MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 17 Mcqs, each offering curated multiple-choice questions to sharpen your Network Theory knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A symmetrical star connected system has VRN = 230∠0⁰. The phase sequence is RYB. Find VBR. |
| A. | 398.37∠210⁰ |
| B. | 398.37∠-210⁰ |
| C. | 398.37∠120⁰ |
| D. | 398.37∠-120⁰ |
| Answer» C. 398.37∠120⁰ | |
| 2. |
A symmetrical star connected system has VRN = 230∠0⁰. The phase sequence is RYB. Find VYB. |
| A. | 398.37∠-30⁰ |
| B. | 398.37∠210⁰ |
| C. | 398.37∠90⁰ |
| D. | 398.37∠-90⁰ |
| Answer» E. | |
| 3. |
A symmetrical star connected system has VRN = 230∠0⁰. The phase sequence is RYB. Find VRY. |
| A. | 398.37∠30⁰ |
| B. | 398.37∠-30⁰ |
| C. | 398.37∠90⁰ |
| D. | 398.37∠-90⁰ |
| Answer» B. 398.37∠-30⁰ | |
| 4. |
The voltages, VBR ,Vph are related in star connected system is? |
| A. | VBR = 3Vph |
| B. | VBR = 3√3Vph |
| C. | VBR = √3Vph |
| D. | VBR = Vph |
| Answer» D. VBR = Vph | |
| 5. |
In a star connected system, the relation between VYB, Vph is? |
| A. | VYB = Vph |
| B. | VYB = 3√3Vph |
| C. | VYB = 3Vph |
| D. | VYB = √3Vph |
| Answer» E. | |
| 6. |
The relation between VRY, Vph in a star connected system is? |
| A. | VRY = Vph |
| B. | VRY = √3Vph |
| C. | VRY = 3√3Vph |
| D. | VRY = 3Vph |
| Answer» C. VRY = 3√3Vph | |
| 7. |
In a star connected system, the phasors VRN, VYN are ____ apart. |
| A. | 15⁰ |
| B. | 30⁰ |
| C. | 45⁰ |
| D. | 60⁰ |
| Answer» E. | |
| 8. |
The relation between the lengths of the phasors VRN and – VYN is? |
| A. | |VRN| > – |VYN| |
| B. | |VRN| < – |VYN| |
| C. | |VRN| = – |VYN| |
| D. | |VRN| >= – |VYN| |
| Answer» D. |VRN| >= – |VYN| | |
| 9. |
In three phase system, the line voltage VRY is equal to? |
| A. | phasor sum of VRN and VNY |
| B. | phasor difference of VRN and VNY |
| C. | phasor sum of VRN and VNY |
| D. | algebraic sum of VRN and VNY |
| Answer» B. phasor difference of VRN and VNY | |
| 10. |
In star connected system, VRY is equal to? |
| A. | VYR |
| B. | -VYR |
| C. | 2VYR |
| D. | 3VYR |
| Answer» C. 2VYR | |
| 11. |
The voltages, VBR ,Vph are related in star connected system is? |
| A. | V<sub>BR</sub> =3V<sub>ph</sub> |
| B. | V<sub>BR</sub> =3‚àö3V<sub>ph</sub> |
| C. | V<sub>BR</sub> =‚àö3V<sub>ph</sub> |
| D. | V<sub>BR</sub> =V<sub>ph</sub> |
| Answer» D. V<sub>BR</sub> =V<sub>ph</sub> | |
| 12. |
In a star connected system, the relation between VYB ,Vph is? |
| A. | V<sub>YB</sub> =V<sub>ph</sub> |
| B. | V<sub>YB</sub> =3‚àö3V<sub>ph</sub> |
| C. | V<sub>YB</sub> =3V<sub>ph</sub> |
| D. | V<sub>YB</sub> =‚àö3V<sub>ph</sub> |
| Answer» E. | |
| 13. |
The relation between VRY ,Vph in a star connected system is? |
| A. | V<sub>RY</sub> =V<sub>ph</sub> |
| B. | V<sub>RY</sub> =‚àö3V<sub>ph</sub> |
| C. | V<sub>RY</sub> =3‚àö3V<sub>ph</sub> |
| D. | V<sub>RY</sub> =3V<sub>ph</sub> |
| Answer» C. V<sub>RY</sub> =3‚Äö√Ñ√∂‚àö‚Ć‚àö‚àÇ3V<sub>ph</sub> | |
| 14. |
In a star connected system, the phasors VRN , VYN are ____ apart. |
| A. | 15‚Äö√Ö‚àû |
| B. | 30‚Äö√Ö‚àû |
| C. | 45‚Äö√Ö‚àû |
| D. | 60‚Äö√Ö‚àû |
| Answer» E. | |
| 15. |
The relation between the lengths of the phasors VRN and – VYN is?$ |
| A. | |V<sub>RN</sub>| > – |V<sub>YN</sub>| |
| B. | |V<sub>RN</sub>| < – |V<sub>YN</sub>| |
| C. | |V<sub>RN</sub>| = – |V<sub>YN</sub>| |
| D. | |V<sub>RN</sub>| >= – |V<sub>YN</sub>| |
| Answer» D. |V<sub>RN</sub>| >= ‚Äö√Ñ√∂‚àö√ë‚àö¬® |V<sub>YN</sub>| | |
| 16. |
In three phase system, the line voltage VRY is equal to? |
| A. | phasor sum of V<sub>RN</sub> and V<sub>NY</sub> |
| B. | phasor difference of V<sub>RN</sub> and V<sub>NY</sub> |
| C. | phasor sum of V<sub>RN</sub> and V<sub>NY</sub> |
| D. | algebraic sum of V<sub>RN</sub> and V<sub>NY</sub> |
| Answer» B. phasor difference of V<sub>RN</sub> and V<sub>NY</sub> | |
| 17. |
In star connected system, VRY is equal to? |
| A. | V<sub>YR</sub> |
| B. | -V<sub>YR</sub> |
| C. | 2V<sub>YR</sub> |
| D. | 3V<sub>YR</sub> |
| Answer» C. 2V<sub>YR</sub> | |