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Electrical Machines

Electrical Machines
In DC machines internal characteristics are plotted between

 Eg vs Ia
 Eg vs load current
 Vt vs Ia
 Vt vs load current

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Electrical Machines
A DC series motor is accidentally connected to single phase ac supply voltage. The torque produced will be

 steady and unidirectional
None of these
 pulsating and unidirectional
 oscillating

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Electrical Machines
DC shunt motors are suitable for

 Blowers and fans.
  All of this.
 Lathes.
 Centrifugal pumps

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Electrical Machines
A synchronous generator is feeding a zero power factor (lagging) load at rated current. The armature reaction is

 cross – magnetizing.
  demagnetizing.
 magnetizing.
 ineffective.

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Electrical Machines
Shunt field of DC generators consists of--------number of turns and ---------- conductors respectively

 less and thin
 large and thin
 large and thick
 less and thick

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Electrical Machines
For the purpose of starting an induction motor, star/delta switch is an equivalent to auto transformer of ratio

 57.7%
 50%
 66.3%
 33.3%

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MORE MCQ ON Electrical Machines

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