in all the protection components and the transmission lines. Both (a) and (b) All of these
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