MCQOPTIONS
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MCQOPTIONS
This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Machines knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
THE_DEVELOPED_ELECTROMAGNETIC_FORCE_AND/OR_TORQUE_IN_ELECTROMECHANICAL_ENERGY_CONVERSION_SYSTEM,_ACTS_IN_SUCH_A_DIRECTION_THAT_TENDS_TO____________?$ |
| A. | increase the stored energy at constant mmf |
| B. | decrease the stored energy at constant mmf |
| C. | decrease the co-energy at constant mmf |
| D. | increase the stored energy at constant flux |
| Answer» B. decrease the stored energy at constant mmf | |
| 2. |
A coupling magnetic field must react with |
| A. | electrical system in order to extract energy from mechanical system |
| B. | mechanical system in order to extract energy from mechanical system |
| C. | electrical system in order to extract energy from electrical system |
| D. | mechanical system in order to extract energy from electrical system |
| Answer» C. electrical system in order to extract energy from electrical system | |
| 3. |
In an electro-mechanical energy conversion device, the coupling field on the |
| A. | electrical side is associated with emf and current |
| B. | electrical side is associated with torque and speed |
| C. | mechanical side is associated with emf and current |
| D. | mechanical side is associated with torque and speed |
| Answer» E. | |
| 4. |
The formula for energy stored in the mechanical system of linear motion type is ______ |
| A. | 1/2 Jw<sub>r</sub><sup>2</sup> |
| B. | 1/2 mv<sup>2</sup> |
| C. | 1/2 mv |
| D. | Jw<sub>r</sub><sup>2</sup> |
| Answer» C. 1/2 mv | |
| 5. |
The energy storing capacity of magnetic field is about ________ times greater than that of electric field? |
| A. | 50,000 |
| B. | 25,000 |
| C. | 10,000 |
| D. | 40,000 |
| Answer» C. 10,000 | |
| 6. |
What is the coupling field used between the electrical and mechanical systems in an energy conversion devices? |
| A. | Magnetic field |
| B. | Electric field |
| C. | Magnetic field or Electric field |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 7. |
An electro-mechanical energy conversion device is one which converts _______ |
| A. | Electrical energy to mechanical energy only |
| B. | Mechanical energy to electrical energy only |
| C. | All of the mentioned |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |