MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Power Systems knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Post a three phase fault that occurs in a system, then its transient stability can be examined using ___________ |
| A. | solution of swing equation |
| B. | equal area criterion |
| C. | solution of swing equation and equal area criterion |
| D. | solution of swing equation or equal area criterion |
| Answer» B. equal area criterion | |
| 2. |
The transient instabilities can occur in a system by ___________ |
| A. | Sudden load changes |
| B. | Switching operation |
| C. | Faults |
| D. | Suddenn load changes, switching operation and faults |
| Answer» E. | |
| 3. |
We can say a system is stable at steady state is not affected by ____________ |
| A. | line losses |
| B. | line reactance |
| C. | generator reactance |
| D. | excitation of alternators |
| Answer» B. line reactance | |
| 4. |
The transient stability and the steady state stability of a power transmission system ________ |
| A. | maintain synchronism between machine and tie lines at all the circumstances |
| B. | maintains frequency exactly at 50 Hz |
| C. | maintain voltage regulation precisely |
| D. | all of the mentioned |
| Answer» B. maintains frequency exactly at 50 Hz | |
| 5. |
Why the angle δ, rotor angle is famously called as the load angle in the equation of rotor dynamics? |
| A. | Due to power exchange is a function of δ |
| B. | Because it dictates the reactive power compensation |
| C. | Due to load variations |
| D. | No dependency on the load dynamics |
| Answer» B. Because it dictates the reactive power compensation | |
| 6. |
A variation in the power transfer had been observed at the generating station while power exchange process due to ______ and is known as ______ |
| A. | swing of the machine, inertial response |
| B. | sub synchronism, hunting |
| C. | sub synchronism, inertial response |
| D. | swing of the machine, falling out of the rotor |
| Answer» B. sub synchronism, hunting | |
| 7. |
Swing equation which describes the relative motion of the rotor of the machine, is a __________ |
| A. | linear and second-order differential equation |
| B. | non linear and second-order differential equation |
| C. | non linear and first-order differential equation |
| D. | non linear and hyperbolic equation |
| Answer» C. non linear and first-order differential equation | |
| 8. |
Swing equation is very famous for describing the relation between the ___________ |
| A. | rotor motion and stator field |
| B. | stator and rotor field |
| C. | load angle and rotor field |
| D. | moment of inertia and rotor motion |
| Answer» B. stator and rotor field | |
| 9. |
The angle shown in the figure depends on which of the following given options? |
| A. | Loading of the system |
| B. | Power factor |
| C. | Operating frequency |
| D. | Power factor, operating frequency, loading of the system |
| Answer» B. Power factor | |
| 10. |
The synchronous machine is operating at a normal condition at the generating system, then the angle between rotor axis and the stator magnetic axis is _____________ |
| A. | Load angle |
| B. | Power factor angle |
| C. | Impedance angle |
| D. | None of the mentioned |
| Answer» B. Power factor angle | |