MCQOPTIONS
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MCQOPTIONS
This section includes 21 Mcqs, each offering curated multiple-choice questions to sharpen your Design Electrical Machines knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is ‘Z/Sa’ calculation during design of armatures? |
| A. | armature poles/slots |
| B. | armature conductors/slots |
| C. | armature slots/poles |
| D. | armature slots/conductors |
| Answer» C. armature slots/poles | |
| 2. |
What should be the range of the integer value while calculating the formula to reduce the flux pulsations? |
| A. | 8-14 |
| B. | 9-15 |
| C. | 9-16 |
| D. | 9-17 |
| Answer» D. 9-17 | |
| 3. |
The number of coils chosen should be minimum in number. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 4. |
What is the formula to reduce flux pulsations? |
| A. | armature slot/number of poles = integer |
| B. | armature slot/number of poles = integer + 0.5 |
| C. | armature slot/number of poles = integer – 0.5 |
| D. | armature slot/number of poles = integer +-0.5 |
| Answer» E. | |
| 5. |
The choosing of the slot values for armature depends on the type of windings. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 6. |
A 4 pole DC machine has 36 number of armature conductors. What is the pole pitch? |
| A. | 9 |
| B. | 1/9 |
| C. | 92 |
| D. | 1/92 |
| Answer» B. 1/9 | |
| 7. |
WHAT_IS_THE_FORMULA_TO_REDUCE_FLUX_PULSATIONS??$ |
| A. | armature slot/number of poles = integer |
| B. | armature slot/number of poles = integer + 0.5 |
| C. | armature slot/number of poles = integer – 0.5 |
| D. | armature slot/number of poles = integer +-0.5 |
| Answer» E. | |
| 8. |
What should be the range of the integer value while calculating the formula to reduce the flux pulsations?$ |
| A. | 8-14 |
| B. | 9-15 |
| C. | 9-16 |
| D. | 9-17 |
| Answer» D. 9-17 | |
| 9. |
The number of coils chosen should be minimum in number?$ |
| A. | true |
| B. | false |
| Answer» B. false | |
| 10. |
For a DC generator, given the load current is 510 ampere, field current is 1.4 ampere. What is the value of armature current? |
| A. | 508.6 ampere |
| B. | 714 ampere |
| C. | 511.4 ampere |
| D. | 364.28 ampere |
| Answer» D. 364.28 ampere | |
| 11. |
Given Z=228 conductors, number of coils C=38 for a DC machine. What is the turns/coils ratio? |
| A. | 4 |
| B. | 3 |
| C. | 7 |
| D. | 3 |
| Answer» E. | |
| 12. |
What is the formula for calculating the minimum number of coils? |
| A. | Cmin = Voltage |
| B. | Cmin = Voltage/5 |
| C. | Cmin = Voltage/10 |
| D. | Cmin = Voltage/15 |
| Answer» E. | |
| 13. |
What is ‘Z/Sa’ calculation during design of armatures?$ |
| A. | armature poles/slots |
| B. | armature conductors/slots |
| C. | armature slots/poles |
| D. | armature slots/conductors |
| Answer» C. armature slots/poles | |
| 14. |
For a DC machine, the armature slot pitch is 35mm and the diameter is 0.2m. What is the number of armature slots for the machine? |
| A. | 17 |
| B. | 18 |
| C. | 19 |
| D. | 20 |
| Answer» C. 19 | |
| 15. |
What is the range of armature slot pitch in the armature slot design? |
| A. | 20mm – 25mm |
| B. | 25mm – 35mm |
| C. | 30mm – 35mm |
| D. | > 35mm |
| Answer» C. 30mm ‚Äö√Ñ√∂‚àö√ë‚àö¬® 35mm | |
| 16. |
What is the condition for choosing the armature current/parallel path in armature design? |
| A. | > 200 ampere for both lap and wave windings |
| B. | >200 ampere for lap winding, <200 ampere for wave winding |
| C. | < 200 ampere for both lap and wave windings |
| D. | <200 ampere for lap winding, >200 ampere for wave winding |
| Answer» D. <200 ampere for lap winding, >200 ampere for wave winding | |
| 17. |
The choosing of the slot values for armature depends on the type of windings? |
| A. | true |
| B. | false |
| Answer» B. false | |
| 18. |
A 4 pole DC machine has 36 number of armature conductors. What is the pole pitch ? |
| A. | 9 |
| B. | 1/9 |
| C. | 92 |
| D. | 1/92 |
| Answer» B. 1/9 | |
| 19. |
What is the meaning of pole pitch? |
| A. | type of armature slot |
| B. | number of armature slots/pole |
| C. | number of poles/armature slot |
| D. | number of poles/number of armature slots |
| Answer» C. number of poles/armature slot | |
| 20. |
Which factor determines the difference between the types of armature windings? |
| A. | brush connection |
| B. | slip ring connection |
| C. | commutator connection |
| D. | pole connection |
| Answer» D. pole connection | |
| 21. |
How many type of armature windings are present in the DC machine armature? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» B. 3 | |