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. |
For 6252 AT/Poles, if brush shift is of 2.50 mech. Degrees, what will be the cross-magnetizing ampere-turns per pole for a 6-pole DC machine? |
| A. | 521 |
| B. | 5731 |
| C. | 5231 |
| D. | 571 |
| Answer» C. 5231 | |
| 2. |
For 6252 AT/Poles, if brush shift is of 2.50 mech. Degrees, what will be the demagnetizing ampere-turns per pole for a 6-pole DC machine? |
| A. | 521 |
| B. | 5731 |
| C. | 5231 |
| D. | 571 |
| Answer» B. 5731 | |
| 3. |
What is the total ampere turns per pole for 720 lap wounded conductors with carrying armature current equal to 625A in a 6-pole machine? |
| A. | 6252 AT/pole |
| B. | 625.2 AT/pole |
| C. | 62.52 AT/pole |
| D. | 8252 AT/pole |
| Answer» B. 625.2 AT/pole | |
| 4. |
If total ampere turns per pole is equal to 6000 A-turns, peak ampere turns for a 4-pole machine is _____ |
| A. | 24000 |
| B. | 3000 |
| C. | 1500 |
| D. | 4500 |
| Answer» D. 4500 | |
| 5. |
What is the total ampere turns/pole (in AT/pole) if 600 lap wound conductors carry 120A current through conductors (P=4)? |
| A. | 18000 |
| B. | 9000 |
| C. | 4500 |
| D. | 13500 |
| Answer» C. 4500 | |
| 6. |
Flux density in the interpolar region drops down because of ______ |
| A. | AT<sub>a</sub> (peak) |
| B. | Large air gap |
| C. | Absence of magnetic poles |
| D. | Depends on other parameters |
| Answer» C. Absence of magnetic poles | |