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 bandwidth in series RLC circuit if the frequency is 20 Hz and the quality factor is 5. |
| A. | 2 Hz |
| B. | 4 Hz |
| C. | 6 Hz |
| D. | 8 Hz |
| Answer» C. 6 Hz | |
| 2. |
The value of current at time of starting is ___________ |
| A. | High |
| B. | Low |
| C. | Very low |
| D. | 0 |
| Answer» B. Low | |
| 3. |
The relationship between the torque(T) and power(P) developed in the DC shunt motor is ___________ (Neglecting all the losses) |
| A. | T P |
| B. | T P<sup>2</sup> |
| C. | T P |
| D. | T P |
| Answer» E. | |
| 4. |
The shape of the current-torque characteristics in DC shunt motor is __________ |
| A. | Rectangular Hyperbola |
| B. | Parabola |
| C. | Straight line |
| D. | Ellipse |
| Answer» D. Ellipse | |
| 5. |
DC shunt motors are used where the high _________ is required. |
| A. | Starting torque |
| B. | Maximum torque |
| C. | Minimum torque |
| D. | Breakdown torque |
| Answer» B. Maximum torque | |
| 6. |
The shape of the speed-torque characteristics in DC shunt motor is __________ |
| A. | Rectangular Hyperbolic |
| B. | Whole x-y plane |
| C. | Circle |
| D. | Ellipse |
| Answer» B. Whole x-y plane | |
| 7. |
The shape of the speed-armature current characteristics in DC shunt motor is __________ |
| A. | Hyperbolic |
| B. | Parabola |
| C. | Negative slope linear line |
| D. | Ellipse |
| Answer» D. Ellipse | |
| 8. |
Calculate the flux produced by the DC shunt field winding using the following data: Ia=5 A, IL=11, R=2, N=4. |
| A. | 14 Wb |
| B. | 12 Wb |
| C. | 17 Wb |
| D. | 18 Wb |
| Answer» C. 17 Wb | |
| 9. |
Calculate the current in DC shunt field winding using the following data: Ia=15 A, IL=21, R=22, N=484. |
| A. | 4 A |
| B. | 2 A |
| C. | 7 A |
| D. | 6 A |
| Answer» E. | |
| 10. |
Full form of TVR is _________ |
| A. | Terminal voltage reversal |
| B. | Total voltage reversal |
| C. | Terminal voltage redirect |
| D. | Total voltage reversal |
| Answer» B. Total voltage reversal | |
| 11. |
Torque developed in the motor is ___________ |
| A. | K<sub>m</sub> I<sub>a</sub> |
| B. | K<sub>m</sub> I<sub>a</sub><sup>3</sup> |
| C. | 2K<sub>m</sub> I<sub>a</sub> |
| D. | K<sub>m</sub> I<sub>a</sub><sup>2</sup> |
| Answer» B. K<sub>m</sub> I<sub>a</sub><sup>3</sup> | |
| 12. |
Braking resistance should be selected in order to limit the braking current. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 13. |
In DC shunt machine is directly proportional to Ia. |
| A. | True |
| B. | False |
| Answer» C. | |
| 14. |
Plugging is suitable for __________ type loads. |
| A. | Gravitational |
| B. | Electrostatic |
| C. | Weightless |
| D. | Leading |
| Answer» B. Electrostatic | |