MCQOPTIONS
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MCQOPTIONS
This section includes 4 Mcqs, each offering curated multiple-choice questions to sharpen your Transformers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Zero voltage regulation of a transformer is achieved at 1 pf leading. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
What is the correct formula to get power factor angle in lagging condition? |
| A. | sin = X/R |
| B. | tan = R/X |
| C. | cos = R/ (R2+X2) |
| D. | cos = R/X |
| Answer» D. cos = R/X | |
| 3. |
Which is the correct phasor equation indicating the transformer voltages leading? |
| A. | V<sub>1</sub> = V<sub>2</sub> + I*(R cos - X sin ) |
| B. | V<sub>2</sub> = V<sub>1</sub> + I*(R cos - X sin ) |
| C. | V<sub>1</sub> = V<sub>2</sub> + I*(X cos - X sin ) |
| D. | V<sub>1</sub> = V<sub>2</sub> + I*(R cos - R sin ) |
| Answer» B. V<sub>2</sub> = V<sub>1</sub> + I*(R cos - X sin ) | |
| 4. |
Voltage regulation of transformer is given by _____________ |
| A. | E<sub>2</sub>-V<sub>2</sub>/V<sub>2</sub> |
| B. | E<sub>2</sub>-V<sub>2</sub>/E<sub>2</sub> |
| C. | V<sub>2</sub>-E<sub>2</sub>/E<sub>2</sub> |
| D. | V<sub>2</sub>-E<sub>2</sub>/V<sub>2</sub> |
| Answer» C. V<sub>2</sub>-E<sub>2</sub>/E<sub>2</sub> | |