TCS Diploma Electrical Engineer Interview Questions and Answers for Experienced

Another name for induction motor is asynchronous motor.

• Asynchronous motor is commonly used in industrial applications.

• It operates at a slightly slower speed than the synchronous speed.

• Examples include squirrel cage induction motor and wound rotor induction motor.

Induction motors run at high speed at no load conditions

• Induction motors

• Asynchronous motors

• Squirrel cage motors

An exciter is a device that supplies the field current to the rotor winding of a synchronous machine.

• Supplies field current to the rotor winding

• Helps in generating the magnetic field in the rotor

• Essential component in synchronous machines

• Can be either brushless or brush type

• Examples include static exciter and rotating exciter

Transformers cannot operate on DC supply due to the absence of changing magnetic field required for induction.

• Transformers work on the principle of electromagnetic induction, which requires a changing magnetic field.

• DC supply produces a constant magnetic field, which does not induce a voltage in the secondary coil of the transformer.

• AC supply, on the other hand, produces a changing magnetic field, allowing for inductio...read more

Transformers cannot be measured in kW because they do not consume power, they only transfer it.

• Transformers do not have any moving parts or internal power losses, so they do not consume power themselves

• The power rating of a transformer is given in kVA (kilovolt-amperes) which represents the maximum amount of power it can transfer

• The power factor of the load connected to the transformer determines the actual power in kW