3-PHASE INDUCTION MOTOR - 5
3-Phase Induction Motor Quiz
Test your knowledge of 3-phase induction motors with our comprehensive quiz designed for both students and professionals in the electrical engineering field. Learn more about the intricacies and operational principles of induction motors while assessing your understanding.
- 10 Questions on key concepts
- Multiple choice format for easy answering
- Instant feedback on your answers
41. The low power factor of induction motor is due to ___________
Rotor leakage reactance
Stator reactance
The reactive lagging magnetizing current necessary to generate the magnetic flux
All of the above
42. Less maintenance troubles are experienced in case of ____________
Slip ring induction motor
Squirrel cage induction motor
Both a & b
None of the above
43. A squirrel cage induction motor is not selected when ____________
Initial cost is the main consideration
Maintenance cost is to be kept low
Higher starting torque is the main consideration
All above consideration are involved
44. In a star/delta starter of an induction motor __________
Resistance is inserted in the stator
Reduced voltage is applied to the stator
Resistance is inserted in the rotar circuit
Applied voltage per stator phase is 57.7% of the line voltage
45. The rotar of an induction motor runs at __________
Synchronous speed
Below synchronous speed
Above synchronous speed
Any of the above
46. An induction motor is identical to ____________
DC compound motor
DC series motor
Synchronous motor
Asynchronous motor
47. The efficiency of an induction motor is _______ than that of a transformer.
Lower
Higher
Either of the above
None of the above
48. If the rotor circuit of a squirrel cage induction motor is open, the rotor will __________
Run at veryhigh speed
Run at very low speed
Make noise
Not run
49. Out of the following methods of starting a 3-phase induction motor, which one requires six stator terminals?
Direct on line
Star delta
Auto transformer
Rotor rheostat
50. The fractional slip of an induction motor is the ratio of __________
Rotor copper loss/rotor output
Rotor copper loss/rotor input
Rotor copper loss/stator copper loss
Stator copper loss/stator input
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