MCQOPTIONS
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MCQOPTIONS
This section includes 6 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. |
How total number of brushes in a commutator are determined in a given DC machine? |
| A. | Speed of armature |
| B. | Type of winding |
| C. | Voltage |
| D. | Amount of current to be collected |
| Answer» E. | |
| 2. |
In case of DC machine winding, number of commutator segments is equal to ______ |
| A. | Number of armature coils |
| B. | Number of armature coil sides |
| C. | Number of armature conductors |
| D. | Number of armature turns |
| Answer» B. Number of armature coil sides | |
| 3. |
Which conductors are in point of contact with brushes? |
| A. | Lie under south pole |
| B. | Lie under north pole |
| C. | Lie in inter polar region |
| D. | Are farthest from the poles |
| Answer» D. Are farthest from the poles | |
| 4. |
What are the number of the brushes in the wave winding? |
| A. | Same or more than the number of poles |
| B. | Same or less than the number of poles |
| C. | Exactly half the number of poles |
| D. | Depends on other parameters |
| Answer» B. Same or less than the number of poles | |
| 5. |
In DC generators, current is fed up to the external circuit from armature through _______ |
| A. | Commutator |
| B. | Direct wire |
| C. | Slip rings |
| D. | Cannot be determined |
| Answer» B. Direct wire | |
| 6. |
1.The armature in DC machines is always placed on rotor because _______ |
| A. | Otherwise commutation will not be possible |
| B. | Otherwise there will not be any induced emf |
| C. | Otherwise current will not flow |
| D. | Can be placed anywhere |
| Answer» B. Otherwise there will not be any induced emf | |