Answer True or False 5. AC motors are available as single-phase motors, typically less than 3 hp 6. AC motors can be des

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Answer True or False
5. AC motors are available as single-phase motors, typicallyless than 3 hp
6. AC motors can be designed to be operational in explosive anddust ignition environments
7. The stator core windings are coated in an epoxy resin to sealthem from moisture invasion
8. One method of connecting the plant power factor is connectingbanks to capacitors across the input lines.
9. The alternating filed causes the rotor to rotate on theshaft, making one revolution for each half-cycle of the input ACpower
10. In the AC motor as in the DC motor, the coil of wire wrappedaround the poles form an electromagnetic
11. The permanent magnetics of the conventional PM motor aremagnetized along their length or their width
12. The permanent magnetic DC motor acquires its magnetic fieldfrom a permanent magnetic and electromagnetic 13. The Hall effectsensor produces a current in the presence of a magnetic field
14. The determination of the direction of rotation by an opticalencoder is independent of the number of tracks
15. The stepper motor is capable of incrementally controllingthe velocity, distance, and the direction of its mechanicalload.
16. The stator windings directly exit the resolver
17. The single-phase operation of a resolver uses the variationin phase shift to determine shaft position
18. A three-phase variable reluctance stepper motor with 12stator windings has the windings set 30 degrees apart 19. Thetwo-phase operation of a resolver uses the variation in voltageamplitude to determine shaft position
20. The micro-stepping mode generates small stepping anglesthrough motor current control via PWM of the excitation voltage ofthe rotor windings
21. A resistance-start motor has a start winding, which is acoil made of many turns of heavy-gauge wire
22. In the capacitor-start induction-run motor, the capacitorgenerates a current in the start-winding that lags the phase of thevoltage input.
23. The centrifugal start switch is usually mounted on the shaftof the AC motor.
24. The performance of the resistance-start induction-run motorand the capacitor-start induction-run motor is basicallyidentical
25. The shaded-pole induction motor is a single-phase motor thathas no start and run windings
26. In a three-phase motor, the voltages are 180 degrees out ofphase with each other
27. The current required to run the AC motor flows through thethermal overload heater and bimetallic switch contacts
28. In a synchronous motor. The salient poles project outwardfrom the shaft of the motor
29. Detent torque is the maximum load-originating torque thatthe motor can stand without moving from its position with thestator energized
30. The speed torque and the current-torque curves are linearfor the permanent magnetic motor
31. The total encoder error is the sum of the instrument error,quadrature error, interpolation error, and quantization error
32. The coreless motor is chosen over the wound-rotor motor inhigh torque application
33. The figure of merit is a number that provides and objectivemethod of determining the relative ability of a permanent magneticmotor
34. An optical encoder is a sensor
35. The AC motor is better suited than the DC motor for thoseapplications that require variable speeds
36. On a AC motor plate, the type specifies the motor’senclosure.
37. Slip is the difference between the speed of the rotatingfield and the speed of the rotor
38. When selecting a motor, the current rating of the startermust be less than the actual current that the starter willswitch
39. In an AC servomotor, the voltage applied to the winding andthe voltage applied to the control winding are either in phase orninety degrees out of phase.