MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 13 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 width of each duct is about 8 to 10 mm. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 2. |
What is the range of the core length for which the stator is provided with the ventilating ducts? |
| A. | 105-120 mm |
| B. | 100-120 mm |
| C. | 100-150 mm |
| D. | 100-125 mm |
| Answer» E. | |
| 3. |
What are the parameters which come under the term “Main Dimensions”? |
| A. | diameter |
| B. | length |
| C. | diameter and length |
| D. | area |
| Answer» D. area | |
| 4. |
WHAT_IS_THE_RANGE_OF_THE_CORE_LENGTH_FOR_WHICH_THE_STATOR_IS_PROVIDED_WITH_THE_VENTILATING_DUCTS??$ |
| A. | 105-120 mm |
| B. | 100-120 mm |
| C. | 100-150 mm |
| D. | 100-125 mm |
| Answer» E. | |
| 5. |
The width of each duct is about 8 to 10 mm?$ |
| A. | true |
| B. | false |
| Answer» B. false | |
| 6. |
What is the maximum permissible level for the peripheral speed for a normal design? |
| A. | < 30 m per s |
| B. | > 30 m per s |
| C. | <=30 m per s |
| D. | >=30 m per s |
| Answer» D. >=30 m per s | |
| 7. |
What is the range of the permissible peripheral speeds in the 3 phase induction machine? |
| A. | 60-75 m per s |
| B. | 60-70 m per s |
| C. | 40-70 m per s |
| D. | 50-70 m per s |
| Answer» B. 60-70 m per s | |
| 8. |
What is the Relation between pole pitch and the core length in terms of the best power factor? |
| A. | pole pitch = (0.18 * core length)<sup>3</sup> |
| B. | pole pitch = (0.18 * core length)<sup>2</sup> |
| C. | pole pitch = (0.18 * core length)<sup>1/2</sup> |
| D. | pole pitch = (0.18 * core length)<sup>1/3</sup> |
| Answer» D. pole pitch = (0.18 * core length)<sup>1/3</sup> | |
| 9. |
What are the factors the value of core length to pole pitch depend upon? |
| A. | area of the slots |
| B. | size of machine |
| C. | size of conductors |
| D. | size of machine, minimum cost, good efficiency |
| Answer» E. | |
| 10. |
What is the relation between motors and ratio of core length to pole pitch? |
| A. | for small motors high ratio is preferred |
| B. | for big motors high ratio is preferred |
| C. | for small motors small ratio is preferred |
| D. | for big motors small ratio is preferred |
| Answer» D. for big motors small ratio is preferred | |
| 11. |
What is the value of the ratio of the core length to pole pitch for good efficiency? |
| A. | 1 |
| B. | 1.5 |
| C. | 2 |
| D. | 3 |
| Answer» C. 2 | |
| 12. |
What is the range of the ratio of the core length to pole pitch for minimum cost? |
| A. | 1.5-2 |
| B. | 1-2 |
| C. | 1.0-1.25 |
| D. | 2-2.5 |
| Answer» B. 1-2 | |
| 13. |
What are the parameters which come under the term “Main Dimensions”? |
| A. | diameter |
| B. | length |
| C. | diameter and length |
| D. | area |
| Answer» D. area | |