MCQOPTIONS
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MCQOPTIONS
This section includes 8 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. |
What does the steady state stability of a power system signify? |
| A. | Maintaining the rated voltage |
| B. | Maintaining rated frequency |
| C. | Maintaining a synchronism between machines and tie-lines |
| D. | All of the mentioned |
| Answer» D. All of the mentioned | |
| 2. |
Use of high speed circuit breaker will actually increase the system stability. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
The measure to improve the transient stability of the power system during the unbalanced or unsymmetrical fault can be taken as ________ |
| A. | Single pole switching of CB |
| B. | Excitation control |
| C. | Phase shifting transformer |
| D. | Increasing turbine valve opening |
| Answer» B. Excitation control | |
| 4. |
If there are two machines having moment of inertia M1 and M2, where M1<M2; The possible number of equivalent moment of inertia will be _______________ |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 5. |
As per the system given, machine B will receive the active and reactive power from machine A when ______________ |
| A. | is positive and Va is more than Vb |
| B. | is positive and Va is less than Vb |
| C. | is positive and Va is same as Vb |
| D. | is negative and Va is more than Vb |
| Answer» B. is positive and Va is less than Vb | |
| 6. |
There is 2-machine model having losses too, with their transfer impedance being resistive. The maximum value of sending power P1max and maximum receiving end power P2max will take place with power angle such that |
| A. | Both P<sub>1max</sub> and P<sub>2max</sub> will occur at <90 |
| B. | Both P<sub>1max</sub> and P<sub>2max</sub> will occur at >90 |
| C. | P<sub>1max</sub> occurs at > 90 and P<sub>2max</sub> will occur at <90 |
| D. | P<sub>1max</sub> occurs at < 90 and P<sub>2max</sub> will occur at >90 |
| Answer» B. Both P<sub>1max</sub> and P<sub>2max</sub> will occur at >90 | |
| 7. |
How can we improve the steady state stability of the synchronous generator for a better performance? |
| A. | Increasing the excitation |
| B. | Increasing reactance |
| C. | Decreasing moment of inertia |
| D. | Increasing moment of inertia |
| Answer» B. Increasing reactance | |
| 8. |
How can we check upon the transient stability of a power system? |
| A. | By checking variation in load angle |
| B. | By checking variation of real power with load angle |
| C. | Checking variation in load angle and real power |
| D. | Checking variation in load angle or real power |
| Answer» D. Checking variation in load angle or real power | |