MCQOPTIONS
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MCQOPTIONS
This section includes 10 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_SINGLE_PHASE_RELUCTANCE_MACHINE_ACTS_AS_A_GENERATOR_WHEN_ANGLE_‚ÂÀ√≠¬¨‚Ä¢_IS________?$# |
| A. | positive |
| B. | negative |
| C. | zero |
| D. | any of the mentioned |
| Answer» C. zero | |
| 2. |
If the salient pole rotor in a single phase reluctance motor is replaced by a cylindrical rotor, then$ |
| A. | reluctance offered to stator flux remains constant for all rotor positions |
| B. | no reluctance torque will be developed |
| C. | reluctance torque will be developed |
| D. | reluctance offered to stator flux changes for all rotor positions |
| Answer» B. no reluctance torque will be developed | |
| 3. |
Single_phase_reluctance_motors_are_extensively_used_in_________$ |
| A. | grinder applications |
| B. | driving electric clocks and other timing devices |
| C. | welding applications |
| D. | lifts/ elevators |
| Answer» C. welding applications | |
| 4. |
For a given reluctance motor, Rld and Rlq are _______? |
| A. | constant |
| B. | varying |
| C. | zero |
| D. | any of the mentioned |
| Answer» B. varying | |
| 5. |
For a reluctance motor , the maximum average torque occurs when δ= __________$ |
| A. | 45° |
| B. | 90° |
| C. | 0° |
| D. | 180° |
| Answer» B. 90¬¨¬®‚Äö√†√ª | |
| 6. |
Reluctance motor can produce torque at ________ |
| A. | any speed less than synchronous speed |
| B. | synchronous speed only |
| C. | any speed greater than synchronous speed |
| D. | any of the mentioned |
| Answer» C. any speed greater than synchronous speed | |
| 7. |
The variation of reluctance Rl with space angle θr depends on the shape of __________$ |
| A. | stator poles |
| B. | rotor poles |
| C. | stator or rotor poles |
| D. | both stator and rotor poles |
| Answer» E. | |
| 8. |
The reluctance offered to the stator flux by two very large air gaps in series with high permeability iron, in reluctance machine is maximum, when the space angle θr = ______$ |
| A. | 0° |
| B. | 45° |
| C. | 90° |
| D. | 180° |
| Answer» D. 180¬¨¬®‚Äö√†√ª | |
| 9. |
Space angle, θr is measured between stator d-axis and _____$ |
| A. | quadrature axis |
| B. | direct d-axis |
| C. | long rotor axis |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 10. |
What is the angle between stator direct axis and quadrature axis ? |
| A. | 90° |
| B. | 0° |
| C. | 45° |
| D. | any of the mentioned |
| Answer» B. 0¬¨¬®‚Äö√†√ª | |