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. |
The value of the slip of an induction motor during full load condition is ________ |
| A. | 0.99 |
| B. | .1 |
| C. | .8 |
| D. | 0 |
| Answer» E. | |
| 2. |
The value of slip at the starting of an induction motor is ________ |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» C. 2 | |
| 3. |
Calculate the value of resistance if total heat dissipated is 78 W when 5 A current flows through it. |
| A. | 3.12 |
| B. | 2.24 |
| C. | 1.45 |
| D. | 5.13 |
| Answer» B. 2.24 | |
| 4. |
Calculate the time period of the waveform v(t)=.6sin(.1 t+8 )+17cos(2 t+ )+ 4tan(.1 t). |
| A. | 88 sec |
| B. | 20 sec |
| C. | 70 sec |
| D. | 43 sec |
| Answer» C. 70 sec | |
| 5. |
Calculate the value of capacitive reactance if F=60 Hz and C=14 H. |
| A. | 189.5 m |
| B. | 252.4 m |
| C. | 244.5 m |
| D. | 244.8 m |
| Answer» B. 252.4 m | |
| 6. |
Calculate the value of inductive reactance if F=50 Hz and L=12 H. |
| A. | 3768 t |
| B. | 2578 |
| C. | 2477 |
| D. | 2456 |
| Answer» B. 2578 | |
| 7. |
If induction motor air gap power is 28.63 KW and gross developed power is 18.8 KW, then rotor ohmic loss will be _________ KW. |
| A. | 9.83 |
| B. | 10.55 |
| C. | 15.54 |
| D. | 4.74 |
| Answer» B. 10.55 | |
| 8. |
The slope of the V-I curve is 56.489 . Calculate the value of resistance. Assume the relationship between voltage and current is a straight line. |
| A. | 1.5 |
| B. | 1.6 |
| C. | 2.5 |
| D. | 1.4 |
| Answer» B. 1.6 | |
| 9. |
The V/F control is a part of the synchronous speed changing technique. |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
Calculate the time period of the waveform y(t)=sin(.1 t)+cos(.2 t). |
| A. | 20 sec |
| B. | 30 sec |
| C. | 40 sec |
| D. | 10 sec |
| Answer» B. 30 sec | |
| 11. |
R.M.S value of the periodic square waveform of amplitude 20 V is _______ |
| A. | 20 V |
| B. | 18 V |
| C. | 17 V |
| D. | 13 V |
| Answer» B. 18 V | |
| 12. |
Calculate the average value of the sinusoidal waveform y(t)=4.56cos(77.64 t+4800 68). |
| A. | 41 V |
| B. | 0 V |
| C. | 48 V |
| D. | 78 V |
| Answer» C. 48 V | |
| 13. |
Calculate the value of new slip using the given data: V1=12 V, S1=.1, V2=5. |
| A. | 0.576 |
| B. | 0.247 |
| C. | 0.487 |
| D. | 0.987 |
| Answer» B. 0.247 | |
| 14. |
The stator voltage control method is a part of the slip changing technique. |
| A. | True |
| B. | False |
| Answer» B. False | |