MCQOPTIONS
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MCQOPTIONS
This section includes 15 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. |
1600 V rated 8 SCRs are connected in series. The operation voltage of the string is 4400. Calculate the string efficiency. |
| A. | 34.37 % |
| B. | 30.15 % |
| C. | 38.48 % |
| D. | 35.84 % |
| Answer» B. 30.15 % | |
| 2. |
Calculate the average value of thyristor current in 3- Full wave converter for the load current=729 A and =3 . |
| A. | 254 A |
| B. | 285 A |
| C. | 247 A |
| D. | 243 A |
| Answer» E. | |
| 3. |
Calculate the r.m.s value of thyristor current in 3- Full wave converter for the load current=2 A and =59 . |
| A. | 1.15 A |
| B. | 2.55 A |
| C. | 2.07 A |
| D. | 2.89 A |
| Answer» B. 2.55 A | |
| 4. |
Calculate the phase voltage for 3- 120 VSI if the value of DC supply is 78 V. |
| A. | 30.45 V |
| B. | 15.18 V |
| C. | 31.84 V |
| D. | 48.15 V |
| Answer» D. 48.15 V | |
| 5. |
Calculate the line voltage for 3- 120 VSI if the value of DC supply is 96 V. |
| A. | 68.25 V |
| B. | 67.87 V |
| C. | 66.25 V |
| D. | 62.14 V |
| Answer» C. 66.25 V | |
| 6. |
Calculate the rotational kinetic energy of the object using the data: I=5 Kg-m2, =25 rad/sec. |
| A. | 1.46 KJ |
| B. | 1.56 KJ |
| C. | 2.58 KJ |
| D. | 3.15 KJ |
| Answer» C. 2.58 KJ | |
| 7. |
Calculate Kinetic energy of the object of mass = 7 Kg moving in a straight line with a velocity of 12 m/s. |
| A. | 504 J |
| B. | 502 J |
| C. | 503 J |
| D. | 509 J |
| Answer» B. 502 J | |
| 8. |
Calculate the maximum fluctuation of speed using the data: Vmax=23 m/sec, Vmin=13 m/sec. |
| A. | 12 |
| B. | 10 |
| C. | 14 |
| D. | 15 |
| Answer» C. 14 | |
| 9. |
Calculate the coefficient of fluctuation of speed using the data: Vmax(Fluctuation)=25 m/sec, Vmean=12 m/sec. |
| A. | 2.08 |
| B. | 2.16 |
| C. | 2.34 |
| D. | 2.74 |
| Answer» B. 2.16 | |
| 10. |
Energy is stored in Flywheel in the form of __________ |
| A. | Kinetic energy |
| B. | Electrical energy |
| C. | Solar energy |
| D. | Wind energy |
| Answer» B. Electrical energy | |
| 11. |
Flywheel is analogous to ___________ |
| A. | Chemical battery |
| B. | Mechanical battery |
| C. | Nuclear battery |
| D. | Electrostatic battery |
| Answer» C. Nuclear battery | |
| 12. |
Full form of IGBT is ___________ |
| A. | Insulated gate bipolar transistor |
| B. | Insulated gate bipolar transducer |
| C. | Insulator gate bidirectional transducer |
| D. | Insulated gate bidirectional transistor |
| Answer» B. Insulated gate bipolar transducer | |
| 13. |
Full form of KERS is ___________ |
| A. | The kinetic energy recovery system |
| B. | The kinetic ever recovery system |
| C. | Kin ever recovery system |
| D. | The kinetic energy recovery store |
| Answer» B. The kinetic ever recovery system | |
| 14. |
Short circuit problem is severe in case of current source inverter. |
| A. | True |
| B. | False |
| Answer» C. | |
| 15. |
Rectifiers are used to convert DC power into variable AC power. |
| A. | True |
| B. | False |
| Answer» C. | |