MCQOPTIONS
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MCQOPTIONS
This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Network Theory Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A balanced delta-connected load of (2+j3) Ω per phase is connected to a balanced three-phase 440V supply. The phase current is 10A. Find the apparent power. |
| A. | 10955.67 VAR |
| B. | 10.95567 VAR |
| C. | 109.5567 VAR |
| D. | 1.095567 VAR |
| Answer» B. 10.95567 VAR | |
| 2. |
A balanced delta-connected load of (2+j3) Ω per phase is connected to a balanced three-phase 440V supply. The phase current is 10A. Find the total active power. |
| A. | 7.26W |
| B. | 726W |
| C. | 7260W |
| D. | 72.6W |
| Answer» D. 72.6W | |
| 3. |
The relation between IL and IPh is in a delta connected system is? |
| A. | IL = IPh |
| B. | IL = √3 IPh |
| C. | IL = 3 IPh |
| D. | IL = 3√3IPh |
| Answer» C. IL = 3 IPh | |
| 4. |
In a delta-connected system, the currents IR = IB = IY =? |
| A. | IPh |
| B. | 2IPh |
| C. | 3IPh |
| D. | 4IPh |
| Answer» B. 2IPh | |
| 5. |
In delta-connected system, the currents IR, IY, IB are equal in magnitude and they are displaced by _____ from one another. |
| A. | 0⁰ |
| B. | 60⁰ |
| C. | 90⁰ |
| D. | 120⁰ |
| Answer» E. | |
| 6. |
In a delta connected system, the voltage across the terminals R and Y is 400∠0⁰. Find the line voltage VBR. |
| A. | 400∠240⁰ |
| B. | 400∠120⁰ |
| C. | 400∠-240⁰ |
| D. | 400∠-120⁰ |
| Answer» D. 400∠-120⁰ | |
| 7. |
In a delta connected system, the voltage across the terminals R and Y is 400∠0⁰. Find the line voltage VYB. |
| A. | 400∠120⁰ |
| B. | 400∠-120⁰ |
| C. | 400∠240⁰ |
| D. | 400∠-240⁰ |
| Answer» C. 400∠240⁰ | |
| 8. |
In a delta connected system, the voltage across the terminals R and Y is 400∠0⁰. Calculate the line voltage VRY. Assume RRY phase sequence. |
| A. | 400∠0⁰ |
| B. | 400∠120⁰ |
| C. | 400∠-120⁰ |
| D. | 400∠240⁰ |
| Answer» B. 400∠120⁰ | |