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Electrical Machines

Electrical Machines
In an induction motor, the no-load slip is generally equal to

  zero.
  less than 1 %.
 1.5 %.
 4 %.

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Electrical Machines
In DC generator on no-load, the air gap flux distribution in space is

  flat topped.
  sinusoidal.
  pulsating.
 triangular.

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Electrical Machines
In dc machines, the field-flux axis and armature-mmf axis are respectively along

 direct axis and indirect axis
 quadrature axis and direct axis
 quadrature axis and interpolar axis
 direct axis and interpolar axis

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Electrical Machines
The torque angle, in a synchronous motor, is the angle between

  the supply voltage and the back emf.
None of these
  the rotating stator flux and rotor flux.
  magnetizing electric current and back emf.

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Electrical Machines
Which of the following represents the pitch factor?

 Cos α
 Cos α²
 Cos (α/2)
 sin (α/2)

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Electrical Machines
An electric motor with constant output power will have a torque speed characteristics in the form of a

 Straight line parallel to the speed axis.
 Rectangular hyperbola
 Straight line through the origin.
 Circle about the origin.

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MORE MCQ ON Electrical Machines

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