Electrical Machines
The 3 - Φ induction motors are, by a very considerable margin, the most widely used AC motors as

  they are capable of operation under range of leading and lagging pf.
  these are cheaper in cost, simple and rugged in construction.
  they have very good speed regulation.
  they have maximum efficiency and maximum starting torque.

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Electrical Machines
Flashing of DC generator means

None of these
  increasing flux density by providing extra ampere-turns in field.
  creation of residual magnetism by a DC source.
 neutralization of residual magnetism.

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Electrical Machines
Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are identical as 4% from no load to full load. Consider the governors operating at 50Hz on no load. How will the machine share, if the load is 600 MW?

 200 MW and 400MW respectively
 generator 1 gets over load
 230.7 MW and 369.23 MW respectively
 generator 2 gets over load

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Electrical Machines
Two DC generators having equal open-circuit emfs but slight different load characteristics are operating in parallel, then

  the machine will share load equally.
None of these
  the machine with more drooping characteristic will supply less load.
 the machine with more drooping characteristic will supply more load.

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