MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Electric Drives knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Calculate the value of the short circuit ratio if the per unit value of synchronous reactance is 1 Ω. Assume armature resistance is 0 ohm. |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 2. |
Calculate the value of the short circuit ratio if the per unit value of synchronous reactance is 4.2 Ω. |
| A. | 0.26 |
| B. | 0.23 |
| C. | 0.67 |
| D. | 0.72 |
| Answer» C. 0.67 | |
| 3. |
Calculate the value of the time period if the frequency of the signal is 58 sec. |
| A. | .017 sec |
| B. | .014 sec |
| C. | .045 sec |
| D. | .077 sec |
| Answer» B. .014 sec | |
| 4. |
1 Horse-power is equal to _______ |
| A. | 745.7 W |
| B. | 741 W |
| C. | 747.7 W |
| D. | 740 W |
| Answer» B. 741 W | |
| 5. |
1 calorie is equal to ________ |
| A. | 4.18 J |
| B. | 5.23 J |
| C. | 6.23 J |
| D. | 8 J |
| Answer» B. 5.23 J | |
| 6. |
Calculate the value of the power if voltage=4.2 V and current=10 A. |
| A. | 42 W |
| B. | 12 W |
| C. | 16 W |
| D. | 18 W |
| Answer» B. 12 W | |
| 7. |
The slope of the I-V curve is 160°. Calculate the value of resistance. |
| A. | .36 Ω |
| B. | .41 Ω |
| C. | .89 Ω |
| D. | 2.74 Ω |
| Answer» E. | |
| 8. |
Calculate the reactive power in a 29.6 Ω resistor. |
| A. | 45.1 VAR |
| B. | 41.1 VAR |
| C. | 46 VAR |
| D. | 0 VAR |
| Answer» E. | |
| 9. |
Calculate the value of the resistance of a wire of length = 12 m, area = 2 m2 and Ρ = 6 Ω-m. |
| A. | 36 Ω |
| B. | 6 Ω |
| C. | 26 Ω |
| D. | 10 Ω |
| Answer» B. 6 Ω | |
| 10. |
Calculate the reactive power in an 84 MΩ resistor. |
| A. | 1.47 VAR |
| B. | 45.6 VAR |
| C. | 0.59 VAR |
| D. | 0 VAR |
| Answer» E. | |
| 11. |
Calculate the power factor if the power angle is 12°. |
| A. | 0.87 |
| B. | .47 |
| C. | .97 |
| D. | 0 |
| Answer» D. 0 | |
| 12. |
The unit of SCR is Ω. |
| A. | True |
| B. | False |
| Answer» C. | |
| 13. |
A higher value of armature reaction means the lower value of the short circuit ratio. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 14. |
Calculate the value of the short circuit ratio if the per unit value of synchronous reactance is 1.5 Ω. |
| A. | 0.66 |
| B. | 0.33 |
| C. | 0.17 |
| D. | 0.12 |
| Answer» B. 0.33 | |