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. |
What is the formula of the centrifugal force? |
| A. | centrifugal force = weight of revolving body * 39.43 * speed2 * radius of circular path |
| B. | centrifugal force = weight of revolving body / 39.43 * speed2 * radius of circular path |
| C. | centrifugal force = weight of revolving body * 39.43 / speed2 * radius of circular path |
| D. | centrifugal force = weight of revolving body * 39.43 * speed2 / radius of circular path |
| Answer» B. centrifugal force = weight of revolving body / 39.43 * speed2 * radius of circular path | |
| 2. |
What is the formula for the radius at the centre of gravity? |
| A. | radius at the centre of gravity = inner diameter1.5/6.3 |
| B. | radius at the centre of gravity = inner diameter2/6.3 |
| C. | radius at the centre of gravity = outer diameter1.5/6.3 |
| D. | radius at the centre of gravity = outer diameter2/6.3 |
| Answer» D. radius at the centre of gravity = outer diameter2/6.3 | |
| 3. |
In large machines, the thickness is relatively larger to the diameter. |
| A. | true |
| B. | false |
| Answer» C. | |
| 4. |
WHAT_IS_THE_FORMULA_FOR_THE_RADIUS_AT_THE_CENTRE_OF_GRAVITY??$ |
| A. | radius at the centre of gravity = inner diameter1.5/ 6.3 |
| B. | radius at the centre of gravity = inner diameter2/ 6.3 |
| C. | radius at the centre of gravity = outer diameter1.5/ 6.3 |
| D. | radius at the centre of gravity = outer diameter2/ 6.3 |
| Answer» D. radius at the centre of gravity = outer diameter2/ 6.3 | |
| 5. |
What_is_the_formula_of_the_centrifugal_force?$ |
| A. | centrifugal force = weight of revolving body * 39.43 * speed2* radius of circular path |
| B. | centrifugal force = weight of revolving body / 39.43 * speed2* radius of circular path |
| C. | centrifugal force = weight of revolving body * 39.43 / speed2* radius of circular path |
| D. | centrifugal force = weight of revolving body * 39.43 * speed2 / radius of circular path |
| Answer» B. centrifugal force = weight of revolving body / 39.43 * speed2* radius of circular path | |
| 6. |
What is the formula for the checking of rigidity of induction machines? |
| A. | moment of inertia ‚â• radius / length of stator core * 90 |
| B. | moment of inertia ‚â• radius * length of stator core * 90 |
| C. | moment of inertia ‚â• radius * length of stator core / 90 |
| D. | moment of inertia ≤ radius / length of stator core * 90 |
| Answer» D. moment of inertia ‚Äö√Ñ√∂‚àö¬¢¬¨√ü radius / length of stator core * 90 | |
| 7. |
What is the formula for the breadth of the ac machine? |
| A. | breadth = 6 + 0.01 * inner diameter of frame |
| B. | breadth = 6 – 0.01 * inner diameter of frame |
| C. | breadth = 6 * 0.01 * inner diameter of frame |
| D. | breadth = 6 / 0.01 * inner diameter of frame |
| Answer» B. breadth = 6 ‚Äö√Ñ√∂‚àö√ë‚àö¬® 0.01 * inner diameter of frame | |
| 8. |
What is the formula for the thickness of the ac machines? |
| A. | thickness = 40 * inner diameter of frame/12 |
| B. | thickness = 40 + inner diameter of frame/12 |
| C. | thickness = 40 – inner diameter of frame/12 |
| D. | thickness = 40 * inner diameter of frame*12 |
| Answer» B. thickness = 40 + inner diameter of frame/12 | |
| 9. |
What is the formula in order to check the rigidity? |
| A. | moment of inertia ‚â• (weight of magnetic frame * radius2 * 10-6) / 225 |
| B. | moment of inertia ≤ (weight of magnetic frame * radius2 * 10-6) / 225 |
| C. | moment of inertia = (weight of magnetic frame * radius2 * 10-6) / 225 |
| D. | moment of inertia < (weight of magnetic frame * radius2 * 10-6) / 225 |
| Answer» B. moment of inertia ‚Äö√Ñ√∂‚àö¬¢¬¨√ü (weight of magnetic frame * radius2 * 10-6) / 225 | |
| 10. |
In large machines, the thickness is relatively larger to the diameter? |
| A. | true |
| B. | false |
| Answer» C. | |
| 11. |
What is the formula for the depth of the yoke? |
| A. | depth of yoke = thickness/2 |
| B. | depth of yoke = thickness |
| C. | depth of yoke = 2*thickness |
| D. | depth of yoke = 3*thickness |
| Answer» C. depth of yoke = 2*thickness | |
| 12. |
Why is the length of the yoke made larger? |
| A. | to protect the armature windings |
| B. | to cover the armature windings |
| C. | to cover the field windings |
| D. | to cover and protect the field windings |
| Answer» E. | |
| 13. |
What is the work of the frame of dc machines? |
| A. | to reduce the voltage |
| B. | to reduce the flux |
| C. | to carry the flux |
| D. | to carry the current |
| Answer» D. to carry the current | |