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Electrical Machines

Electrical Machines
If a DC Series motor is connected across an AC supply it will

 not run.
 run at lower speed.
 burn.
 run at normal speed.

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Electrical Machines
The output indicate on the name plate of any motor is always the

 Gross power.
  Output power at the shaft.
 Power drawn in KVA.
 Power drawn in KW.

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Electrical Machines
DC generators are usually designed to develop armature voltages not exceeding 650 V because of the limitations imposed by

 starters
 armature winding
 commutator
 field winding

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Electrical Machines
A three phase induction motor has a synchronous speed of 1500 rpm the machine runs at 1460 rpm at a particular load. The slip at this load is ___________.

  2.67 %.
 1.5 %.
 5 %.
  30 %.

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Electrical Machines
In which of the following generators negative voltage regulation can occur?

 shunt generator
 both B and C
 series generators
 over compound generator

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Electrical Machines
Which of the following generators are used in arc welding?

 differential compound generators
 series generators
 cumulative compound generators
 shunt generators

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