MCQOPTIONS
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MCQOPTIONS
This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Dc Machines knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which coil is shorted in commutation process? |
| A. | Coil under north pole |
| B. | Coil under south pole |
| C. | Coil lying in an interpolar region |
| D. | Cannot be determined |
| Answer» D. Cannot be determined | |
| 2. |
How many coil sets undergo commutation simultaneously in a wave winding? |
| A. | 1 |
| B. | 2 |
| C. | 4 |
| D. | 3 |
| Answer» C. 4 | |
| 3. |
The process of current reversal takes place when the coil is passing through the interpolar region. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
In wave winding, P/2 coils are connected under the influence of x pole-pairs which connect adjacent segments. X is ____ |
| A. | P |
| B. | P/2 |
| C. | 2P |
| D. | P/4 |
| Answer» C. 2P | |
| 5. |
To achieve spark less commutation brushes of a DC generator are placed ________ |
| A. | just ahead of magnetic neutral axis |
| B. | in magnetic neutral axis |
| C. | just behind the magnetic neutral axis |
| D. | can be placed anywhere |
| Answer» B. in magnetic neutral axis | |