Permanent magnet synchronous motors are more efficient than induction motors due to a change in which major motor component?
Which of the following single-phase motors offers the lowest starting torque?
In a two-pole induction motor, the stator flux rotates at 3,600 rpm. Which of the following would be a typical rotor speed for this motor?
When power is applied to the stator, an expanding magnetic field is created that cuts across the rotor conductor bars and induces current in the rotor.
Test results
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Q: Permanent magnet synchronous motors are more efficient than induction motors due to a change in which major motor component?
A: Stator
Q: Permanent magnet synchronous motors are more efficient than induction motors due to a change in which major motor component?
A: Rotor
Q: Permanent magnet synchronous motors are more efficient than induction motors due to a change in which major motor component?
A: Bearings
Q: Permanent magnet synchronous motors are more efficient than induction motors due to a change in which major motor component?
A: Fan
Q: Which of the following single-phase motors offers the lowest starting torque?
A: Capacitor start/Induction run (CSIR)
Q: Which of the following single-phase motors offers the lowest starting torque?
A: Capacitor start/Capacitor run (CSCR)
Q: Which of the following single-phase motors offers the lowest starting torque?
A: Resistance start/Induction run (RSIR)
Q: Which of the following single-phase motors offers the lowest starting torque?
A: Permanent-split capacitor (PSC)
Q: In a two-pole induction motor, the stator flux rotates at 3,600 rpm. Which of the following would be a typical rotor speed for this motor?
A: 1,800 rpm
Q: In a two-pole induction motor, the stator flux rotates at 3,600 rpm. Which of the following would be a typical rotor speed for this motor?
A: 3,000 rpm
Q: In a two-pole induction motor, the stator flux rotates at 3,600 rpm. Which of the following would be a typical rotor speed for this motor?
A: 3,500 rpm.
Q: In a two-pole induction motor, the stator flux rotates at 3,600 rpm. Which of the following would be a typical rotor speed for this motor?
A: None of the above
Q: The slip in an induction motor is greater at no load than it is at full load?
A: True
Q: The slip in an induction motor is greater at no load than it is at full load?
A: False
Q: When power is applied to the stator, an expanding magnetic field is created that cuts across the rotor conductor bars and induces current in the rotor.
A: True
Q: When power is applied to the stator, an expanding magnetic field is created that cuts across the rotor conductor bars and induces current in the rotor.
A: False
Q: Which of the following is the synchronous speed for a four-pole 60Hz induction motor?
A: 1,200 rpm
Q: Which of the following is the synchronous speed for a four-pole 60Hz induction motor?
A: 1,800 rpm
Q: Which of the following is the synchronous speed for a four-pole 60Hz induction motor?
A: 3,000 rpm
Q: Which of the following is the synchronous speed for a four-pole 60Hz induction motor?
A: 3,600 rpm