MCQOPTIONS
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MCQOPTIONS
This section includes 20 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. |
The rotor is slotted for one-third of its periphery. |
| A. | true |
| B. | false |
| Answer» C. | |
| 2. |
What is the use of the slot in the rotor? |
| A. | for inserting the field windings |
| B. | for inserting the armature windings |
| C. | for securing the field windings |
| D. | for inserting and securing the field windings |
| Answer» E. | |
| 3. |
The overhang has to be highly reinforced in turbo alternators. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 4. |
What is the voltage range for large turbo-alternators? |
| A. | 15-20 kV |
| B. | 18-23 kV |
| C. | 20-23 kV |
| D. | 20-25 kV |
| Answer» E. | |
| 5. |
What is the use of the laminated and transposed conductors in turbo alternators? |
| A. | to decrease the harmonics |
| B. | to decrease the heating effects |
| C. | to decrease the iron and core loss |
| D. | to decrease the eddy current loss |
| Answer» E. | |
| 6. |
WHAT_IS_THE_VOLTAGE_RANGE_FOR_LARGE_TURBO-ALTERNATORS??$ |
| A. | 15-20 kV |
| B. | 18-23 kV |
| C. | 20-23 kV |
| D. | 20-25 kV |
| Answer» E. | |
| 7. |
WHAT_IS_THE_USE_OF_THE_LAMINATED_AND_TRANSPOSED_CONDUCTORS_IN_TURBO_ALTERNATORS??$ |
| A. | to decrease the harmonics |
| B. | to decrease the heating effects |
| C. | to decrease the iron and core loss |
| D. | to decrease the eddy current loss |
| Answer» E. | |
| 8. |
What is the use of the slot in the rotor?$ |
| A. | for inserting the field windings |
| B. | for inserting the armature windings |
| C. | for securing the field windings |
| D. | for inserting and securing the field windings |
| Answer» E. | |
| 9. |
The overhang has to be highly reinforced in turbo alternators?$ |
| A. | true |
| B. | false |
| Answer» B. false | |
| 10. |
What is the mechanical strength of the end bells used? |
| A. | 1120 MN per m<sup>2</sup> |
| B. | 1130 MN per m<sup>2</sup> |
| C. | 1150 MN per m<sup>2</sup> |
| D. | 1140 MN per m<sup>2</sup> |
| Answer» D. 1140 MN per m<sup>2</sup> | |
| 11. |
The rotor is slotted for one-third of its periphery? |
| A. | true |
| B. | false |
| Answer» C. | |
| 12. |
How many types are the rotor slots distinguished into? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» B. 3 | |
| 13. |
What is the pulsational force produced for 500 MW machine? |
| A. | 70 kN per m |
| B. | 60 kN per m |
| C. | 80 kN per m |
| D. | 90 kN per m |
| Answer» D. 90 kN per m | |
| 14. |
What is the advantage of the grain oriented steel laminations? |
| A. | it lowers the iron loss |
| B. | it lowers the core loss |
| C. | it lowers the heating effects |
| D. | it lowers the harmonics |
| Answer» C. it lowers the heating effects | |
| 15. |
What type of lamination is used for the stator core of the turbo alternators? |
| A. | stepped |
| B. | smooth |
| C. | interleaved |
| D. | segmental |
| Answer» E. | |
| 16. |
What is the outer diameter of the stator core and outer casing of 500 MW turbo alternator? |
| A. | 5 m , 2 m |
| B. | 6 m, 5 m |
| C. | 3 m, 4 m |
| D. | 4 m, 7 m |
| Answer» D. 4 m, 7 m | |
| 17. |
What is the core length and the shaft length of a 500 MW turbo alternator? |
| A. | 5 m , 12 m |
| B. | 6 m, 15 m |
| C. | 3 m, 10 m |
| D. | 4 m, 13 m |
| Answer» B. 6 m, 15 m | |
| 18. |
What is the relation of the lengths and diameters with the turbo-alternators? |
| A. | long length, long diameters |
| B. | long length, short diameters |
| C. | short lengths, short diameters |
| D. | short lengths, long diameters |
| Answer» C. short lengths, short diameters | |
| 19. |
How many poles does the turbo-alternators have and what is the speed of the turbo alternators? |
| A. | 4 poles, 3000 rpm |
| B. | 3 poles, 6000 rpm |
| C. | 2 poles, 5000 rpm |
| D. | 2 poles, 3000 rpm |
| Answer» E. | |
| 20. |
How many factors does the construction of the turbo alternators depend upon? |
| A. | 2 |
| B. | 4 |
| C. | 3 |
| D. | 6 |
| Answer» D. 6 | |