MCQOPTIONS
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MCQOPTIONS
This section includes 15 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 for the area per pole of damper pass provided? |
| A. | area per pole of damper pass = 0.2 * specific electric loading * pole pitch * current density in damper bars |
| B. | area per pole of damper pass = 0.2 * specific electric loading * pole pitch / current density in damper bars |
| C. | area per pole of damper pass = 0.2 * specific electric loading – pole pitch / current density in damper bars |
| D. | area per pole of damper pass = 0.2 + specific electric loading * pole pitch / current density in damper bars |
| Answer» C. area per pole of damper pass = 0.2 * specific electric loading – pole pitch / current density in damper bars | |
| 2. |
The mmf of the damper windings depends on the pole pitch value. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 3. |
The damper windings are made use of in synchronous generators to reduce the oscillations and to prevent hunting. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 4. |
What is the range of the ratio of radial length of pole to pole pitch? |
| A. | 0.3-1 |
| B. | 0.3-1.5 |
| C. | 0.7-1 |
| D. | 0.7-1.5 |
| Answer» C. 0.7-1 | |
| 5. |
What is the formula for the height of pole body? |
| A. | height of pole body = height of the winding + 0.02 |
| B. | height of pole body = height of the winding * 0.02 |
| C. | height of pole body = height of the winding – 0.02 |
| D. | height of pole body = height of the winding / 0.02 |
| Answer» B. height of pole body = height of the winding * 0.02 | |
| 6. |
What is the formula for the radial length of the pole shoe? |
| A. | radial length of the pole shoe = height of winding – height of pole shoe – 0.02 |
| B. | radial length of the pole shoe = height of winding + height of pole shoe – 0.02 |
| C. | radial length of the pole shoe = height of winding – height of pole shoe + 0.02 |
| D. | radial length of the pole shoe = height of winding + height of pole shoe + 0.02 |
| Answer» E. | |
| 7. |
What is the formula for the height of winding? |
| A. | height of winding = total winding area / depth of winding |
| B. | height of winding = total winding area * depth of winding |
| C. | height of winding = total winding area + depth of winding |
| D. | height of winding = total winding area – depth of winding |
| Answer» B. height of winding = total winding area * depth of winding | |
| 8. |
What is the value of space factor for the strip on edge winding? |
| A. | 0.8-0.9 |
| B. | 0.4 |
| C. | 0.65 |
| D. | 0.75 |
| Answer» B. 0.4 | |
| 9. |
What is the formula for the total space required for the winding? |
| A. | total space = copper area + space factor |
| B. | total space = copper area – space factor |
| C. | total space = copper area / space factor |
| D. | total space = copper area * space factor |
| Answer» D. total space = copper area * space factor | |
| 10. |
What is the formula for the copper area of the field windings? |
| A. | copper area = full load field mmf * current density in the field winding |
| B. | copper area = full load field mmf / current density in the field winding |
| C. | copper area = full load field mmf + current density in the field winding |
| D. | copper area = full load field mmf – current density in the field winding |
| Answer» C. copper area = full load field mmf + current density in the field winding | |
| 11. |
What is the formula for the area of cross-section of pole body for rectangular poles? |
| A. | area of cross section of pole body = 0.98 * axial length of the pole * breadth of the pole |
| B. | area of cross section of pole body = 0.98 / axial length of the pole * breadth of the pole |
| C. | area of cross section of pole body = 0.98 * axial length of the pole / breadth of the pole |
| D. | area of cross section of pole body = 1/0.98 * axial length of the pole * breadth of the pole |
| Answer» B. area of cross section of pole body = 0.98 / axial length of the pole * breadth of the pole | |
| 12. |
What is the range of the leakage coefficient in the pole body? |
| A. | 1.1 to 1.2 |
| B. | 1.00 to 1.5 |
| C. | 1.15 to 1.2 |
| D. | 0.75 to 2.3 |
| Answer» D. 0.75 to 2.3 | |
| 13. |
What is the range of the permissible values of the flux densities in pole body? |
| A. | 1.4-1.7 Wb per m2 |
| B. | 1.5-1.7 Wb per m2 |
| C. | 1.4-1.6 Wb per m2 |
| D. | 1.5-1.6 Wb per m2 |
| Answer» C. 1.4-1.6 Wb per m2 | |
| 14. |
What is the formula for the flux in pole body? |
| A. | flux in pole body = leakage coefficient * useful flux per pole |
| B. | flux in pole body = leakage coefficient / useful flux per pole |
| C. | flux in pole body = leakage coefficient – useful flux per pole |
| D. | flux in pole body = leakage coefficient + useful flux per pole |
| Answer» B. flux in pole body = leakage coefficient / useful flux per pole | |
| 15. |
How many factors does the design of rotor of synchronous machines depend upon? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» D. 5 | |