MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 9 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 phase angle of the sinusoidal waveform y(t)=55sin(4πt+π÷8). |
| A. | π÷8 |
| B. | π÷5 |
| C. | π÷7 |
| D. | π÷4 |
| Answer» B. π÷5 | |
| 2. |
Calculate the useful power developed by a motor using the given data: Pin = 3000 W, Ia = 60 A, Ra = .4 Ω. Assume frictional losses are 200 W and windage losses are 400 W. |
| A. | 970 W |
| B. | 960 W |
| C. | 980 W |
| D. | 990 W |
| Answer» C. 980 W | |
| 3. |
Which of the following devices should be used as a switch for high power and high voltage application? |
| A. | GTO |
| B. | MOSFET |
| C. | TRIAC |
| D. | Thyristor |
| Answer» E. | |
| 4. |
The turn-off times of the devices in the increasing order is ___________I. MOSFETII. BJTIII. IGBTIV. Thyristor |
| A. | I, III, II, IV |
| B. | I, II, III, IV |
| C. | III, I, II, IV |
| D. | III, II, IV, I |
| Answer» B. I, II, III, IV | |
| 5. |
Calculate the time period of the waveform x(t)=24sin(24πt+π÷4). |
| A. | .064 sec |
| B. | .047 sec |
| C. | .083 sec |
| D. | .015 sec |
| Answer» D. .015 sec | |
| 6. |
R.M.S value of the sinusoidal waveform V=Vmsin(ωt+α). |
| A. | Vm÷2½ |
| B. | Vm÷2¼ |
| C. | Vm÷2¾ |
| D. | Vm÷3½ |
| Answer» B. Vm÷2¼ | |
| 7. |
The unit of angular velocity is rad/s3. |
| A. | True |
| B. | False |
| Answer» C. | |
| 8. |
Load torque of the crane is independent of _________ |
| A. | Speed |
| B. | Seebeck effect |
| C. | Hall effect |
| D. | Thomson effect |
| Answer» B. Seebeck effect | |
| 9. |
Servo motors are an example of which type of load? |
| A. | Pulsating loads |
| B. | Short time loads |
| C. | Impact loads |
| D. | Short time intermittent loads |
| Answer» C. Impact loads | |