Test
AC Motors
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Preguntas del test (9)
1An AC induction motor requires the stator speed and rotor speed to be the same
- AVerdadero
- BFalso
2In a squirrel cage motor current is induced into what to cause motion?
- ARotor bars
- BLamination stacks
- CStator windings
- DRotor windings
3A squirrel cage motor has very little maintenance requirements
- AVerdadero
- BFalso
4The stator speed of a motor is given by what?
- AFrequency/pairs of poles
- BPairs of poles/frequency
- C% Slip/frequency
- DFrequency/slip %
5Slip is:
- AThe difference between stator speed and rotor speed
- BThe difference between stator current and rotor current
- CThe difference between no load and full load speed
- DCatching your boys singing One Direction into a hair brush
6An 8 pole AC motor is connected to a 50Hz supply and it is found that the rotor speed is 720rpm. What is the % slip?
- A4%
- B96%
- C-0.04%
- D4.166%
7A wound rotor motor has what additional feature compared with a squirrel cage induction motor
- AResistors connected to the rotor windings
- BLess maintenance requirements
- CDC current is used rather than AC
8The purpose of slip rings in a wound rotor motor is to:
- ATo connect the resistor bank to the rotor
- BTo prevent slip between rotor speed and stator speed
- CTo hold the bearings in place
- DTo reduce the build up of eddy currents
9What rule dictates the direction of induced EMF in a conductor?
- ARight hand rule
- BLeft hand rule
Información
- Descripción
- unknown JTL Unit 63 Resources Test sobre AC Motors, creado por giannini.chambers el 22/03/2015.
- Autor
- giannini.chambers
- Idioma
- English
- Visitas
- 43
- Etiquetas
- Valoración
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